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Observation of parity doublets in the odd-odd nucleus220Ac |
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| Authors: | N. Schulz V. R. Vanin M. Aïche Ch. Briançon A. Chevallier J. Chevallier M. E. Debray A. J. Kreiner E. Ruchowska J. C. Sens |
| Affiliation: | 1. Centre de Recherches Nucléaires, IN2P3-CNRS/Université Louis Pasteur, BP 20, F-67037, Strasbourg, France 2. Instituto de Fisica da Universidade de Sao Paulo, 01498, Sao Paulo, Brazil 3. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, F-91405, Orsay, France 4. Departamento de Fisica, Comision Nacional de Energia Atomica, RA-1429, Buenos Aires, Argentina 5. Institute of Experimental Physics, Warsaw University, PL-00-681, Warsaw, Poland |
| Abstract: | Excited states of220Ac have been investigated by means of the209Bi(14C,3n) reaction and using the “Château de Cristal” gamma ray facility. The observation of bands with alternating parity states reveals the reflection asymmetric nuclear shape of220Ac. The extracted B(E1)/B(E2) ratios display a clear spin dependence. |
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