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Neutron energy spectra from the nonmesonic weak decay of Λ 12C and Λ89Y hypernuclei
- Authors
- Kim, J.H.; Bhang, H.; Kim, M.J.; Kim, Y.D.; Park, H.; Ajimura, S.; Kishimoto, T.; Minami, S.; Mori, T.; Sakaguchi, A.; Shimizu, Y.; Sumihama, M.; Endo, T.; Hashimoto, O.; Miyoshi, T.; Nishida, J.; Saito, T.; Sato, Y.; Satoh, S.; Takahashi, T.; Tamura, H.; Fukuda, T.; Nagae, T.; Noumi, H.; Outa, H.; Sekimoto, M.; Hotchi, H.; Tanida, K.; Sawafta, R.; Tang, L.I.
- Issue Date
- Dec-2003
- Publisher
- American Physical Society
- Citation
- Physical Review C - Nuclear Physics, v.68, no.6, pp 652011 - 652015
- Pages
- 5
- Journal Title
- Physical Review C - Nuclear Physics
- Volume
- 68
- Number
- 6
- Start Page
- 652011
- End Page
- 652015
- ISSN
- 0556-2813
1089-490X
- Abstract
- 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 Γ n/Γp ratio is significantly less than unity.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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