beta(-)-delayed spectroscopy of neutron-rich tantalum nuclei: Shape evolution in neutron-rich tungsten isotopes
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Alkhomashi, N, Regan, PH, Podolyak, Z, Pietri, S, Garnsworthy, AB, Steer, SJ, Benlliure, J, Caserejos, E, Casten, RF, Gerl, J, Wollersheim, HJ, Grebosz, J, Farrelly, G, Gorska, M, Kojouharov, I, Schaffner, H, Algora, A, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Bacelar, AMD, Cullen, IJ, Caceres, L, Doornenbal, P, Estevez, ME, Fujita, Y, Gelletly, W, Hoischen, R, Kumar, R, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Morales, AI, Mucher, D, Prokopowicz, W, Rubio, B, Shi, Y, Tamii, A, Tashenov, S, Valiente-Dobon, JJ, Walker, PM, Woods, PJ and Xu, FR (2009) beta(-)-delayed spectroscopy of neutron-rich tantalum nuclei: Shape evolution in neutron-rich tungsten isotopes PHYS REV C, 80 (6). ? - ?. ISSN 0556-2813
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Official URL: http://dx.doi.org/10.1103/PhysRevC.80.064308
Abstract
The low-lying structure of 188,190,192Whave been studied following beta-decays of the neutron-rich mother nuclei 188,190,192Ta, produced following the projectile fragmentation of a 1 GeV per nucleon 208Pb primary beam on a natural Be target at the GSI Fragment Separator. The beta-decay half lives of 188,190,192Ta have been measured, together with gamma-ray decays of low-lying states in their respective W daughter nuclei using heavy-ion-beta-gamma correlations utilising a position sensitive silicon detector set-up. The data provide information on the low-lying excited states in 188,190,192W, which highlight a change in nuclear shape at 190W compared with lighter W isotopes. This evolution of ground state structure along the W isotopic chain is discussed as evidence for a possible proton sub-shell effect for the A 190 region and is consistent with the maximisation of the -softness of the nuclear potential around N 116.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RELATIVISTIC HEAVY-IONS, ISOMER SPECTROSCOPY, ATOMIC-NUCLEI, STATES, FRAGMENTATION, O(6), W-190(116), STABILITY, SYMMETRY, PT-196 |
| Divisions: | Faculty of Engineering and Physical Sciences > Physics |
| ID Code: | 7544 |
| Deposited By: | Symplectic Elements |
| Deposited On: | 09 Nov 2011 11:50 |
| Last Modified: | 24 Jan 2013 09:14 |
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