THEORY OF EXCHANGE RELAXATION OF HYPERFINE STRUCTURE IN ELECTRON SPIN RESONANCE
THEORY OF EXCHANGE RELAXATION OF HYPERFINE STRUCTURE IN ELECTRON SPIN RESONANCE
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DOI：
10.1103/physrev.126.1995
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发表时间：
1962-01-01
期刊：
影响因子：
--
通讯作者：
CURRIN, JD
中科院分区：
文献类型：
--
作者：
CURRIN, JD
碰撞分子之间的电子自旋交换相互作用被检查作为一个可能的松弛机制的超精细结构的自由基分子在溶液中。导出的表达式，在适当的条件下，涉及的频率依赖的磁化率的一个单一的参数q，它可以被解释为自旋交换的频率。对于大的q值，吸收变窄到宽度为σ 2 q的单条线，其中σ是未扰动光谱的均方宽度。对于小的q值的宽度的个别超精细线被发现取决于它们的相对强度。这些结果与最近的一些实验进行了比较。
The electron spin exchange interaction between colliding molecules is examined as a possible relaxation mechanism for the hyperfine structure of free-radical molecules in solution. An expression is derived which, under suitable conditions, relates the frequency-dependent susceptibility to a single parameter q, which can be interpreted as the frequency of spin exchanges. For large values of q the absorption narrows to a single line of width σ 2 q, where σ is the mean square width of the unperturbed spectrum. For small values of q the widths of the individual hyperfine lines are found to depend upon their relative intensities. These results are compared with some recent experiments.