| Autor: |
F. M. Clikeman, M. G. Stewart |
| Rok vydání: |
1960 |
| Předmět: |
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| Zdroj: |
Physical Review. 117:1052-1055 |
| ISSN: |
0031-899X |
| DOI: |
10.1103/physrev.117.1052 |
| Popis: |
The gamma-gamma directional correlation of the 356-82-kev cascade in ${\mathrm{Cs}}^{133}$ was measured. The directional correlation coefficients were $\frac{{A}_{2}}{{A}_{0}}=0.031\ifmmode\pm\else\textpm\fi{}0.006$ and $\frac{{A}_{4}}{{A}_{0}}=\ensuremath{-}0.006\ifmmode\pm\else\textpm\fi{}0.010$. This is consistent with a spin assignment $\frac{1}{2}(Q)\frac{5}{2}(D+Q)\frac{7}{2}$. The ratio of the $E2$ to $M1$ matrix elements for the 82-kev transition is $\ensuremath{\delta}=\ensuremath{-}0.139\ifmmode\pm\else\textpm\fi{}0.007$. The $M1$ transition is retarded by a factor of \ensuremath{\sim}700 and the $E2$ transition is enhanced by a factor of \ensuremath{\sim}20, compared to single particle transitions. The retardation of the $M1$ transition is consistent with the assignment $d\frac{5}{2}$ for the 82-kev state and $g\frac{7}{2}$ for the ground state which would make the $M1$ transition $l$ forbidden. The enhancement of the $E2$ transition indicates there is a cooperative phenomenon present. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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