Superdeformed shapes and configurations in thallium nuclei

Reviol, W.; Mueller, W. F.; Riedinger, L. L.; Smith, Bradley H.; Carpenter, M. P.; Fischer, S. M.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Nisius, D.; Seweryniak, D.; Moore, E. F.

doi:10.1016/s0375-9474(97)00782-3

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…This work confirmed that the strongly coupled bands resulted from the occupation of the [642] 5 2 proton orbital, which originates from the i 13/2 sub-shell. Evidence for this orbital at SD shapes has subsequently been found in 191,193 Tl using similar methods [109,110].…”

Section: G-factor Resultsmentioning

confidence: 68%

“…Cranked Nilsson-Strutinsky (CNS) calculations without pairing suggest that these structures have relatively pure wavefunctions, a feature which results from the fact that the bands are energetically favoured and consequently, for a given parity and signature, are yrast over almost their entire spin range. The first example of this type of behaviour in a heavy nucleus was found in 109 Sb [141] and interpreted by Ragnarsson et al [142]. Both types of band termination have been discussed in detail in an excellent review article devoted to this topic by Afanasjev et al [143].…”

Section: Introductionmentioning

confidence: 93%

“…In this nucleus the yrast positive-parity band has been extended up to a spin of 52h and a structure based on a π[(g 9/2 ) −2 (d 5/2 , g 7/2 ) 4 (h 11/2 ) 2 ]⊗ν[(d 5/2 , g 7/2 ) 6 (h 11/2 ) 4 ] configuration, relative to a 100 Sn core, has been assigned following comparisons with CNS calculations. Many related structures, 107 In, 108 Sn, 109 Sb, 110 Te. The lower panels show the calculated configurations with the terminating states encircled.…”

Section: The a ∼ 110 Mass Regionmentioning

confidence: 99%

“…Figure 8. Comparison of experimental and theoretical level energies minus a rotating liquid drop energy versus spin curves for smooth terminating bands in the N = 58 nuclei107 In,108 Sn,109 Sb,110 Te. The lower panels show the calculated configurations with the terminating states encircled.…”

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confidence: 99%

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The influence of microscopic structures on rotational motion in nuclei

Wadsworth

Nolan

2002

Rep. Prog. Phys.

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This paper will concentrate on a study of the role and influence of microscopic structures on the properties of rotational bands in nuclei. Collective rotational features are well known in nuclei. Much of the review will discuss examples taken from experimental investigations of highly/superdeformed structures and their theoretical interpretation, which provide some of best and clearest rotational phenomena observed in nuclei. These structures have welldefined rotational properties that can be described by a collective model. The link between the deformation of these structures and the valence particle configuration has been established in many nuclei and recent experimental data are presented. Detailed investigations with new, very sensitive, instrumentation have revealed some extremely interesting and unexpected phenomena, such as the observation of identical rotational bands in neighbouring nuclei and energy staggering between adjacent states within a single band. The experimental and theoretical aspects of these new features will be discussed. The spectroscopy of highly/superdeformed structures has been studied extensively and many bands observed in a given nucleus which arise from particle-hole excitations. Measurements are now available, through the strength of magnetic dipole transitions, of the properties of specific single-particle orbitals. In the medium mass (A ∼ 60) region highly deformed states have been observed to decay by both proton and alpha emission in addition to the normal γ -decay mode. The decay widths, which are retarded for these channels, are related to the microscopic structures of the states involved. Investigations of rotational motion in exotic triaxial and hyperdeformed nuclear shapes are also reviewed. Recent work on 'smooth band termination', in medium to medium-heavy nuclei, which results when a deformed collectively rotating nucleus gradually changes from a near-prolate to a non-collective oblate shape, has revealed detailed information on the configurations responsible and the effects on the bands as the spin contribution is exhausted. The concept of 'magnetic rotation', which gives rise to regular 'rotational-like' sequences of states in nuclei that are almost spherical, is discussed. This phenomenon is also found to primarily result from microscopic effects within the nucleus. A discussion of these two latter phenomena has been included in this paper, since they provide an important contribution to the topic under review.

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