High-precision Penning trap mass measurements of neutron-rich sulfur isotopes at the $N=28$ shell closure

High-precision Penning trap mass measurements of neutron-rich sulfur isotopes at the $N = 28$ shell closure

R. Ringle, C. Bachelet, M. Block, G. Bollen, M. Facina, C. M. Folden, III, C. Guénaut, A. A. Kwiatkowski, D. J. Morrissey, G. K. Pang, A. M. Prinke, J. Savory, P. Schury, S. Schwarz, and C. S. Sumithrarachchi

Phys. Rev. C 80, 064321 – Published 28 December 2009

Abstract

Direct mass measurements of the neutron-rich ${}^{40 - 44}S$ isotopes were performed at the Low Energy Beam and Ion Trap facility at the National Superconducting Cyclotron Laboratory. The resulting mass excesses (MEs) are $ME ({}^{40}S) = - 22 837.8 (3.9)$ keV, $ME ({}^{41}S) = - 19 008.6 (4.1)$ keV, $ME ({}^{42}S) = - 17 637.9 (2.7)$ keV, $ME ({}^{43}S) = - 12 195.5 (4.9)$ keV, and $ME ({}^{44}S) = - 9 204.2 (5.2)$ keV, and they represent improvements by factors of 20 to 50 in the precision of previous mass measurements of these isotopes.

Received 24 October 2009

DOI:https://doi.org/10.1103/PhysRevC.80.064321

Authors & Affiliations

R. Ringle^1,*, C. Bachelet^1,†, M. Block^1,‡, G. Bollen^1,2, M. Facina^1,§, C. M. Folden, III^1,∥, C. Guénaut^1,¶, A. A. Kwiatkowski^1,2, D. J. Morrissey^1,3, G. K. Pang^1,3, A. M. Prinke^1,2, J. Savory^1,2, P. Schury^1,2,**, S. Schwarz¹, and C. S. Sumithrarachchi^1,3,††

¹National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
²Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
³Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA

^*ringle@nscl.msu.edu
^†Present address: CSNSM-IN2P3/CNRS, Bat. 108, Université de Paris Sud, F-91405 Orsay, France.
^‡Present address: GSI, Planckstrasse 1, D-64291 Darmstadt, Germany.
^§Present address: Bubble Technology Industries, Chalk River, Ontario, Canada K0J 1J0.
^∥Present address: Cyclotron Institute, Texas A&M University, College Station, Texas 77843-3366, USA.
^¶Present address: Comissariat á l’Energie Atomique, CEA-Saclay, F-91191 Gif sur Yvette Cedex, France.
^**Present address: Tsukuba University, Tennoudai 1-1-1, Ibaraki, Japan.
^††Present address: Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1.

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Vol. 80, Iss. 6 — December 2009

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Physical Review C

covering nuclear physics