The (p,d) Reaction at E_p=121 MeV

This work was supported by National Science Foundation Grant PHY 75-00289 and Indiana Universit

The (p,t) Reaction at Higher Energy

This work was supported by National Science Foundation Grant PHY 76-84033 and Indiana Universit

Proton Stripping to Stretched States in 26-Al, 52-Cr, and 60-Si

This research was sponsored by the National Science Foundation Grant NSF PHy 87-1440

Spectroscopy of A=12 at High Excitation

Supported by the National Science Foundation and Indiana Universit

Energy Dependence of the NN t-matrix in the Optical Potential for Elastic Nucleon-Nucleus Scattering

The influence of the energy dependence of the free NN t-matrix on the optical potential of nucleon-nucleus elastic scattering is investigated within the context of a full-folding model based on the impulse approximation. The treatment of the pole structure of the NN t-matrix, which has to be taken into account when integrating to negative energies is described in detail. We calculate proton-nucleus elastic scattering observables for $^{16}$O, $^{40}$Ca, and $^{208}$Pb between 65 and 200 MeV laboratory energy and study the effect of the energy dependence of the NN t-matrix. We compare this result with experiment and with calculations where the center-of-mass energy of the NN t-matrix is fixed at half the projectile energy. It is found that around 200 MeV the fixed energy approximation is a very good representation of the full calculation, however deviations occur when going to lower energies (65 MeV).Comment: 11 pages (revtex), 6 postscript figure

Level Structure of Cr(52)

The low excited states of Cr(52) have been investigated by studying the decay of Mn(52) using scintillation spectrometers and a double-focusing beta-ray spectrometer. In addition to the three strong lines at 0.74, 0.94, and 1.43 Mev, a number of weak transitions have been observed that require the addition of at least one new level at 3.614 Mev and which yield information on the spins and parities of the various levels. The following gamma rays have been observed: 1.434 Mev (100%), 1.332 Mev (5.7%), 1.246 Mev (5.8%), 1.214 Mev (2.9%), 0.935 Mev (83.9%), 0.847 Mev (2.6%), 0.744 Mev (81.9%), and 0.346 Mev (0.9%); in addition to several weaker and more uncertain lines. A decay scheme has been constructed which consists of levels at 1.434 Mev (2+), 2.369 Mev (4+), 2.648 Mev, 2.766 Mev (4+), 3.112 Mev (6+), 3.161 Mev (1,2,3), 3.614 Mev (5+, 6+), and 3.832 Mev (5+, 6+). A comparison has been made between the experimentally determined level structure and several theoretical calculations. Mn(54) (290 day) was present in the Mn(52). The energy of the Mn(54) gamma-ray transition was determined to be 834.9±1.1 kev.Work supported in part by the U.S. Atomic Energy Commission and the National Science FoundationUnder the auspices of the Advanced Science Program, Office of Naval Research, and U.S. Naval Postgraduate SchoolLieutenant, United States Nav

The 12-C(p,d)11-C Reaction at E=121.2 MeV

This work was supported by National Science Foundation Grant PHY 76-84033 and Indiana Universit

The (p,d) Reaction on 58-Ni, 90-Zr and 208-Pb at 121 MeV

This work was supported by National Science Foundation Grants PHY 76-84033A01, PHY 78-22774, and Indiana Universit