BRANCHING RATIOS FOR THE DECAY OF p-SHELL $lambda$-HYPERNUCLEI
The possibility of determining the spin dependence of the LAMBDA - nucleon force from a study of hyperuclei in which the LAMBDA particle is bound to a nucleus with an incompletely filled (1p) nuclear shell was investigated. It was pointed out that present uncertainties in the data on binding energies of hypernuclei permit only the determination of the combination E/sub s/ + 3E/sub t/ , where E/sub s/ and E/sub t/ are the singlet and triplet interaction energies, respectively. It was shown that the decay of hypernuclei by pi emission can give information regarding the spin dependence of the force if the branching ratio for decay to the ground state and first excited state of the daughter nucleus is measured. In particular, if the spin of /sub LAMBDA /B/sup 12/ is 2, decay to th e first excited state of C/sup 12/ is favored by a factor 1.2 over decay to the ground level. However, if J = 1 for this hypernucleus, decay to the ground state is preferred by a factor of 2.4. The change that the interaction of the pi /sup -/meson with the C/sup 12/ nucleus produces in the branching ratio was estimated by use of a complex square well potential. Inclusion of the interaction signilficantly increased the branching ratio for a hypernclear spin of 2, but did not change the ratio for J = 1. On the other hand, for /sub / sub L/LI/sup 7/ the branching ratio for decay to the ground ard first excited state of Be/sup 7/ was irdependent of the spin of hypernucleus. (auth)
- Research Organization:
- Argonne National Lab., Ill.
- NSA Number:
- NSA-15-000856
- OSTI ID:
- 4122689
- Journal Information:
- Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B, Journal Name: Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B Vol. Vol: (10), 17; ISSN NUCIA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Measurement of decay branching ratios for the /sub $lambda$/$sup 4$He hypernucleus
The weak decay of hypernuclei