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Proton radioactivity of 117La

Phys. Rev. C 64, 031303(R) – Published 14 August 2001
H. Mahmud, C. N. Davids, P. J. Woods, T. Davinson, A. Heinz, G. L. Poli, J. J. Ressler, K. Schmidt, D. Seweryniak, M. B. Smith, A. A. Sonzogni, J. Uusitalo, and W. B. Walters


A new more precise measurement of the ground-state proton decay of 117La is presented [Ep=806(5)keV, t1/2,p=26(3) ms]. 117La was produced via the p4n fusion-evaporation channel by bombarding a 64Zn target with 310 and 295 MeV 58Ni beams. The proton decay rate is consistent with emission from a prolate deformed 3/2+ or 3/2- Nilsson state. No evidence is found for a previously reported proton decay from a high spin isomer in 117La. An upper limit for the production cross section for proton decay of 116La at a bombarding energy of 325 MeV was established.

DOI: http://dx.doi.org/10.1103/PhysRevC.64.031303

  • Received 28 March 2001
  • Published 14 August 2001

© 2001 The American Physical Society

Authors & Affiliations

H. Mahmud1, C. N. Davids2, P. J. Woods1, T. Davinson1, A. Heinz2, G. L. Poli2, J. J. Ressler3, K. Schmidt1, D. Seweryniak2,3, M. B. Smith4, A. A. Sonzogni5, J. Uusitalo6, and W. B. Walters3

  • 1Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
  • 2Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
  • 3Department of Chemistry, University of Maryland, College Park, Maryland 20742
  • 4Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903
  • 5National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973
  • 6Department of Physics, University of Jyväskylä, Jyväskylä, Finland

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