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M. Jean Colin

Professeur UCBN

Groupe : Applications industrielles et médicales

colin in2p3.fr


Tel : +33 2 31 45 29 70


PUBLICATIONS


[in2p3-01347982] Characterization and performances of DOSION, a dosimetry equipment dedicated to radiobiology experiments taking place at GANIL

17 mars 2017

Currently,radiobiology experiments using heavy ions at GANIL GrandAccélérateurNationald’IonsLourds) are conducted under the supervision of the CIMAP (Center for research on Ions, MAterials and Photonics). In this context, a new beam monitoring equipment named DOSION has been developed. It allows (...)

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[hal-00012240] Evidence for Spinodal Decomposition in Nuclear Multifragmentation

3 juillet 2015

Multifragmentation of a ``fused system\'\' was observed for central collisions between 32 MeV/nucleon 129Xe and natSn. Most of the resulting charged products were well identified thanks to the high performances of the INDRA 4pi array. Experimental higher-order charge correlations for fragments (...)

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[in2p3-00010822] Emission time scale of light particles in the system Xe+Sn at 50 A.MeV - A probe for dynamical emission ?

3 juillet 2015

Proton and deuteron correlation functions have been investigated with both impact parameter and emission source selections. The correlations of the system 129Xe+NatSn at 50 AMeV have been measured with the 4π INDRA which provides a complete kinematical description of each event. The emission (...)

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[in2p3-00009760] New method for the discrimination of single-source events in heavy-ion collisions

3 juillet 2015

This paper introduces a new method for the selection of central single-source events, based on classical multivariate techniques. The resulting discriminating variable is shown to be valid for different hypotheses on the nuclear source deexcitation mechanism. It enables the selection of events (...)

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[in2p3-00007851] Dynamical effects in nuclear collisions in the fermi energy range: aligned breakup of heavy projectiles

3 juillet 2015

Recent experimental results concerning heavy systems (Pb + Au, Pb + Ag, Pb + Al, Gd + C, Gd + U, Xe + Sn, ...) obtained at GANIL with the INDRA and NAUTILUS 4$\pi arrays will be presented. The study of reaction mechanisms has shown the dominant binary and highly dissipative character of the (...)

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[in2p3-00003952] Study of intermediate velocity products in the Ar+Ni collisions between 52 and 95 A.MeV

3 juillet 2015

Intermediate velocity products in Ar+Ni collisions from 52 to 95 A.MeV are studied in an experiment performed at the GANIL facility with the 4$\pi$ multidetector INDRA. It is shown that these emissions cannot be explained by statistical decays of the quasi-projectile and the quasi-target in (...)

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[in2p3-00003421] Is reducibility in nuclear multifragmentation related to thermal scaling?

3 juillet 2015

Thermal scaling (Arrhenius law for an “elementary” probability p of binomial function) and reducibility in intermediate mass fragments (IMF's) production are examined for data of the reaction 129Xe+ natSn at 50 MeV/u. The study of the longitudinal velocities and of the average transverse energies (...)

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[in2p3-00005978] Evidence for dynamical proton emission in peripheral Xe + Sn collisions at 50 MeV/u

3 juillet 2015

Relative angle correlation functions for mid-rapidity protons built up from 50 MeV/u Xe+Sn data recorded by the INDRA multidetector exhibit the characteristics of a non-equilibrated emission: they show an energy dependent anisotropy which cannot be accounted for by standard evaporation (...)

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[in2p3-00005276] Digital filtering a common analysis for data and mean field theories in heavy-ions collisions at intermediate energy

3 juillet 2015

To select well-defined event configurations from heavy-ion collisions in the Fermi energy domain, a digital filtering technique of the charge density distribution along the deflection axis in the velocity space is presented. Charge density appears as a robust variable and can be used for a (...)

