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beta(-)-delayed spectroscopy of neutron-rich tantalum nuclei: Shape evolution in neutron-rich tungsten isotopes

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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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
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmail
Alkhomashi, NUNSPECIFIED
Regan, PHUNSPECIFIED
Podolyak, ZUNSPECIFIED
Pietri, SUNSPECIFIED
Garnsworthy, ABUNSPECIFIED
Steer, SJUNSPECIFIED
Benlliure, JUNSPECIFIED
Caserejos, EUNSPECIFIED
Casten, RFUNSPECIFIED
Gerl, JUNSPECIFIED
Wollersheim, HJUNSPECIFIED
Grebosz, JUNSPECIFIED
Farrelly, GUNSPECIFIED
Gorska, MUNSPECIFIED
Kojouharov, IUNSPECIFIED
Schaffner, HUNSPECIFIED
Algora, AUNSPECIFIED
Benzoni, GUNSPECIFIED
Blazhev, AUNSPECIFIED
Boutachkov, PUNSPECIFIED
Bruce, AMUNSPECIFIED
Bacelar, AMDUNSPECIFIED
Cullen, IJUNSPECIFIED
Caceres, LUNSPECIFIED
Doornenbal, PUNSPECIFIED
Estevez, MEUNSPECIFIED
Fujita, YUNSPECIFIED
Gelletly, WUNSPECIFIED
Hoischen, RUNSPECIFIED
Kumar, RUNSPECIFIED
Kurz, NUNSPECIFIED
Lalkovski, SUNSPECIFIED
Liu, ZUNSPECIFIED
Mihai, CUNSPECIFIED
Molina, FUNSPECIFIED
Morales, AIUNSPECIFIED
Mucher, DUNSPECIFIED
Prokopowicz, WUNSPECIFIED
Rubio, BUNSPECIFIED
Shi, YUNSPECIFIED
Tamii, AUNSPECIFIED
Tashenov, SUNSPECIFIED
Valiente-Dobon, JJUNSPECIFIED
Walker, PMUNSPECIFIED
Woods, PJUNSPECIFIED
Xu, FRUNSPECIFIED
Date : December 2009
Identification Number : 10.1103/PhysRevC.80.064308
Uncontrolled Keywords : RELATIVISTIC HEAVY-IONS, ISOMER SPECTROSCOPY, ATOMIC-NUCLEI, STATES, FRAGMENTATION, O(6), W-190(116), STABILITY, SYMMETRY, PT-196
Depositing User : Symplectic Elements
Date Deposited : 09 Nov 2011 11:50
Last Modified : 23 Sep 2013 18:48
URI: http://epubs.surrey.ac.uk/id/eprint/7544

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