The volume integral of the effective interaction potential between the hyperon and the nucleon has been calculated from the observed binding energies of hyperfragments of mass number 3, 4, 5, 7, and 9. An assumption of short-range, central, spin-independent forces leads to a single value of Mev , independent of experimental uncertainties in the size and shape of nuclei and in the observed binding energies, except for the case of . The additional freedom gained by assuming central spin-dependent forces does not permit the fitting of and the other hypernuclei. It is concluded that the explanation of the anomalously low value of for is to be found in the nuclear properties of its alpha-particle core.
- Received 20 March 1957
- Published in the issue dated July 1957
© 1957 The American Physical Society