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[in2p3-00003451] Surveying the nuclear caloric curve

3 juillet 2015

The 4π array INDRA was used to detect nearly all charged products emitted in Ar + Ni collisions between 52 and 95 MeV/u. The charge, mass and excitation energy E∗ of the quasi-projectiles have been reconstructed event by event. Excitation energies up to 25 MeV per nucleon are (...)

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[in2p3-00000114] A hot expanding source in 50 A MeV Xe+Sn central reactions

3 juillet 2015

The INDRA multidetector has been used to study multifragmentation processes in central collisions for the Xe + Sn reaction at 50 A MeV. A single isotropic source formed at an excitation energy of 12 A MeV exhausting most of the emitted charged products has been isolated in such collisions. The (...)

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[in2p3-00003596] Mass scaling of reaction mechanisms in intermediate energy heavy ion collisions

3 juillet 2015

Reaction mechanisms have been studied for two nearly symmetrical systems of different total mass, between 25 and 74 AMeV. It is shown that collisions are mostly binary whatever the system mass and the bombarding energy. From the slowing-down of the partners, it is possible to establish the (...)

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[in2p3-00008144] Prompt light particle emission in the $^{36}$Ar+$^{58}$Ni reaction at 95 MeV/nucleon

3 juillet 2015

The prompt component at intermediate velocity of light charged particles is investigated. An improved coalescence model coupled to the intra-nuclear cascade code ISABEL is used to obtain light complex particle energy spectra and multiplicities as a function of impact parameter. The results are (...)

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[in2p3-00000038] Independence of fragment charge distributions of the size of heavy multifragmenting sources

3 juillet 2015

Charged product multiplicities and Z distributions were measured for single multifragmenting sources produced in collisions between Full-size image ( 1 K) and Full-size image ( 1 K) at the same available energy per nucleon. Z distributions are found identical for both reactions while fragment (...)

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[in2p3-00009778] Properties of light particles produced in Ar + Ni collisions at 95 A.MeV : evaporation versus prompt emission

3 juillet 2015

Intermediate velocity emissions of light charged particle are studied for te Ar + Ni system at 95 A. MeV. Experimental parallel veocity distributions and transverse energies are compared to those of a calculation based on intranuclear cascades followed by an evaporation step. The trend of the (...)

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[in2p3-00839436] Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning

30 juin 2015

Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, the medical application group from the Laboratory of Corpuscular Physics (LPC Caen) developed an Ionization Chamber in collaboration with the company IBA (Ion Beam Applications). This monitoring device (...)

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Comparisons of hadrontherapy-relevant data to nuclear interaction codes in the Geant4 toolkit

10 janvier 2014

Comparisons between experimental data, INCL and other nuclear models available in the Geant4 toolkit are presented. The data used for the comparisons come from a fragmentation experiment realised at GANIL facility. The main purpose of this experiment was to measure production rates and angular (...)

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[in2p3-00879483] Proton computed tomography from multiple physics processes

4 novembre 2013

Proton CT (pCT) nowadays aims at improving hadron therapy treatment planning by mapping the relative stopping power (RSP) of materials with respect to water. The RSP depends mainly on the electron density of the materials. The main information used is the energy of the protons. However, during (...)

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Simulation study on light ions identification methods for carbon beams from 95 to 400 MeV/A

1er octobre 2013

Monte Carlo simulations have been performed in order to evaluate the efficiencies of several light ions identification techniques. The detection system was composed with layers of scintillating material to measure either the deposited energy or the time-of-flight of ions produced by nuclear (...)

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Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning

28 juin 2013

Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, the medical application group from the Laboratory of Corpuscular Physics (LPC Caen) developed an Ionization Chamber in collaboration with the company IBA (Ion Beam Applications). This monitoring device (...)

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Characterization and performances of a monitoring ionization chamber dedicated to IBA-universal irradiation head for Pencil Beam Scanning

18 juin 2013

Every radiotherapy center has to be equipped with real-time beam monitoring devices. In 2008, the medical application group from the Laboratory of Corpuscular Physics (LPC Caen) developed an Ionization Chamber in collaboration with the company IBA (Ion Beam Applications). This monitoring device (...)

