Evolution from spherical to various deformed shapes in the odd-odd 59136Pr77 nucleus
TL;DR: In this article, the doubly odd 136Pr nucleus has been investigated via the 136Ce(p,n), 122Sn(19F,5n) and 110Pd(30Si,p3n) reactions at beam energies of 14, 84 and 125 MeV, respectively.
About: This article is published in Nuclear Physics.The article was published on 1996-06-10. It has received 17 citations till now. The article focuses on the topics: Interacting boson model & Yrast.
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TL;DR: A.A. Sonzogni et al. as discussed by the authors evaluated all nuclei with mass number A=136 and the corresponding level schemes from radioactive decay and reaction studies are presented.
25 citations
TL;DR: In this article, the doublet bands in doubly-odd nuclei were studied in terms of a pair-truncated shell model, in which the collective nucleon pairs with angular momenta of zero and two are its basic ingredients.
Abstract: The nuclear structure of the $\ensuremath{\Delta}I=1$ doublet bands in doubly-odd nuclei $^{130}\mathrm{Cs}$, $^{132}\mathrm{Cs}$, $^{132}\mathrm{La}$, and $^{134}\mathrm{La}$ is studied in terms of a pair-truncated shell model, in which the collective nucleon pairs with angular momenta of zero and two are its basic ingredients. The effective interactions consist of single-particle energies and monopole and quadrupole pairing plus quadrupole-quadrupole interactions, whose strengths are determined so as to describe the level schemes of even-even nuclei in the mass $A~130$ region. The calculation reproduces well the energy levels of the doublet bands and the electromagnetic transitions, especially the staggering of the ratios $B(M1;I\ensuremath{\rightarrow}I\ensuremath{-}1)/B(E2;I\ensuremath{\rightarrow}I\ensuremath{-}2)$ for the yrast states. Through the analysis of the wave functions, the doublet bands turn out to be made of different angular momentum configurations of an unpaired neutron and an unpaired proton, weakly coupled with the quadrupole collective excitations of the even-even part of the nucleus.
24 citations
TL;DR: In this article, a positive-parity side band with the same configuration as that of the yrast band was observed in the Pm reaction at a beam energy of 105 MeV.
Abstract: High-spin states of $^{138}\mathrm{Pm}$ have been populated using the $^{124}\mathrm{Te}(^{19}\mathrm{F},\phantom{\rule{0.28em}{0ex}}5\mathrm{n})^{138}\mathrm{Pm}$ reaction at a beam energy of 105 MeV. A new positive-parity side band with the same $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{
u}{h}_{11/2}$ configuration as that of the yrast band is observed in $^{138}\mathrm{Pm}$. The properties of the two positive-parity bands show general agreement with the fingerprints of chiral rotation and thus these two bands are suggested to be candidates for near degenerate chiral doublet bands. Besides, odd-even spin staggering of the $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{
u}{h}_{11/2}$ bands is studied systematically in odd-odd Cs, La, Pr, and Pm isotopes. As a result of this study we suggest that the spin value of lowest observed state of the yrast band be reassigned as 9 in $^{138}\mathrm{Pm}$. This new spin assignment is also supported by the argument of alignment additivity.
16 citations
TL;DR: In this paper, high-spin rotational structures in the odd-odd nuclei 130,132Pr have been studied via the 104 Pd + 32 S reaction at 160 MeV.
16 citations
TL;DR: In this paper, a simple model is applied to the yrast and yrare states based on the νh.............. 11/2 ⊗ πh�� 11 /2 configuration in the doubly-odd nuclei around the mass 130.
Abstract: A simple model is applied to the yrast and yrare states based on the νh
11/2 ⊗ πh
11/2 configuration in the doubly-odd nuclei around the mass 130. In the model, the basis state is constructed by one neutron and one proton both in the 0h
11/2 orbital, and by the collective core which couples with the two particles through a quadrupole interaction. The model reproduces quite well the overall energy levels and the electromagnetic transitions. The analysis of the yrast and yrare states reveals that the angular-momentum configuration of the neutron and the proton in the yrast states is different from that in the yrare states, when the two particles are weakly coupled with the quadrupole collective excitations of the core. The strong even-odd staggering of the ratios B(M1;I → I - 1)/B(E2;I → I - 2) for the yrast states is described by the chopsticks-like motion of two angular momenta of the neutron and the proton.
13 citations
References
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TL;DR: In this paper, a unified description of collective nuclear states in terms of a system of interacting bosons was proposed, and both the vibrational and the rotational limit can be recovered within this model.
1,093 citations
TL;DR: A compilation of experimental data on static nuclear magnetic dipole ane electric quadrupole moments for ground state and excited states of nuclides from {sup 1}H to {sup 254}Es is presented in this article.
1,038 citations
852 citations
TL;DR: In this article, the rotational limit of the interacting boson model was discussed, and the possible existence of an unbroken SU(3) symmetry was shown to be possible.
806 citations
TL;DR: In this paper, a third limit of the interacting boson model is discussed, and it is shown that this limit is associated with the group O(6) of orthogonal transformations in six dimensions.
701 citations