Nearby Doorways, Parity Doublets and Parity Mixing in Compound Nuclear States

Details Nearby Doorways, Parity Doublets and Parity Mixing in Compound Nuclear States Nearby Doorways, Parity Doublets and Parity Mixing in Compound Nuclear States

1994-08-28

arxiv.org/abs/nucl-th/9408027v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, REVTEX

Scientific paper

10.1103/PhysRevLett.74.2638

We discuss the implications of a doorway state model for parity mixing in compound nuclear states. We argue that in order to explain the tendency of parity violating asymmetries measured in $^{233}$Th to have a common sign, doorways that contribute to parity mixing must be found in the same energy neighbourhood of the measured resonance. The mechanism of parity mixing in this case of nearby doorways is closely related to the intermediate structure observed in nuclear reactions in which compound states are excited. We note that in the region of interest ($^{233}$Th) nuclei exhibit octupole deformations which leads to the existence of nearby parity doublets. These parity doublets are then used as doorways in a model for parity mixing. The contribution of such mechanism is estimated in a simple model.

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