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[in2p3-00829487] Double differential fragmentation cross-section measurements of 95 MeV/u 12C on thin targets for hadrontherapy

3 juin 2013

During therapeutic treatment with heavy ions like carbon, the beam undergoes nuclear fragmentation and secondary light charged particles, in particular protons and alpha particles, are produced. To estimate the dose deposited into the tumors and the surrounding healthy tissues, an accurate (...)

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Nuclear Fragmentation Measurements for Hadrontherapy: 95MeV/u 12C Reactions on H, C, Al, O and nat Ti Targets

30 avril 2013

The interest for hadrontherapy, the use of ion beams for the treatments of cancerous tumors, is increasing. This can be attributed to the great accuracy of ion beams to target the tumor while sparing the surrounding healthy tissues (due to the high dose deposition in the Bragg peak and the (...)

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[in2p3-00806234] Comparison of two analysis methods for nuclear reaction measurements of 12C +12C interactions at 95 MeV/u for hadrontherapy

29 mars 2013

During therapeutic treatment with heavier ions like carbon, the beam undergoes nuclear fragmentation and secondary light charged particles, in particular protons and alpha particles, are produced. To estimate the dose deposited into the tumors and the surrounding healthy tissues, the accuracy (...)

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Nuclear Fragmentation Measurements for Hadrontherapy: 95MeV/u 12C Reactions on H, C, Al, O and natTi Targets

5 mars 2013

The interest for hadrontherapy, the use of ion beams for the treatments of cancerous tumors, is increasing. This can be attributed to the great accuracy of ion beams to target the tumor while sparing the surrounding healthy tissues (due to the high dose deposition in the Bragg peak and the (...)

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Characterization of a detection system for an anthropomorphic phantom designed to measure the effective dose for photon fields

28 février 2012

The Laboratory of Dosimetry for Ionizing Radiation at the Institute for Radiological Protection and Nuclear Safety in France is developing an instrumented anthropomorphic dummy to evaluate the effective dose for photon fields in workplaces. This anthropomorphic phantom will be equipped (...)

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Nuclear Physics and Hadron Therapy

17 février 2012

Hadron therapy uses light charged particles beams (mainly proton and 12C ions) to irradiate tumors. These beams present a ballistic advantage with a maximum energy deposition at the end of the path. A large dose can be delivered inside a deep tumor while the surrounding healthy tissues are (...)

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Nuclear reaction measurements of 95MeV/u 12C interactions on PMMA for hadrontherapy

6 septembre 2011

The ion dose deposition in tissues is characterized by a favorable depth dose profile (i.e. Bragg peak) and a small lateral spread. In order to keep these benefits of ions in cancer treatments, a very high accuracy is required on the dose deposition (±3%). For given target stoechiometry and (...)

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[in2p3-00619633] Nuclear reaction measurements of 95MeV/u 12C interactions on PMMA for hadrontherapy

6 septembre 2011

The ion dose deposition in tissues is characterized by a favorable depth dose profile (i.e. Bragg peak) and a small lateral spread. In order to keep these benefits of ions in cancer treatments, a very high accuracy is required on the dose deposition (±3%). For given target stoechiometry and (...)

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Effective dose measurement at workplaces within an instrumented anthropomorphic phantom

26 avril 2011

The Laboratory of Ionizing Radiation Dosimetry of the IRSN (France) is developing an instrumented anthropomorphic phantom in order to measure the effective dose for photon fields at workplaces. This anthropomorphic phantom will be equipped with small active detectors located inside at chosen (...)

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[in2p3-00588785] Effective dose measurement at workplaces within an instrumented anthropomorphic phantom

26 avril 2011

The Laboratory of Ionizing Radiation Dosimetry of the IRSN (France) is developing an instrumented anthropomorphic phantom in order to measure the effective dose for photon fields at workplaces. This anthropomorphic phantom will be equipped with small active detectors located inside at chosen (...)

