Abstract
We have measured both yields of neutron-proton and neutron-neutron pairs emitted from the non-mesonic weak decay process of Λ 5He and Λ12C hypernuclei produced via the (π+, K+) reaction for the first time. We observed clean back-to-back correlation of the np- and nn-pairs in the coincidence spectra for both hypernuclei. The ratio of those back-to-back pair yields, Nnn/Nnp, must be close to the ratio of neutron- and proton-induced decay widths of the decay, Γn (Λn → nn)/Γp(Λp → np). The obtained ratios for each hypernuclei support recent calculations based on short-range interactions.
Original language | English |
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Pages (from-to) | 196-199 |
Number of pages | 4 |
Journal | Nuclear Physics A |
Volume | 752 |
Issue number | 1-4 SPEC. ISS. |
DOIs | |
State | Published - 18 Apr 2005 |