A. D. Bacher

High-spin states inCo56,58with theNi58,60(d,α)Co56,58reaction

Angular distributions of the /sup 58,60/Ni(d,..cap alpha..)/sup 56,58/Co reaction at 80 MeV bombarding energy have been measured for strongly populated states in /sup 56,58/Co up to an excitation energy of 5.3 MeV. Besides the transitions to the known 7/sup +/ state at 2.283 MeV and 6/sup +/ state at 2.372 MeV in /sup 56/Co, states at 3.54(2) and 4.44(3) MeV in /sup 56/Co and at 2.69(2), 2.94(2), 3.78(2), and 4.79(3) MeV in /sup 58/Co are strongly excited by characteristic L = 6 angular distributions. This limits the J/sup ..pi../ values for these states to (5/sup +/), 6/sup +/, or 7/sup +/. The experimental angular distributions are compared with distorted-wave Born approximation calculations based on two sets of recent shell model wave functions, calculated in the same configuration space but with different effective residual interactions.

Spin determination of deep hole states from (p↘,d) reactions

Analyzing power measurements in (p↘,d) reactions on 90Zr, 120Sn and 208Pb have been performed using a 90 MeV polarized proton beam. The spin of the broad structure near 5 MeV excitation energy in 119Sn has been unambiguously determined to be 9/2 by comparing the analyzing power with that observed for the ground state of 89Zr as well as with a DWBA calculation.

Study of isospin structure of 1+ spin states in 58Ni and 58Cu by the comparison of 58Ni(p,p′) and 58Ni(3He,t)58Cu reactions

High-resolution measurements of proton inelastic and charge-exchange (3He,t) reactions at 0° on 58Ni were performed. These reactions mainly cause isovector spin flip transitions of M1 states in 58Ni and GT states in 58Cu. The “level-by-level” comparison of analogous M1 and GT transition strengths allows the study of the isospin symmetry structure of highly-excited analog states in 58Ni and 58Cu and identification of isospin T (T=1 and 2) based on the different sensitivities of inelastic and charge exchange reactions.

High-spin states in /sup 56,58/Co with the /sup 58,60/Ni(d,. cap alpha. )/sup 56,58/Co reaction

Angular distributions of the /sup 58,60/Ni(d,..cap alpha..)/sup 56,58/Co reaction at 80 MeV bombarding energy have been measured for strongly populated states in /sup 56,58/Co up to an excitation energy of 5.3 MeV. Besides the transitions to the known 7/sup +/ state at 2.283 MeV and 6/sup +/ state at 2.372 MeV in /sup 56/Co, states at 3.54(2) and 4.44(3) MeV in /sup 56/Co and at 2.69(2), 2.94(2), 3.78(2), and 4.79(3) MeV in /sup 58/Co are strongly excited by characteristic L = 6 angular distributions. This limits the J/sup ..pi../ values for these states to (5/sup +/), 6/sup +/, or 7/sup +/. The experimental angular distributions are compared with distorted-wave Born approximation calculations based on two sets of recent shell model wave functions, calculated in the same configuration space but with different effective residual interactions.

High-spin states in Co-56, Co-58 with the Ni-58, Ni-60 (d, alpha) Co-56, Co-58 reaction

Angular distributions of the /sup 58,60/Ni(d,..cap alpha..)/sup 56,58/Co reaction at 80 MeV bombarding energy have been measured for strongly populated states in /sup 56,58/Co up to an excitation energy of 5.3 MeV. Besides the transitions to the known 7/sup +/ state at 2.283 MeV and 6/sup +/ state at 2.372 MeV in /sup 56/Co, states at 3.54(2) and 4.44(3) MeV in /sup 56/Co and at 2.69(2), 2.94(2), 3.78(2), and 4.79(3) MeV in /sup 58/Co are strongly excited by characteristic L = 6 angular distributions. This limits the J/sup ..pi../ values for these states to (5/sup +/), 6/sup +/, or 7/sup +/. The experimental angular distributions are compared with distorted-wave Born approximation calculations based on two sets of recent shell model wave functions, calculated in the same configuration space but with different effective residual interactions.