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Les réseaux loco-régionaux de PCR : un outil nécessaire

9 décembre 2010

La radioprotection, en France, repose en partie sur les « personnes compétentes en radioprotection » (PCR). Les différents textes réglementaires qui se sont succédés montrent l'évolution de ses fonctions. Dans leur mission au quotidien, ces acteurs de terrain peuvent être confrontés à de multiples (...)

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[in2p3-00544850] Les réseaux loco-régionaux de PCR : un outil nécessaire

9 décembre 2010

La radioprotection, en France, repose en partie sur les « personnes compétentes en radioprotection » (PCR). Les différents textes réglementaires qui se sont succédés montrent l'évolution de ses fonctions. Dans leur mission au quotidien, ces acteurs de terrain peuvent être confrontés à de multiples (...)

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Multifragmentation and spinodal decomposition of finite nuclear systems

28 avril 2009

A bulk effect in multifragmentation of very heavy fused systems has been experimentally evidenced. Such an effect is very well reproduced by a complete dynamical simulation of collisions in which multifragmentation occurs through the growth of density fluctuations in the unstable spinodal (...)

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Multifragmentation and spinodal decomposition of finite nuclear systems

28 avril 2009

A bulk effect in multifragmentation of very heavy fused systems has been experimentally evidenced. Such an effect is very well reproduced by a complete dynamical simulation of collisions in which multifragmentation occurs through the growth of density fluctuations in the unstable spinodal (...)

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The DosiMap, a new 2D scintillating dosimeter for IMRT quality assurance: Characterization of two Cerenkov discrimination methods

21 janvier 2009

New radiation therapy techniques such as IMRT present significant efficiency due to their highly conformal dose distributions. A consequence of the complexity of their dose distributions (high gradients, small irradiation fields, low dose distribution, ...) is the requirement for better (...)

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[in2p3-00354893] The DosiMap, a new 2D scintillating dosimeter for IMRT quality assurance: Characterization of two Cerenkov discrimination methods

21 janvier 2009

New radiation therapy techniques such as IMRT present significant efficiency due to their highly conformal dose distributions. A consequence of the complexity of their dose distributions (high gradients, small irradiation fields, low dose distribution, ...) is the requirement for better (...)

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Comparative study of plastic scintillators for dosimetric applications

21 janvier 2009

Plastic scintillators are widely studied for radiotherapy dosimetry because of their very interesting properties and especially their water equivalence. Nevertheless, to ensure accurate dose measurements, the properties of the scintillators must be very well known and adapted to this (...)

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[in2p3-00354851] Comparative study of plastic scintillators for dosimetric applications

21 janvier 2009

Plastic scintillators are widely studied for radiotherapy dosimetry because of their very interesting properties and especially their water equivalence. Nevertheless, to ensure accurate dose measurements, the properties of the scintillators must be very well known and adapted to this (...)

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On-line monitoring of fluence distributions and imaging of scanning ion beams

25 février 2008

In this paper we describe the design of an ion beam monitor developed to control irradiations of biological samples with ions at GANIL (Grand Accélérateur National d'Ions Lourds). This device can be used as an on-line monitor to provide transverse fluence distributions for active scanning ion (...)

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[in2p3-00258718] On-line monitoring of fluence distributions and imaging of scanning ion beams

25 février 2008

In this paper we describe the design of an ion beam monitor developed to control irradiations of biological samples with ions at GANIL (Grand Accélérateur National d'Ions Lourds). This device can be used as an on-line monitor to provide transverse fluence distributions for active scanning ion (...)

