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Probing the neutron-proton asymmetry dependence of the nuclear source temperature with light charged particles

Journal Article · · Physical Review C
 [1];  [2];  [3];  [4];  [2];  [2];  [5];  [2];  [2];  [6];  [7];  [8];  [9];  [9];  [10];  [9]
  1. Sichuan Univ., Chengdu (China); Cyclotron Institute, Texas A&M University, TX (United States)
  2. Sichuan Univ., Chengdu (China)
  3. Shaanxi Normal Univ., Xi'an (China)
  4. Texas A & M Univ., College Station, TX (United States); Henan Normal Univ., Xinxiang (China)
  5. Inner Mongolia Univ. for Nationalities, Tongliao (China)
  6. Univ. of Sao Paulo (Brazil)
  7. Silesia Univ., Katowice (Poland)
  8. Universite Catholique de Louvain, Louvain-la-Neuve (Belgium)
  9. Texas A & M Univ., College Station, TX (United States)
  10. Texas A & M Univ., College Station, TX (United States); National Inst. of Nuclear Physics (INFN), Catania (Italy)
+ Show Author Affiliations
The dependence of the nuclear temperature on the source neutron-proton (N/Z) asymmetry was experimentally investigated with the light charged particles (LCPs) generated from thirteen reaction systems with different N/Z asymmetries, 64Zn on 112Sn and 70Zn, 64Ni on 112,124Sn, 58,64Ni, 197Au, 232Th at 40 MeV/u. A rather weak N/Z asymmetry dependence of the source temperature was qualitatively inferred from the extracted N/Z asymmetry dependence of the apparent temperature and that of the relative temperature change by the sequential decay effects with the help of the theoretical simulations. Comparing the present result with those from our previous work and other available experimental results, a weak N/Z asymmetry dependence of nuclear temperature is commonly observed in different independent experiments and with different thermometers, except for the result reported by McIntosh et al. [Phys. Lett. B 719, 337 (2013)]. Here, the origin of the difference between the conclusion of the former group and that of McIntosh et al. was addressed, using statistical multifragmentation model (SMM) simulations.
Research Organization:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NNSFC); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-93ER40773
OSTI ID:
1781633
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 6 Vol. 101; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
low and intermediate energy heavy-ion reactions