No abstract

No abstract

The a7Cl(d, 3He)36S and 39K(d, 3He)3SAr reactions have been studied at a bombarding energy of 28.9 MeV. The results are compared with theoretical calculations for two or four holes in the sd-shell. The three-hole spectrum of 37C] is also briefly discussed. In the calculation for 3SAr, additional states of a two-particle four-hole nature are included. In 3SAr, the ground state and levels at 2.166 and 7.14 MeV are excited principally by l = 2 transfer, while transitions with appreciable l = 0 strength are observed to levels at 3. 935, 4.569, 5.158 and 5.563 MeV. This fragmentation is quite well reproduced by the inclusion of the 2p-4h states. In particular the level at 3,935 MeV is largely of this type, a conclusion supported by both the spectroscopic factors and ~ transition rates. The 36S ground state and levels at 6.511 and 7.12 MeV in 36S have angular distributions characteristic of l = 2. Three transitions with l = 0 strength are observed to levels at 3. 295, 4.523 and 4.577 MeV in this nucleus. An additional level was identified at 7.71 MeV but the/-transfer could not be determined. The data are only qualitatively reproduced by the four-hole calculation, which while useful in making probable jr assignments, suggests that core excitation is important here also.

No abstract

The 2°SPb(at, 3He)Z°9pb reaction at 58 MeV has been used to search for high-spin states in a°gPb. Only three levels are excited with appreciable intensity: the ground state (2g~) and levels at 0.781 (1i¥) and 1.426 MeV (lj~). The angular distributions for these levels have been measured and analyzed using standard DWBA calculations to obtain spectroscopic strengths. The 2°SPb(et, ~) elastic scattering was measured and optical parameters deduced from the data. A normalization value N = 50 yields spectroscopic values which are close to the values measured in the (d, p) reaction. The (% 3He) reaction should easily pick out any appreciable components of the j¥ shell model state, which weak-coupling calculations predict should be fragmented. However only three weak transitions previously seen in a (d, p) experiment are observed.