We introduce the concept of neutron-proton two-particle units (np-Weisskopf units) to be used in the analysis of the (³He,p) and $(p,{}^3$He) reactions on nuclei along the N=Z line. These are presented for the conditions relevant to the $(n,j,\ell$) orbits expected from ¹⁶O to ¹⁰⁰Sn. As is the case of the Weisskopf units for electromagnetic transitions, the np-WU's will provide a simple, yet robust, measure of isoscalar and isovector np pairing collective effects.

中文翻译：

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中子-质子对转移反应和相应的 Weisskopf 型单元

我们介绍的中子-质子两粒子单元的概念（NP -Weisskopf单位）在（分析中使用³赫，p）和$(p,{}^3$He) 核上沿 N=Z 线的反应。这些是针对相关条件提出的$(n,j,\ell$) 轨道预计从¹⁶ O 到¹⁰⁰ Sn。与用于电磁跃迁的 Weisskopf 单元的情况一样，np -WU 将提供一种简单而稳健的等标量和等向量np配对集体效应的度量。