Evidence for shape coexistence in odd-mass rhodium nuclei

Rogowski, J.; Kaffrell, Ν.; Frenne, D. De; Heyde, K.; Jacobs, E.; Harakeh, Mohsen; Schippers, J.M.; Werf, S.Y. van der

doi:10.1016/0370-2693(88)91402-5

Cited by 16 publications

(5 citation statements)

References 11 publications

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“…and B(E2; 7/2 + → 3/2 + )=136(5) W.u. confirm the enhanced collectivity indicated by previous measurements [57,59,60], lending support to the large deformations suggested in prior studies of the nearby isotopes [44,45,54,58]. These B(E2) values are among the largest in the region [79], comparable to those observed in the strongly-deformed bands found in the Z≤42 isotopes [22,28,29,31,37,38].…”

Section: Resultssupporting

confidence: 90%

“…However, such an idea about the occurrence of triaxiality and its role in shape-coexisting mass regions may not be complete, especially considering past measurements of shape coexistence in the Z>42 region, particularly in odd-mass isotopes, combined now with the recent experimental and theoretical works mentioned above pertaining to the isotopes at lower Z. Despite the apparent regularity of triaxiality above Mo, shape coexistence does remain an important feature in the low energy structure of Tc [53][54][55][56], Rh [44,[57][58][59], Ag [60], In [61,62] and to a lesser extent, the even-even isotopes of Ru [63,64], Pd [65], and Cd [66]. As discussed by Heyde and Wood [11], many have attributed this, perhaps erroneously, to specific, deformation-driving single-particle orbitals crossing the Z=50 shell gap, so-called intruder orbitals.…”

Section: Introductionmentioning

confidence: 99%

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New insights into triaxiality and shape coexistence from odd-mass Rh109

et al. 2018

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Rapid shape evolutions near A=100 are now the focus of much attention in nuclear science. Much of the recent work has been centered on isotopes with Z≤40, where the shapes are observed to transition between near-spherical to highly-deformed with only a single pair of neutrons added. At higher Z, the shape transitions become more gradual as triaxiality sets in, yet the coexistence of varying shapes continues to play an important role in the low-energy nuclear structure, particularly in the odd-Z isotopes. This work aims to characterize competing shapes in the triaxial region between Zr and Sn isotopes using ultra-fast timing techniques to measure lifetimes of excited states in the neutron-rich nucleus, 109 Rh. The measurements confirm the persistence at higher-Z of similarlylarge deformations observed near Z=40. Moreover, we show that new self-consistent mean-field calculations, with proper treatment of the odd nucleon, are able to reproduce the coexisting triaxial and highly-deformed configurations revealing, for the first time, the important contribution of the unpaired nucleon to these different shapes based on the blocking of specific single-particle orbitals.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

New insights into triaxiality and shape coexistence from odd-mass Rh109

et al. 2018

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“…Guided by the observation of the 2p − 2h and 2p − 4h intruder states in the Sn and Cd isotopes, respectively, and the presence of deformed bands in the odd-A Ag and Rh isotopes (see, e.g., Refs. [411][412][413][414][415]), suggestions were made that such structures appear in the Pd isotopes as well [416][417][418]. Recent studies [419] of 106 Pd using the (n, n γ) reaction have measured a large number of level lifetimes and significantly expanded the level scheme.…”

Section: Pd Isotopesmentioning

confidence: 99%