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Phys. Rev. Lett. 104, 212504 (2010) [4 pages]

34P(7Li,7Be+γ) Reaction at 100A  MeV in Inverse Kinematics

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R. G. T. Zegers1,2,3,*, R. Meharchand1,2,3, Y. Shimbara1, Sam M. Austin1,3, D. Bazin1, B. A. Brown1,2,3, C. Aa. Diget1, A. Gade1,2, C. J. Guess1,2,3, M. Hausmann1, G. W. Hitt1,2,3, M. E. Howard4,3, M. King1,2, D. Miller1,2, S. Noji5, A. Signoracci1,2, K. Starosta1,2, C. Tur1,3, C. Vaman1, P. Voss1,2, D. Weisshaar1, and J. Yurkon1
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA
2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
3Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
4Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
5Department of Physics, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan

Received 17 March 2010; published 28 May 2010

We report on the first successful extraction of a β+ Gamow-Teller strength distribution from a radioactive isotope in an intermediate-energy charge-exchange experiment in inverse kinematics. The (7Li,7Be+γ(429  keV)) reaction at 100A  MeV was used to measure Gamow-Teller transition strengths from 34P to states in 34Si. The results show that little mixing occurs between sd and pf shell configurations for the low-lying 0+ and 2+ states even though 34Si neighbors the island of inversion and low-lying 2ℏω intruder states exist. Shell-model calculations in the sdpf model space are consistent with these findings.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.212504
DOI:
10.1103/PhysRevLett.104.212504
PACS:
21.60.Cs, 25.55.Kr, 25.70.Kk, 27.30.+t

*zegers@nscl.msu.edu

 
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