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Phys. Rev. C 74, 034322 (2006) [5 pages]

Evolution of the E(1/21+)-E(3/21+) energy spacing in odd-mass K, Cl, and P isotopes for N=20-28

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A. Gade1,2, B. A. Brown1,2, D. Bazin1, C. M. Campbell1,2, J. A. Church1,2, D. C. Dinca1,2, J. Enders3, T. Glasmacher1,2, M. Horoi4, Z. Hu1, K. W. Kemper5, W. F. Mueller1, T. Otsuka6,7, L. A. Riley8, B. T. Roeder5, T. Suzuki9, J. R. Terry1,2, K. L. Yurkewicz1,2, and H. Zwahlen1,2
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
3Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
4Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
5Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
6Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033, Japan
7RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan
8Department of Physics and Astronomy, Ursinus College, Collegeville, Pennsylvania 19426, USA
9Department of Physics, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan

Received 23 January 2006; published 15 September 2006

The energy of the first excited state in the neutron-rich N=28 nucleus 45Cl has been established via in-beam γ-ray spectroscopy following proton removal. This energy value completes the systematics of the E(1/21+)-E(3/21+) level spacing in odd-mass K, Cl, and P isotopes for N=20-28. The results are discussed in the framework of shell-model calculations in the sd-fp model space. The contribution of the central, spin-orbit, and tensor components is discussed from a calculation based on a proton single-hole spectrum from G-matrix and π+ρ meson exchange potentials. A composite model for the proton 0d3/2-1s1/2 single-particle energy shift is presented.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.74.034322
DOI:
10.1103/PhysRevC.74.034322
PACS:
23.20.Lv, 21.60.Cs, 25.70.Mn, 27.40.+z
 
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