Symmetry energy and experimentally observed cold fragments in intermediate heavy-ion collisions

Su-Ya-La-Tu Zhang; Mei-Rong Huang; R. Wada; Xing-Quan Liu; Wei-Ping Lin; Jian-Song Wang

doi:10.1088/1674-1137/41/4/044001

Chinese Physics C> 2017, Vol. 41> Issue(4) : 044001 DOI: 10.1088/1674-1137/41/4/044001

Symmetry energy and experimentally observed cold fragments in intermediate heavy-ion collisions

1.
College of Physics and Electronics Information, Inner Mongolia University for Nationalities, Tongliao 028000, China
2.
Cyclotron Institute, Texas A&
3.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000,China

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Abstract：
An attempt is made to study the symmetry energy at the time of primary fragment formation from the experimentally observed cold fragments for a neutron-rich system of ⁶⁴Ni+⁹Be at 140 MeV/nucleon, utilizing the recent finding that the excitation energy becomes lower for more neutron-rich isotopes with a given Z value. The extracted a_sym/T values from the cold fragments, based on the Modified Fisher Model (MFM), are compared to those from the primary fragments of the antisymmetrized molecular dynamics (AMD) simulation and become consistent with the simulation when the I=N-Z value becomes larger, indicating that the excitation energy of these neutron-rich isotopes is indeed lower.
- symmetry energy ,
- modified Fisher model ,
- antisymmetrized molecular dynamics simulations

References

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Su-Ya-La-Tu Zhang, Mei-Rong Huang, R. Wada, Xing-Quan Liu, Wei-Ping Lin and Jian-Song Wang. Symmetry energy and experimentally observed cold fragments in intermediate heavy-ion collisions[J]. Chinese Physics C, 2017, 41(4): 044001. doi: 10.1088/1674-1137/41/4/044001

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Received: 2016-09-04

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Supported by National Natural Science Foundation of China (U1432247, 11605097), National Basic Research Program of China (973 Program, 2014CB845405), Doctoral Scientific Research Foundation of Inner Mongolia University for the Nationalities (BS365)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Symmetry energy and experimentally observed cold fragments in intermediate heavy-ion collisions

Corresponding author: Mei-Rong Huang,

Corresponding author: R. Wada, huangmeirong@imun.edu.cn

1. College of Physics and Electronics Information, Inner Mongolia University for Nationalities, Tongliao 028000, China

2. Cyclotron Institute, Texas A&

3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000,China

Received Date: 2016-09-04

Available Online: 2017-04-05

Fund Project: Supported by National Natural Science Foundation of China (U1432247, 11605097), National Basic Research Program of China (973 Program, 2014CB845405), Doctoral Scientific Research Foundation of Inner Mongolia University for the Nationalities (BS365)

Abstract: An attempt is made to study the symmetry energy at the time of primary fragment formation from the experimentally observed cold fragments for a neutron-rich system of ⁶⁴Ni+⁹Be at 140 MeV/nucleon, utilizing the recent finding that the excitation energy becomes lower for more neutron-rich isotopes with a given Z value. The extracted a_sym/T values from the cold fragments, based on the Modified Fisher Model (MFM), are compared to those from the primary fragments of the antisymmetrized molecular dynamics (AMD) simulation and become consistent with the simulation when the I=N-Z value becomes larger, indicating that the excitation energy of these neutron-rich isotopes is indeed lower.

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Symmetry energy and experimentally observed cold fragments in intermediate heavy-ion collisions

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