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Multiple β - Decaying states in 194Re: Shape evolution in neutron-rich osmium isotopes

Al-Dahan, N, Regan, PH, Podolyák, Z, Walker, PM, Alkhomashi, N, Dracoulis, GD, Farrelly, G, Benlliure, J, Pietri, SB, Casten, RF, Stevenson, PD, Gelletly, W, Steer, SJ, Garnsworthy, AB, Casarejos, E, Gerl, J, Wollersheim, HJ, Grebosz, J, Górska, M, Kojouharov, I, Schaffner, H, Algora, A, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Cullen, IJ, Denis Bacelar, AM, Deo, AY, Estevez, ME, Fujita, Y, Hoischen, R, Kumar, R, Lalkovski, S, Liu, Z, Mason, PJ, Mihai, C, Molina, F, Mücher, D, Rubio, B, Tamii, A, Tashenov, S, Valiente-Dobón, JJ and Woods, PJ (2012) Multiple β - Decaying states in 194Re: Shape evolution in neutron-rich osmium isotopes Physical Review C - Nuclear Physics, 85 (3), 034301.

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Abstract

decays from heavy, neutron-rich nuclei with A∼190 have been investigated following their production via the relativistic projectile fragmentation of an E/A=1 GeV 208Pb primary beam on a ∼2.5 g/cm2 9Be target. The reaction products were separated and identified using the GSI FRagment Separator (FRS) and stopped in the RISING active stopper. γ decays were observed and correlated with these secondary ions on an event-by-event basis such that γ-ray transitions following from both internal (isomeric) and β decays were recorded. A number of discrete, β-delayed γ-ray transitions associated with β decays from 194Re to excited states in 194Os have been observed, including previously reported decays from the yrast Iπ=(6+) state. Three previously unreported γ-ray transitions with energies 194, 349, and 554 keV are also identified; these transitions are associated with decays from higher spin states in 194Os. The results of these investigations are compared with theoretical predictions from Nilsson multi-quasiparticle (MQP) calculations. Based on lifetime measurements and the observed feeding pattern to states in 194Os, it is concluded that there are three β−-decaying states in 194Re.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Al-Dahan, NUNSPECIFIEDUNSPECIFIED
Regan, PHUNSPECIFIEDUNSPECIFIED
Podolyák, ZUNSPECIFIEDUNSPECIFIED
Walker, PMUNSPECIFIEDUNSPECIFIED
Alkhomashi, NUNSPECIFIEDUNSPECIFIED
Dracoulis, GDUNSPECIFIEDUNSPECIFIED
Farrelly, GUNSPECIFIEDUNSPECIFIED
Benlliure, JUNSPECIFIEDUNSPECIFIED
Pietri, SBUNSPECIFIEDUNSPECIFIED
Casten, RFUNSPECIFIEDUNSPECIFIED
Stevenson, PDUNSPECIFIEDUNSPECIFIED
Gelletly, WUNSPECIFIEDUNSPECIFIED
Steer, SJUNSPECIFIEDUNSPECIFIED
Garnsworthy, ABUNSPECIFIEDUNSPECIFIED
Casarejos, EUNSPECIFIEDUNSPECIFIED
Gerl, JUNSPECIFIEDUNSPECIFIED
Wollersheim, HJUNSPECIFIEDUNSPECIFIED
Grebosz, JUNSPECIFIEDUNSPECIFIED
Górska, MUNSPECIFIEDUNSPECIFIED
Kojouharov, IUNSPECIFIEDUNSPECIFIED
Schaffner, HUNSPECIFIEDUNSPECIFIED
Algora, AUNSPECIFIEDUNSPECIFIED
Benzoni, GUNSPECIFIEDUNSPECIFIED
Blazhev, AUNSPECIFIEDUNSPECIFIED
Boutachkov, PUNSPECIFIEDUNSPECIFIED
Bruce, AMUNSPECIFIEDUNSPECIFIED
Cullen, IJUNSPECIFIEDUNSPECIFIED
Denis Bacelar, AMUNSPECIFIEDUNSPECIFIED
Deo, AYUNSPECIFIEDUNSPECIFIED
Estevez, MEUNSPECIFIEDUNSPECIFIED
Fujita, YUNSPECIFIEDUNSPECIFIED
Hoischen, RUNSPECIFIEDUNSPECIFIED
Kumar, RUNSPECIFIEDUNSPECIFIED
Lalkovski, SUNSPECIFIEDUNSPECIFIED
Liu, ZUNSPECIFIEDUNSPECIFIED
Mason, PJUNSPECIFIEDUNSPECIFIED
Mihai, CUNSPECIFIEDUNSPECIFIED
Molina, FUNSPECIFIEDUNSPECIFIED
Mücher, DUNSPECIFIEDUNSPECIFIED
Rubio, BUNSPECIFIEDUNSPECIFIED
Tamii, AUNSPECIFIEDUNSPECIFIED
Tashenov, SUNSPECIFIEDUNSPECIFIED
Valiente-Dobón, JJUNSPECIFIEDUNSPECIFIED
Woods, PJUNSPECIFIEDUNSPECIFIED
Date : 2012
Identification Number : 10.1103/PhysRevC.85.034301
Additional Information : Copyright 2012 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 09 May 2012 13:48
Last Modified : 23 Sep 2013 19:27
URI: http://epubs.surrey.ac.uk/id/eprint/532653

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