| Autor: |
T. Czosnyka, M. Devlin, B. Kotlinski, J. R. Hughes, R. J. Poynter, R.A. Cunningham, D. L. Watson, K. G. Helmer, E.G. Vogt, D. Cline, C. Y. Wu, P. H. Regan, A.E. Kavka, T. H. Hoare, N. Clarkson, P. A. Butler, R. Wadsworth, C. A. White, R. Ibbotson, G. D. Jones |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Physical Review Letters. 71:1990-1993 |
| ISSN: |
0031-9007 |
| DOI: |
10.1103/physrevlett.71.1990 |
| Popis: |
E3 matrix elements have been determined for transitions between states up to ${\mathit{I}}^{\mathrm{\ensuremath{\pi}}}$=${13}^{\mathrm{\ensuremath{-}}}$ in $^{148}\mathrm{Nd}$, providing direct evidence for strong octupole collectivity in a rotational band. These values, as well as the corresponding E1 and E2 matrix elements, were obtained from Coulomb excitation data using $^{58}\mathrm{Ni}$ and $^{92}\mathrm{Mo}$ ions, projectile excitation using a $^{208}\mathrm{Pb}$ target, and from recoil distance lifetime measurements. The results are consistent with collective model predictions for $^{148}\mathrm{Nd}$ assuming intrinsic quadrupole and octupole moments of ${\mathit{Q}}_{20}$\ensuremath{\approxeq}400 e ${\mathrm{fm}}^{2}$ and ${\mathit{Q}}_{30}$\ensuremath{\approxeq}1500 e ${\mathrm{fm}}^{3}$. The E3 strength coupling the negative-parity states to the \ensuremath{\beta} band is found to be appreciable. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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