Collectivity of dipole bands inPb196
| Autor: | B. Fornal, R. G. Henry, H.L. Harrington, R. H. Mayer, D. T. Nisius, M. P. Carpenter, Iftikhar Ahmad, T. L. Khoo, U. Garg, Ian Gardner Bearden, T. Lauritsen, M.W. Drigert, R. V. F. Janssens, E. F. Moore, W. Reviol, Y. Liang, Z. W. Grabowski, P. J. Daly, Michele Sferrazza |
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| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | Physical Review C. 51:115-124 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.51.115 |
| Popis: | The region of nuclei with mass {approximately} 190 was studied extensively over the last few years following the discovery of superdeformation in {sup 190}Hg. More recently, considerable interest in the neutron-deficient Pb isotopes developed with the discover of a number of bands at high spin connected by dipole transitions in both even {sup 192-200}Pb and odd {sup 197-201}Pb nuclei. The majority of the dipole bands are regular in character (i.e. transition energies increase smoothly with spin) while the remaining bands are referred to as irregular in character, due to the fact that the transition energies do not increase smoothly with spin. The properties of the dipole bands were interpreted in terms of high-K, moderately-deformed oblate states built on configurations involving high-J, shape-driving quasiproton excitations coupled to rotation-aligned quasineutrons. It was suggested that the difference between the regular and irregular dipole sequences is related to the deformation where the irregular sequences are thought to be less collective than their regular counterparts. |
| Databáze: | OpenAIRE |
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