Temperature Dependence of the Width of the Giant Dipole Resonance in 120Sn and 208Pb.
Temperature Dependence of the Width of the Giant Dipole Resonance in 120Sn and 208Pb.
复制标题
120Sn 和 208Pb 中巨偶极子共振宽度的温度依赖性。
DOI：
10.1103/physrevlett.77.607
复制
发表时间：
1996
影响因子：
8.6
通讯作者：
Broglia
中科院分区：
文献类型：
--
作者：
Ormand;Bortignon;Broglia
研究了{sup 120}Sn和{sup 208}Pb中巨偶极子共振（GDR）与激发能、角动量和本征宽度的关系。对GDR强度函数的半最大值全宽度（FWHM）的理论评价与最近的实验数据进行了比较，发现总体上是一致的。在{sup 120}Sn和{sup 208}Pb之间观察到的差异归因于{sup 208}Pb在低温下偏向球形的强壳修正。在高温下，{sup 120}Sn中的FWHM受到复合核蒸发宽度的影响。{版权所有}{ital 1996美国物理学会。}
The giant-dipole resonance (GDR) in {sup 120}Sn and {sup 208}Pb is studied as a function of excitation energy, angular momentum, and intrinsic width. Theoretical evaluations of the full width at half maximum (FWHM) for the GDR strength function are compared with recent experimental data and are found to be in overall agreement. Differences observed between {sup 120}Sn and {sup 208}Pb are attributed to strong shell corrections in {sup 208}Pb favoring spherical shapes at low temperatures. At high temperature, the FWHM in {sup 120}Sn exhibits effects due to the evaporation width of the compound nucleus. {copyright} {ital 1996 The American Physical Society.}