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An On-line Monitor for Fluence Distributions and Imaging of Scanning Ion Beams

6 décembre 2007

Clinical applications of hadron beams have generated a wide development of radiobiology experiments, especially at GANIL (Grand Accélérateur National d'Ions Lourds), an ion accelerator in Caen. Biological samples are irradiated with ions in order to observe the induced biological effects. As (...)

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An On-line Monitor for Fluence Distributions and Imaging of Scanning Ion Beams

6 décembre 2007

Clinical applications of hadron beams have generated a wide development of radiobiology experiments, especially at GANIL (Grand Accélérateur National d'Ions Lourds), an ion accelerator in Caen. Biological samples are irradiated with ions in order to observe the induced biological effects. As (...)

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Scintillating fiber dosimeter

19 juillet 2007

Radiotherapy treatments become more and more accurate, using techniques like IMRT. Their irradiation fields and dose depositions are small and complex, and only a few dosimeters are available for real time and in vivo control for photons as well as for electrons beams. In this context, a new (...)

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Scintillating fiber dosimeter

19 juillet 2007

Radiotherapy treatments become more and more accurate, using techniques like IMRT. Their irradiation fields and dose depositions are small and complex, and only a few dosimeters are available for real time and in vivo control for photons as well as for electrons beams. In this context, a new (...)

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Heavy ion beams monitoring for radiobiology applications

19 juillet 2007

We describe the design and the construction of an on-line ion beam monitor. The device provides accurate measurements for radiobiology experiments currently held at GANIL (Grand Accélérateur National d'Ions Lourds) in France. A prototype named IBIS (Ion Beam Inspection System) has been tested at (...)

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Heavy ion beams monitoring for radiobiology applications

19 juillet 2007

We describe the design and the construction of an on-line ion beam monitor. The device provides accurate measurements for radiobiology experiments currently held at GANIL (Grand Accélérateur National d'Ions Lourds) in France. A prototype named IBIS (Ion Beam Inspection System) has been tested at (...)

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Correlations of neutral and charged particles in $^{40}$Ar- $^{58}$Ni reaction at 77 MeV/u

24 mai 2007

The measurement of the two-particle correlation function for different particle species allows to obtain information about the development of the particle emission process: the space-time properties of emitting sources and the emission time sequence of different particles. The single-particle (...)

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[in2p3-00149009] Correlations of neutral and charged particles in $^{40}$Ar- $^{58}$Ni reaction at 77 MeV/u

24 mai 2007

The measurement of the two-particle correlation function for different particle species allows to obtain information about the development of the particle emission process: the space-time properties of emitting sources and the emission time sequence of different particles. The single-particle (...)

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Universal fluctuations: a new approach to the study of phase transitions in intermediate energy heavy ion collisions

15 janvier 2007

The universal theory of order parameter fluctuations (D-scaling laws) is applied to a wide range of intermediate energy heavy-ion collision data obtained with INDRA. This systematic study confirms that the observed fragment production is compatible with aggregation scenarios for in- or (...)

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Universal fluctuations: a new approach to the study of phase transitions in intermediate energy heavy ion collisions

15 janvier 2007

The universal theory of order parameter fluctuations (D-scaling laws) is applied to a wide range of intermediate energy heavy-ion collision data obtained with INDRA. This systematic study confirms that the observed fragment production is compatible with aggregation scenarios for in- or (...)

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Effect of the intermediate velocity emissions on the quasi-projectile properties for the Ar + Ni system at 95 A.MeV

4 janvier 2007

The quasi-projectile (QP) properties are investigated in the Ar+Ni collisions at 95 A.MeV taking into account the intermediate velocity emission. Indeed, in this reaction, between 52 and 95 A.MeV bombarding energies, the number of particles emitted in the intermediate velocity region is related (...)

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[in2p3-00006315] Effect of the intermediate velocity emissions on the quasi-projectile properties for the Ar + Ni system at 95 A.MeV

4 janvier 2007

The quasi-projectile (QP) properties are investigated in the Ar+Ni collisions at 95 A.MeV taking into account the intermediate velocity emission. Indeed, in this reaction, between 52 and 95 A.MeV bombarding energies, the number of particles emitted in the intermediate velocity region is related (...)

