| Autor: |
F. Ingebretsen, G.B. Hagemann, M. Piiparinen, T. Lönnroth, S. J. Freeman, H. Schnack-Petersen, R.A. Bark, Henrik Jeldtoft Jensen, H. Carlsson, Ingemar Ragnarsson, H. Ryde, P.B. Semmes, P.O. Tjøm |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Nuclear Physics A. 630:603-630 |
| ISSN: |
0375-9474 |
| Popis: |
Six rotational bands in the odd-odd nucleus 174Ta have been populated with the 160Gd(19F,5n) reaction. High-spin states were identified using the NORDBALL array. Both signatures of the doubly decoupled π 1 2 − [541] ⊗ ν 1 2 − [521] band and semi-decoupled π 1 2 − [541] ⊗ ν 7 2 − [633] band are observed, in addition to the high-K couplings of the π 9 2 − [514] ⊗ ν 7 2 + [633] , π 9 2 − [514] ⊗ ν 5 2 − [512] , π 7 2 + [404] ⊗ ν 7 2 + [633] , and π 5 2 + [402] ⊗ ν 5 2 − [512] configurations. The signature splitting of the π 1 2 − [541] ⊗ ν 7 2 + [633] band is inverted from the expected splitting, and this is interpreted as being due to a residual proton-neutron interaction. It is shown empirically that this interaction, together with deformation changes, can account for the increased crossing frequency associated with the alignment of i 13 2 neutrons in the π 1 2 − [541] bands of odd-Z nuclei. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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