Impact parameter dependence of the yield ratios of light particles as a probe of neutron skin

Yan, Tz; Li, Shan

doi:10.1007/s41365-019-0572-8

Cited by 26 publications

(11 citation statements)

References 28 publications

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“…An extended quantum molecular dynamics model [21], as one of a few microscopic transport models which can give α-clusters with a nice computation performance, has succeeded in describing multifragmentation [22], giant dipole resonance [23][24][25][26], photonuclear reactions [27] as well as collective flow and shear viscosity etc [28,29] at Fermi energy. In comparison with the traditional QMD-type model and its many applications [30][31][32][33][34][35][36][37][38][39][40][41], the EQMD model has been improved in some aspects. For example, a phenomenological Pauli potential was added, the dynamical degree of wave packets was considered, and a friction cooling method for the initialization of nuclei was used.…”

Section: Introductionmentioning

confidence: 99%

Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model

Shi

Cao

et al. 2020

Phys. Rev. C

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Direct photon produced from first proton-neutron (p-n) collision during the early stage of heavy ion reaction is a sensitive probe to reflect energy and momentum distribution of nucleons. In this work, we embedded the hard photon production channel in an extended quantum molecular dynamics (EQMD) model, and took the direct photon as a possible probe to improve namely the Fermi motion in the EQMD model. A possible scheme is offered to handle the dynamical wave packet width within incoherent bremsstrahlung process. Direct photons calculated by our modified EQMD were compared with data of 14 N + 12 C at beam energies E/A = 20, 30 and 40 MeV, and it is found that the yield, inverse slope and angular distribution of direct photons could be reasonably reproduced. In addition, asymmetric reaction systems of 4 He + C and 4 He + Zn at E/A = 53 MeV are also simulated in this work. It is found that the symmetric angular distribution in the nucleon-nucleon (N-N) center-of-mass (c.m.) frame and the velocity of theγ-emission source can be reasonably obtained from our method although there is some quantitative differences.

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Section: Introductionmentioning

confidence: 99%

Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model

Shi

Cao

et al. 2020

Phys. Rev. C

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“…Recently, Refs. [23,24] have also supported that two above probes are sensitive to neutron skin thickness. Additionally, it was proposed to extract the proton rms radii R p [25] and then deduce neutron skin from charge-changing cross sections [26].…”

Section: Introductionmentioning

confidence: 73%

Effects of neutron-skin thickness on direct hard photon emission from reactions induced by the neutron-rich projectile $^{50}$Ca

Wang,

Ma,

Fang

et al. 2022

Preprint

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Direct hard photon emissions from incoherent proton-neutron bremsstrahlung in the collisions of neutron-rich projectile 50 Ca with 12 C and 40 Ca targets are simulated in the framework of IQMD model, respectively. By adjusting the diffuseness parameter of neutron density in the droplet model to obtain different neutron skin thickness for 50 Ca, the effects of neutron skin thickness on direct hard photon emission are investigated via several probes. The results show that more direct hard photons are produced with the increasing of the neutron skin thickness. Meanwhile, we find that yield ratio Rcp(σγ) and the rapidity dependence of multiplicity and multiplicity ratio Rcp(Nγ) for direct hard photons are apparently sensitive to neutron skin thickness. Furthermore, the direct hard photon differential and relative flows between central and peripheral collision are presented. We find that the differential flow is slightly more sensitive to neutron skin thickness than the relative flow. It is suggested that direct hard photon emission may be used as an experimental observable to extract the information of neutron skin thickness.

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“…Numerous applications of IQMD have been made for different observable, and some recent ones can be found in Ref. [62][63][64][65][66].…”

Section: A Iqmd Modelmentioning

confidence: 99%

Determining the temperature in heavy-ion collisions with multiplicity distribution

Song,

Wang,

et al. 2021

Preprint

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By relating the charge multiplicity distribution and the temperature of a de-exciting nucleus through a deep neural network, we propose that the charge multiplicity distribution can be used as a thermometer of heavy-ion collisions. Based on an isospin-dependent quantum molecular dynamics model, we study the caloric curve of reaction 103 Pd + 9 Be with the apparent temperature determined through the charge multiplicity distribution. The caloric curve shows a characteristic signature of nuclear liquid-gas phase transition around the apparent temperature Tap = 6.4 MeV, which is consistent with that through a traditional heavy-ion collision thermometer, and indicates the viability of determining the temperature in heavy-ion collisions with multiplicity distribution.

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Impact parameter dependence of the yield ratios of light particles as a probe of neutron skin

Cited by 26 publications

References 28 publications

Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model

Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model

Effects of neutron-skin thickness on direct hard photon emission from reactions induced by the neutron-rich projectile $^{50}$Ca

Determining the temperature in heavy-ion collisions with multiplicity distribution

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