Evolution of Collectivity in Kr72 : Evidence for Rapid Shape Transition

Iwasaki, H.; Lemasson, A.; Morse, C.; Dewald, A.; Braunroth, T.; Bader, V. M.; Baugher, T.; Bazin, D.; Berryman, J. S.; Campbell, C. M.; Gade, A.; Langer, C.; Lee, I. Y.; Loelius, C.; Lunderberg, E.; Recchia, F.; Smalley, D.; Stroberg, S. R.; Wadsworth, R.; Walz, C.; Weisshaar, D.; Westerberg, A.; Whitmore, K.; Wimmer, K.

doi:10.1103/PhysRevLett.112.142502

Evolution of Collectivity in ${}^{72}{Kr}$ : Evidence for Rapid Shape Transition

Journal Article · Thu Apr 10 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.112.142502· OSTI ID:1454849

Iwasaki, H. ^[1]; Lemasson, A. ^[2]; Morse, C. ^[2]; Dewald, A. ^[3]; Braunroth, T. ^[3]; Bader, V. M. ^[2]; Baugher, T. ^[2]; Bazin, D. ^[2]; Berryman, J. S. ^[2]; Campbell, C. M. ^[4]; Gade, A. ^[2]; Langer, C. ^[2]; Lee, I. Y. ^[4]; Loelius, C. ^[2]; Lunderberg, E. ^[2]; Recchia, F. ^[2]; Smalley, D. ^[2]; Stroberg, S. R. ^[2]; Wadsworth, R. ^[5]; Walz, C. ^[6] more »

Michigan State Univ., East Lansing, MI (United States); UC Berkeley
Michigan State Univ., East Lansing, MI (United States)
Univ. zu Koln (Germany)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of York (United Kingdom)
Michigan State Univ., East Lansing, MI (United States); Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
Central Michigan Univ., Mount Pleasant, MI (United States)
Michigan State Univ., East Lansing, MI (United States); Central Michigan Univ., Mount Pleasant, MI (United States)

The transition rates from the yrast 2⁺ and 4⁺ states in the self-conjugate ⁷²Kr nucleus were studied via lifetime measurements employing the GRETINA array with a novel application of the recoil-distance method. The large collectivity observed for the 4⁺ → 2⁺ transition suggests a prolate character of the excited states. The reduced collectivity previously reported for the 2⁺ → 0⁺ transition was confirmed. The irregular behavior of collectivity points to the occurrence of a rapid oblate-prolate shape transition in ⁷²Kr, providing stringent tests for advanced theories to describe the shape coexistence and its evolution.

View Accepted Manuscript (DOE)

Research Organization:: Nuclear Science and Security Consortium, Berkeley, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0000979

OSTI ID:: 1454849

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 112; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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