The two-proton pickup reaction (, ) on the even Mo isotopes was investigated at MeV. It was found that the ratio of the ground and first excite state cross sections changes dramatically as neutrons are added to the shell. While the reaction (, ) populates the ground state three times more strongly than the first excited state, for the heaviest isotope , the excited state has twice the population of the ground state. Attempts to explain the cross section ratios by means of distorted-wave Born approximation calculations, based on a complete Brody-Moshinsky decomposition of the two-proton cluster and spherical shell model wave functions, were not successful.
NUCLEAR REACTIONS (, ), MeV; measured ; elastic and inelastic scattering; (, ) reactions; optical model, DWBA calculations.
- Received 15 March 1982
- Published in the issue dated August 1982
© 1982 The American Physical Society