First decay study of the very neutron-rich isotope <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>93</mn></mrow></msup></mrow><mi mathvariant="normal">Br</mi></math></span>

G. Lhersonneau; A. Wöhr; B. Pfeiffer; K.-L. Kratz; the ISOLDE Collaboration

doi:10.1103/PhysRevC.63.034316

First decay study of the very neutron-rich isotope $^{93} Br$

G. Lhersonneau, A. Wöhr, B. Pfeiffer, K.-L. Kratz, and the ISOLDE Collaboration

Phys. Rev. C 63, 034316 – Published 20 February 2001

Abstract

The decay of the mass-separated, very neutron-rich isotope $^{93} Br$ has been studied by γ spectroscopy. A level scheme of its daughter $^{93} Kr$ has been constructed. Level energies, γ-ray branching ratios, and multipolarities suggest spins and parities which are in accord with a smooth systematics of the $N = 57$ isotones for $Z <~ 40,$ suggesting the $N = 56$ subshell closure still to be effective in Kr isotopes. So far, there is no indication of a progressive onset of deformation in neutron-rich Kr isotopes.

Received 3 November 2000

DOI:https://doi.org/10.1103/PhysRevC.63.034316

Authors & Affiliations

G. Lhersonneau^1,2, A. Wöhr^1,3, B. Pfeiffer¹, K.-L. Kratz¹, and the ISOLDE Collaboration⁴

¹Institut für Kernchemie, Universität Mainz, D-55099 Mainz, Germany
²Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä, Finland
³Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
⁴CERN, CH-1211 Geneva 23, Switzerland

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Vol. 63, Iss. 3 — March 2001

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Physical Review C

covering nuclear physics