Published December 2003 | Version v1
Journal article

Neutron energy spectra from the nonmesonic weak decay of Λ12C and Λ89Y hypernuclei

  • 1. Department of Physics, Hampton University, Hampton, Virginia 23668 (United States)
  • 2. Department of Physics, North Carolina A and T State University, Greensboro, North Carolina 27411 (United States)
  • 3. Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan)
  • 4. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)
  • 5. Department of Physics, Tohoku University, Sendai, 980-8578 (Japan)
  • 6. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
  • 7. Department of Physics, Seoul National University, Seoul 151-742 (Korea, Republic of)

Description

We have measured the neutron spectra emitted in the weak decay of Λ12C and Λ89Y over the energy region above 10 MeV in the (π+,K+) reaction with better statistics and an improved signal-to-background ratio. The neutron yields in the nonmesonic weak decays were obtained from the spectra. By using the proton yield of Λ12C, the Γn/Γp ratio was estimated to be 0.51±0.15 (stat) from the neutron-to-proton yield ratio for the first time, which suggests the Γn/Γp ratio is significantly less than unity

Additional details

Identifiers

Publishing Information

Journal Title
Physical Review. C, Nuclear Physics
Journal Volume
68
Journal Issue
6
Journal Page Range
p. 065201-065201.5
ISSN
0556-2813
CODEN
PRVCAN

Optional Information

Notes
(c) 2003 The American Physical Society