Parity Unfavoredness and the Distribution of Photofragments

Abstract

The angular distribution of photodisintegration products, previously resolved into contributions with different angular momentum transfers ${\overrightarrow{\mathrm{j}}}_t={\overrightarrow{\mathrm{j}}}_{\gamma }-1\mathrm{}$, is analyzed further according to the parity of $j_t$. Odd values of $j_t+j_{\gamma }+l$ correspond to parity-unfavored transitions which result from effectively pseudotensor interactions with the unobserved fragments. In electric dipole processes, these transitions yield an angular distribution with the fixed asymmetry parameter ${\beta }_{\mathrm{unf}}=-1\mathrm{}$ while the distribution of parity-favored transitions consists of three standard functions weighted by dynamical factors.