A program for calculating gamma-gamma directional correlation coefficients and angular distribution coefficients for gamma rays of mixed multipolarities from partially aligned nuclei

Title of program: THDST
Catalogue Id: ABPG_v2_0 [ABMZ]

Nature of problem
Conservation of angular momentum governs the multipolarity of electromagnetic transitions between nuclear excited states. In certain cases, a mixture of two multipolarities may occur in a single transition. The amount of mixing ,i.e., the mixing ratio, is determined by the structure of the nuclear levels involved. The most probable mixing ratio can be determined by accurately measuring the directional correlation between two transitions or the angular distribution of a gamma ray with respect to ...

Versions of this program held in the CPC repository in Mendeley Data
ABPG_v1_0; ANGCOR; 10.1016/0010-4655(76)90041-2
ABPG_v2_0; THDST; 10.1016/0010-4655(78)90085-1

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

程序名称：THDST
目录编号：ABPG_v2_0 [ABMZ]

问题实质
角动量守恒决定了核激发态（nuclear excited states）之间电磁跃迁（electromagnetic transitions）的多极性。在部分情形下，单次跃迁可存在两种多极性的混合。该混合程度，即混合比（mixing ratio），由所涉核能级的结构决定。通过精准测量两次跃迁间的方向关联（directional correlation），或是γ射线（gamma ray）相对于……的角分布（angular distribution），即可确定最可几混合比。

本程序收录于Mendeley数据的CPC程序库中的版本包括：
ABPG_v1_0; ANGCOR; 10.1016/0010-4655(76)90041-2
ABPG_v2_0; THDST; 10.1016/0010-4655(78)90085-1

本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2018年）