Octupole correlations at superdeformed shape in the HgPB region — including nonaxial components

doi:10.1016/0370-2693(92)90294-E

Physics Letters B

Volume 274, Issue 1, 2 January 1992, Pages 1-6

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Abstract

We investigate octupole correlations at strongly elongated (axis ratio close to 2:1) quadropole shapes in the HgPB region including nonaxial components of the octupole mean field. Within the cranked Strutinsky method we find the variation of octupole stiffness with rotational frequency and with the aid of cranking mass parameters we estimate octupole vibration frequencies. The strongest octupole effects are predicted due to the μ = 0 and 2 components of the octupole tensor, the estimated oscillation frequencies ranging from 1.1 to 1.6 MeV.

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Nuclear Data Sheets for A = 196
2007, Nuclear Data Sheets
The 1998 version of nuclear data sheets for A = 196 has been revised and updated on the basis of the experimental results from various decay and reaction studies before January 2006. The experimental data for all known nuclei of A = 196 (Os,Ir,Pt,Au,Hg, Tl,Pb,Bi,Po,At,Rn) have been reevaluated. The experimental methods, references,Jπ arguments,and necessary comments are given in the text. Summary band structure drawings and level schemes from both radioactive decay and reaction studies are presented. Also of special interest are the new identification of superdeformed bands in ¹⁹⁶Pb and ¹⁹⁶Bi.
Mixed representation RPA calculation for octupole excitations on superdeformed states in the 40Ca and neutron-rich sulfur regions
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By means of the mixed representation RPA based on the Skyrme–Hartree–Fock mean field, we investigate low-frequency octupole excitations built on the superdeformed (SD) states in the $N = Z$ nuclei around ⁴⁰Ca and the neutron-rich sulfur isotopes. The RPA calculation is carried out fully self-consistently on the three-dimensional Cartesian mesh in a box, and yields a number of low-frequency octupole vibrations built on the SD states in ³²S, ³⁶Ar, ⁴⁰Ca and ⁴⁴Ti. In particular, a strongly collective $K^{π} = 1^{-}$ octupole vibration is suggested to appear on top of the SD state in ⁴⁰Ca. For ^48,50S close to the neutron drip line, we find that the low-lying state created by the excitation of a single neutron from a loosely bound low Ω level to a high Ω resonance level acquires an extremely strong octupole transition strength due to the spatially very extended structure of the particle–hole wave functions.
Nuclear data sheets for a = 196
1998, Nuclear Data Sheets
The 1995 version of nuclear data sheets for A=196 has been revised. The experimental data for all known nuclei of A=196 (Os, Ir, Pt, Au, Hg, Tl, Pb, Bi, Po, At, Rn) have been reevaluated. Summary band structure drawings and level schemes from both radioactive decay and reaction studies are presented. Associated spectroscopic data and adopted properties for levels and γ rays are given in tables. Also of special interest are the new identification of a superdeformed band and of a two-particle-two-hole-intruder state in¹⁹⁶Pb.
Quadrupole and octupole correlations in normal, superdeformed and hyperdeformed states of 194Pb
1995, Nuclear Physics, Section A
Quadrupole and octupole correlations in ¹⁹⁴Pb are investigated by means of the generator coordinate method. Static microscopic wave functions are obtained by constrained Hartree-Fock+BCS calculations using the effective interaction SkM^∗. Quadrupole deformations from ground state to hyperdeformation region are included. Superdeformed band heads of both parities are predicted. The depopulation of the even superdeformed band is calculated. The odd-parity superdeformed band slowly decays to the ground even-parity superdeformed band over many E1 transitions.
Octupole correlations in excited bands of superdeformed 152Dy
1995, Physics Letters B
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The N = 7 unfavoured superdeformed band in 193Hg; coriolis splitting and neutron shell structure at extreme deformation
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A new superdeformed band is reported in ¹⁹³Hg which has properties that are consistent with it being based on the unfavoured $N = 7 (π, α) = (−, + 12)$ intruder orbital. The signature splitting at $h ̵ ω = 200 keV$ of this intruder orbital and its favoured (−, − $12$ ) partner is estimated to be 160±30 keV, which is in agreement with cranked mean field calculations. This band completes the set of low-lying quasi-neutron orbitals predicted to be at the N = 113 superdeformed Fermi-surface. The previously known superdeformed bands in ¹⁹³Hg have been extended to higher rotational frequencies, $h ̵ ω ⩾ 0.40 MeV$ .

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¹: On leave of absence from the Soltan Institute for Nuclear Studies, PL-00 681 Warsaw, Poland.

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Physics Letters B

Abstract

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Cited by (31)

Nuclear Data Sheets for A = 196

Mixed representation RPA calculation for octupole excitations on superdeformed states in the <sup>40</sup>Ca and neutron-rich sulfur regions

Nuclear data sheets for a = 196

Quadrupole and octupole correlations in normal, superdeformed and hyperdeformed states of <sup>194</sup>Pb

Octupole correlations in excited bands of superdeformed <sup>152</sup>Dy

The N = 7 unfavoured superdeformed band in <sup>193</sup>Hg; coriolis splitting and neutron shell structure at extreme deformation