Beta decay of N18 to alpha particle emitting states in O18 and a proposed search for parity violation in O18

Z. Zhao, M. Gai, B. J. Lund, S. L. Rugari, D. Mikolas, B. A. Brown, J. A. Nolen, Jr., and M. Samuel
Phys. Rev. C 39, 1985 – Published 1 May 1989
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Abstract

The beta-delayed alpha-particle emission from N18 has been studied and the absolute beta decay branching ratios of N18 to the 13 and 14 states in O18 measured. The N18 nuclei were produced using a 35-MeV/nucleon Ne22 beam and a thick Ta target. Reaction products were separated (from the beam) using a reaction products mass separator. A silicon telescope including five detectors and a two-dimensional, position-sensitive, gas counter was used in the focal plane of the mass separator. We obtain beta decay branching ratios of 6.8±0.5% and 1.8±0.2 % to the 13 and 14 states, respectively, assuming 100% alpha-particle decay branching ratios for these states. Shell-model predictions are compared with these experimental results. The relevance of these data to a new proposed search for parity violation in O18 is discussed.

  • Received 7 November 1988

DOI:https://doi.org/10.1103/PhysRevC.39.1985

©1989 American Physical Society

Authors & Affiliations

Z. Zhao, M. Gai, B. J. Lund, and S. L. Rugari

  • A.W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511

D. Mikolas, B. A. Brown, J. A. Nolen, Jr., and M. Samuel

  • National Superconducting Cyclotron Laboratory and Department of Physics, Michigan State University, East Lansing, Michigan 48824

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Vol. 39, Iss. 5 — May 1989

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