林炜平
,
刘星泉
,
黄美容
,
张苏雅拉吐
,
陈志强
,
王建松
,
韩瑞
,
刘建立
,
任培培
,
石福栋
,
WADA Roy
原子核物理评论
doi:10.11804/NuclPhysRev.32.02.170
给出了反对称分子动力学模型(AMD)计算的50 MeV/nucleon 112 Sn+112 Sn反应的分析结果。该研究是反对称分子动力学模型中统计冻结概念的部分研究结果。利用自洽法结合修正的Fisher模型，提取了发射源的温度和密度分别为T=(6.1±0.2) MeV，ρ/ρ0=0.69±0.03。通过与AMD模型计算的系统在时间演化过程中的最大密度比较，得出碎片发射源的密度远小于系统的最大密度。利用自洽法提取的温度和密度与35 MeV/nucleon的40 Ca+40 Ca反应系统及40 MeV/nucleon的64 Zn+112 Sn反应系统所提取的温度和密度非常接近。该结果表明反对称分子动力学模型中，系统在中等质量碎片形成时刻处于统计冻结体积。
关键词:
统计冻结
,
反对称分子动力学
,
重离子核反应
,
自洽法
,
密度
,
温度
S.Cao
,
J.C.Tang
,
P.Zhu
金属学报(英文版)
We have calculated the sulphur 1s near edge X-roy absorption fine structure (NEX-AFS) spectra of SO2 adsorbed on Pd( 111 ) in terms of the multiple-scattering Cluster(MSC) method. The origin of the resonances in the NEXAFS spectra has been re-xealed. By the MSC calculation and a (DV)-Xα study we have for the first time iden-tiffed two weak features existing in S K-edge NEXAFS of SO2/Pd(111) system, whichare attributed to the interaction between the adsorbate and the substrate. Moreover,MSC calculation together with the reliability factor (R-.factor) analysis are employedto determine the local adsorption structures. These results are broadly in agreementwith those of Fourier-transform analysis of the surface extended X-ray absorption finestructure (SEXAFS).
关键词:
multiple-scattering cltster. near edge X-ray absorption fine structure
,
null