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Spectral discrimination of Cerenkov radiation in scintillating dosimeters

21 novembre 2006

Radiation therapy accelerators require highly accurate dose deposition and the output must be monitored frequently and regularly. Ionization chambers are the primary tool for this control, but their size, their high voltage needed, and the correction needed for electrons make them unsuitable (...)

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[in2p3-00113799] Spectral discrimination of Cerenkov radiation in scintillating dosimeters

21 novembre 2006

Radiation therapy accelerators require highly accurate dose deposition and the output must be monitored frequently and regularly. Ionization chambers are the primary tool for this control, but their size, their high voltage needed, and the correction needed for electrons make them unsuitable (...)

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A new scintillating fiber dosimeter using a single optical fiber and a CCD camera

23 août 2006

Radiotherapy treatments become more and more accurate, using very small irradiation fields and complex dose depositions. So small dosimeters for real time and in vivo dosimetry, suitable for photons as well as for electrons beams are highly desired. In this context, a scintillating fiber (...)

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[in2p3-00089774] A new scintillating fiber dosimeter using a single optical fiber and a CCD camera

23 août 2006

Radiotherapy treatments become more and more accurate, using very small irradiation fields and complex dose depositions. So small dosimeters for real time and in vivo dosimetry, suitable for photons as well as for electrons beams are highly desired. In this context, a scintillating fiber (...)

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Multifragmentation of a very heavy nuclear system (I): selection of a single-source events

10 juillet 2006

A sample of `single-source' events, compatible with the multifragmentation of very heavy fused systems, are isolated among well-measured $^155$Gd+$^nat$U 36AMeV reactions by examining the evolution of the kinematics of fragments with Z>=5 as a function of the dissipated energy and loss of (...)

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[in2p3-00009773] Multifragmentation of a very heavy nuclear system (I): selection of a single-source events

10 juillet 2006

A sample of `single-source' events, compatible with the multifragmentation of very heavy fused systems, are isolated among well-measured $^155$Gd+$^nat$U 36AMeV reactions by examining the evolution of the kinematics of fragments with Z>=5 as a function of the dissipated energy and loss of (...)

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Multifragmentation of a very heavy nuclear system (II) bulk properties and spinodal decomposition

10 juillet 2006

The properties of fragments and light charged particles emitted in multifragmentation of single sources formed in central 36AMeV Gd+U collisions are reviewed. Most of the products are isotropically distributed in the reaction c.m. Fragment kinetic energies reveal the onset of radial collective (...)

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[in2p3-00009766] Multifragmentation of a very heavy nuclear system (II) bulk properties and spinodal decomposition

10 juillet 2006

The properties of fragments and light charged particles emitted in multifragmentation of single sources formed in central 36AMeV Gd+U collisions are reviewed. Most of the products are isotropically distributed in the reaction c.m. Fragment kinetic energies reveal the onset of radial collective (...)

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Response of CsI(Tl) scintillators over a large range in energy and atomic number of ions (Part I) : recombination and $\delta$-electrons

7 juillet 2006

A simple formalism describing the light response of CsI(Tl) to heavy ions, which quantifies the luminescence and the quenching in terms of the competition between radiative transitions following the carrier trapping at the Tl activator sites and the electron-hole recombination, is proposed. The (...)

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[in2p3-00019578] Response of CsI(Tl) scintillators over a large range in energy and atomic number of ions (Part I) : recombination and $\delta$-electrons

7 juillet 2006

A simple formalism describing the light response of CsI(Tl) to heavy ions, which quantifies the luminescence and the quenching in terms of the competition between radiative transitions following the carrier trapping at the Tl activator sites and the electron-hole recombination, is proposed. The (...)

