NUCLEAR-REACTION STUDIES IN STRONTIUM ISOTOPES - SR88(D,P)SR89 REACTION

The Sr88(d,p)Sr89 reaction has been studied at 7.0 MeV using the MIT-ONR Van de Graaff generator and the multiple-gap spectrograph. Eighty-five levels in Sr89 below 5.86-MeV excitation were identified, compared with the 12 levels below 4.1-MeV excitation recorded previously from (d,p) studies. Among the 85 levels observed, 28 were populated by direct stripping transitions, and the data were used for determining the detailed fractionization of the single-particle strength in this energy region. A distorted-wave Born-approximation analysis was performed in these cases to determine the values of the orbital angular momentum ln and spectroscopic strengths (2J+1)Sln,j for the transferred neutron. Sum-rule strengths were subsequently calculated and compared with shell-model limits. Detailed angular distributions for some of the nonstripping states are also presented. An averaged strength function for these weaker transitions is shown and is discussed in terms of possible intermediate structure. © 1968 The American Physical Society.