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Phys. Rev. C 58, 739 - 748 (1998)

γ-ray spectroscopy of 42K and 43K

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M. Moralles *, P. Jänker, H. Leitz, K. E. G. Löbner, K. Rudolph, F. J. Schindler, H.-G. Thies, and T. Winkelmann
Sektion Physik, Universität München, Am Coulombwall 1, D-85748 Garching, Germany

P. R. Pascholati
Instituto de Física da Universidade de São Paulo, CP 66318, CEP 05315-970 São Paulo, SP, Brazil

B. A. Brown
National Superconducting Cyclotron Laboratory and Department of Physics, Michigan State University, East Lansing, Michigan 48824

Received 9 April 1998

Excited states of 42K and 43K were investigated using the reactions 9Be(36S,2np)42K and 9Be(36S,np)43K. Three methods of selective γ-ray spectroscopy were employed: recoil-nuclei-γ, proton-γ, and γ-γ coincidence measurements. Thirty-eight electromagnetic transitions were observed originally, 22 belonging to 42K and 16 belonging to 43K. Eight new levels are suggested for 42K and four for 43K. Shell-model calculations were performed in the (sd)-1(fp)3 space to obtain negative-parity states of 42K and (sd)-1(fp)4 space for positive-parity states of 43K. The calculated energies are in good agreement with the experimental values, but some systematic differences indicate that the collectivity of the actual levels is not completely accounted for by the configuration space used in the calculations.


©1998 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.58.739
DOI: 10.1103/PhysRevC.58.739
PACS: 23.20.Lv, 25.70.Gh, 27.40.+z, 29.30.Aj

* Author to whom correspondence should be addressed; Permanent address: Instituto de Pesquisas Energéticas e Nucleares, CP 11049, CEP 05422-970 São Paulo, SP, Brazil; Electronic address: moralles@curiango.ipen.br

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