Nuclear temperature and its dependence on the source neutron-proton asymmetry deduced using the Albergo thermometer
Nuclear temperature and its dependence on the source neutron-proton asymmetry deduced using the Albergo thermometer
复制标题
使用 Albergo 温度计推导出的核温度及其对源中子-质子不对称性的依赖性
DOI：
10.1103/physrevc.103.014601
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发表时间：
2021
影响因子：
3.1
通讯作者：
Natowitz J. B.
中科院分区：
文献类型：
--
作者：
Huang Y.;Zheng H.;Wada R.;Liu X.;Lin W.;Qu G.;Huang M.;Ren P.;Han J.;Bonasera A.;Hagel K.;Rodrigues M. R. D.;Kowalski S.;Keutgen T.;Barbui M.;Natowitz J. B.
研究了双同位素、等压线和等压线产率比对、质子和中子差的阿尔伯戈温度计。在没有任何额外的序次衰变校正的情况下，利用Albergo体温计首次从$^{64}\mathrm{Zn}+^{112}\mathrm{Sn}$ 40 MeV/核子碰撞中重建的初级热中质量碎片（IMFs）的产率推导出了$4.9\ifmmode\pm\else\textpm\fi{}0.5$ MeV的实际温值。采用Tsang等人的经验校正因子方法，在40 MeV/核子下，对另外12个具有不同中子-质子（N/Z）不对称的反应体系$^{70}\ mathm {Zn}$, $^{64}\ mathm {Ni}$, $^{112,124}\ mathm {Sn}$, $^{58,64}\ mathm {Ni}$, $^{197}\ mathm {Au}$和$^{232}\ mathm {Th}$进行了从表观温度到实际温度的实验顺序衰减校正。[j] .光子学报，1997,38(1):1 - 4。利用这13个系统的实际源温值，进一步研究了核温度与源N/Z不对称性的关系。结果表明，在现有的源N/Z$范围内，推导出的实际源温度对源N/Z$不对称性的依赖性较弱。通过与其他独立实验结果的比较，得到了核温度的N/Z不对称关系的一致描述。
Albergo thermometers with double isotope, isotone, and isobar yield ratio pairs with one proton and/or neutron difference are investigated. Without any extra sequential decay correction, a real temperature value of $4.9\ifmmode\pm\else\textpm\fi{}0.5$ MeV is deduced from the yields of the experimentally reconstructed primary hot intermediate mass fragments (IMFs) from $^{64}\mathrm{Zn}+^{112}\mathrm{Sn}$ collisions at 40 MeV/nucleon using the Albergo thermometer for the first time. An experimental sequential decay correction from the apparent temperatures to the real ones for 12 other reaction systems with different neutron-proton ($N/Z$) asymmetries in the same experiment, $^{70}\mathrm{Zn}$, $^{64}\mathrm{Ni}$ on $^{112,124}\mathrm{Sn}$, $^{58,64}\mathrm{Ni}$, $^{197}\mathrm{Au}$, and $^{232}\mathrm{Th}$ at 40 MeV/nucleon, is performed using an empirical correction factor approach of Tsang et al. [Phys. Rev. Lett. 78, 3836 (1997)] with the deduced 4.9-MeV temperature value. The dependence of nuclear temperature on the source $N/Z$ asymmetry is further investigated using these deduced real source temperature values from the present 13 systems. It is found that the deduced real source temperatures at the present source $N/Z$ range show a rather weak dependence on the source $N/Z$ asymmetry. By comparison between our previous results and those from other independent experiments, a consistent description for the $N/Z$ asymmetry dependence of nuclear temperature is addressed.