Population of yrast states in¹⁹¹Os using deep-inelastic reactions

Abstract

Several nuclei in the A ∼ 190 region have been studied following deep-inelastic reactions using a 460 MeV 82 Se projectile impinging upon a thick 192 Os target. The GASP array (at the Legnaro National Laboratory in Italy) was used to measure the resulting γ-decays. The previously reported near-yrast structure of 191 Os is extended to a t 1 2 = 61 ns isomer, at an energy of 2640 keV. Branching ratios for I = 1 and I = 2 transitions in the K π = 11

Nuclear g factors and structure of high-spin isomers in 190,192,194Pt and 196,198Hg

“…A procedure similar to that used for 194 Pt with Eqs. (13) and (14) gives the following results: S = 0.36(6)), I = 2.8(5) for the 10 + → 8 + transition and S = −0.26 (20), I = 3.8(5) for the 3 + → 2 + transition. Calculation with Eq.…”

“…Such a level sequence is not usual for the (νi −2 13/2 ) configuration and therefore the 10 + level in 194 Pt was suggested to have a (πh −2 11/2 ) configuration [5,7]. In recent publications the 10 + state is interpreted as a (νi −2 13/2 ) aligned quasiparticle state [20]. The experimental g factors can easily distinguish between the two possibilities because of the large differences in value and sign: about +1.2 for a π 11/2 configuration and about −0.16 for a νi 13/2 one.…”

Rotation-aligned isomer and oblate collectivity inPt196

“…In 194 Pt, this sequence is less regular, and the observation is attributed to decreased collectivity [9]. [10].…”

Configuration dependence ofK-forbidden transition rates from three-quasiparticle isomers

“…In contrast to the situation for 2-quasiparticle isomers, there are many new f ν values for 3-quasiparticle isomers [10,11,[16][17][18][19][20][21][22][23][24][25][26][27]. and what appears to be the simplest analysis is now presented.…”