Precise atomic masses of neutron-rich Br and Rb nuclei close to the r-process path

S. Rahaman; U. Hager; V. -V. Elomaa; T. Eronen; J. Hakala; A. Jokinen; A. Kankainen; P. Karvonen; I. D. Moore; H. Penttilä; S. Rinta-Antila; J. Rissanen; A. Saastamoinen; T. Sonoda; J. Äystö

doi:10.1140/epja/i2006-10297-y

EPJ

Precise atomic masses of neutron-rich Br and Rb nuclei close to the r-process path

S. Rahaman^*, U. Hager, V. -V. Elomaa, T. Eronen, J. Hakala, A. Jokinen, A. Kankainen, P. Karvonen, I. D. Moore, H. Penttilä, S. Rinta-Antila, J. Rissanen, A. Saastamoinen, T. Sonoda and J. Äystö

Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), FIN-40014, Finland

Received: 18 October 2006
Accepted: 2 March 2007
Published online: 3 April 2007

Abstract

The Penning trap mass spectrometer JYFLTRAP, coupled to the Ion-Guide Isotope Separator On-Line (IGISOL) facility at Jyväskylä, was employed to measure the atomic masses of neutron-rich ^85-92Br and ^94-97Rb isotopes with a typical accuracy less than 10keV. Discrepancies with the older data are discussed. Comparison to different mass models is presented. Details of nuclear structure, shell and subshell closures are investigated by studying the two-neutron separation energy and the shell gap energy.

PACS: 21.10.Dr Binding energies and masses – / 27.50.+e 59≤A≤89 – / 27.60.+j 90≤A≤149 – / 07.75.+h Mass spectrometers –

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EPJ

Precise atomic masses of neutron-rich Br and Rb nuclei close to the r-process path

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