Shape coexistence in neutron-deficient Hg isotopes studied via lifetime measurements in 184,186Hg and two-state mixing calculations

Gaffney, Liam; Hackstein, M; Page, RD; Grahn, T; Scheck, M; Butler, PA; Bertone, PF; Bree, Nick; Carroll, RJ; Carpenter, MP; Chiara, CJ; Dewald, A; Filmer, F; Fransen, C; Huyse, Mark; Janssens, RVF; Joss, DT; Julin, R; Kondev, FG; Nieminen, P; Pakarinen, J; Rigby, SV; Rother, W; Van Duppen, Piet; Watkins, HV; Wrzosek-Lipska, Kasia; Zhu, S

doi:10.1103/PhysRevC.89.024307

Shape coexistence in neutron-deficient Hg isotopes studied via lifetime measurements in 184,186Hg and two-state mixing calculations

Author:

Gaffney, Liam

Hackstein, M ; Page, RD ; Grahn, T ; Scheck, M ; Butler, PA ; Bertone, PF ; Bree, Nick ; Carroll, RJ ; Carpenter, MP ; Chiara, CJ ; Dewald, A ; Filmer, F ; Fransen, C ; Huyse, Mark ; Janssens, RVF ; Joss, DT ; Julin, R ; Kondev, FG ; Nieminen, P ; Pakarinen, J ; Rigby, SV ; Rother, W ; Van Duppen, Piet ; Watkins, HV ; Wrzosek-Lipska, Kasia ; Zhu, S

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, LIGHT MERCURY ISOTOPES, DECAY CURVE METHOD, HIGH-SPIN STATES, ALPHA-DECAY, NUCLEI, SHIFT, HG-184, BAND, TRANSITION, DEFORMATIONS, nucl-ex, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

Abstract:

The neutron-deficient mercury isotopes, 184,186Hg, were studied with the recoil distance Doppler-shift method using the Gammasphere array and the Köln plunger device. The differential decay curve method was employed to determine the lifetimes of the yrast states in 184,186Hg. An improvement on previously measured values of yrast states up to 8+ is presented as well as first values for the 9_{3} state in 184Hg and 10+ state in 186Hg. B(E2) values are calculated and compared to a two-state mixing model which utilizes the variable moment of inertia model, allowing for extraction of spin-dependent mixing strengths and amplitudes.