Anisotropic angular correlation between theγrays and theKx rays following internal conversion inTm169

Abstract
The angular distribution of K x rays emitted following K conversion has been investigated theoretically. It is shown that the static nuclear quadrupole moment may sufficiently perturb the innermost electron shell to cause anisotropy in the angular distribution between the K x rays and the coincident γ rays, as suggested by Sen and subsequently confirmed experimentally by Sen, Salie, and Tomchuk.