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Liquid-Gas Coexistence Region in Central Xe+Sn Reactions

18 octobre 2005

Charge partitions and distributions of fragments emitted in multifragmentation of fused systems produced in central collisions are studied over the incident energy range 32-50 MeV per nucleon. Most of the charged products are well identified thanks to the high performances of the INDRA 4pi (...)

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Liquid-Gas Coexistence Region in Central Xe+Sn Reactions

18 octobre 2005

Charge partitions and distributions of fragments emitted in multifragmentation of fused systems produced in central collisions are studied over the incident energy range 32-50 MeV per nucleon. Most of the charged products are well identified thanks to the high performances of the INDRA 4pi (...)

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Evidence for Spinodal Decomposition in Nuclear Multifragmentation

18 octobre 2005

Multifragmentation of a ``fused system\'\' was observed for central collisions between 32 MeV/nucleon 129Xe and natSn. Most of the resulting charged products were well identified thanks to the high performances of the INDRA 4pi array. Experimental higher-order charge correlations for fragments (...)

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Evidence for Spinodal Decomposition in Nuclear Multifragmentation

18 octobre 2005

Multifragmentation of a ``fused system\'\' was observed for central collisions between 32 MeV/nucleon 129Xe and natSn. Most of the resulting charged products were well identified thanks to the high performances of the INDRA 4pi array. Experimental higher-order charge correlations for fragments (...)

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Evolution of Fragment Distributions and Reaction Mechanisms for the Ar+Ni System from 32 to 95 A.MeV

24 juin 2005

Within the framework of flow and multifragmentation study, the 36Ar+58Ni experiment has been performed at seven incident energies from 32 to 95 A.MeV with the INDRA detector at GANIL. After a brief description of the experimental set-up, the main trends as well as the evolution of fragment (...)

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Evolution of Fragment Distributions and Reaction Mechanisms for the Ar+Ni System from 32 to 95 A.MeV

24 juin 2005

Within the framework of flow and multifragmentation study, the 36Ar+58Ni experiment has been performed at seven incident energies from 32 to 95 A.MeV with the INDRA detector at GANIL. After a brief description of the experimental set-up, the main trends as well as the evolution of fragment (...)

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Neutron to proton ratios of quasiprojectile and midrapidity emission in the ${58}$Ni-${58}$Ni reaction at 52 MeV/Nucleon

16 mars 2005

By combining data from a charged particle $^58$Ni+$^58$Ni experiment at 52 MeV/nucleon with an $^36$Ar+$^58$Ni experiment at 50 MeV/nucleon for which free neutrons have been detected, an increase in the neutron to proton ratio of the whole nuclear material at midrapidity has been experimentally (...)

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[in2p3-00023886] Neutron to proton ratios of quasiprojectile and midrapidity emission in the ${58}$Ni-${58}$Ni reaction at 52 MeV/Nucleon

16 mars 2005

By combining data from a charged particle $^58$Ni+$^58$Ni experiment at 52 MeV/nucleon with an $^36$Ar+$^58$Ni experiment at 50 MeV/nucleon for which free neutrons have been detected, an increase in the neutron to proton ratio of the whole nuclear material at midrapidity has been experimentally (...)

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Influence of the Coulomb field on charged particle emission in Ar + Ni reaction at 77 MeV/u

17 mars 2004

Ar+Ni collisions at 77 MeV/u were studied in the experiment E286 performed at GANIL. An important advantage of this experiment was an application of the neutron detector DEMON for registration of both neutral and charged particles. This feature allows to compare characteristics of neutrons and (...)

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[in2p3-00012206] Can we really measure the internal energy of hot nuclei with a 4$\pi$ detection array ?

25 mars 2002

The second generation of high-quality detection arrays gave hope to nuclear physicists to finally obtain an experimental equation of state of nuclear matter. In spite of this progress, the measurement of the internal energy of a hot nucleus remains a very difficult task. This paper illustrates (...)

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