Hynes Mv

Momentum‐space optical potential SND elastic scattering calculations

Initial results are presented for proton‐nucleus elastic scattering observables calculated with a newly developed microscopic momentum‐space code. This is the first phase of a program to treat elastic and inelastic scatterig consistently via an integral equation approach. A number of microscopic features which are often approximated or ignored are quite amenable to exact treatment within this approach, e.g. non‐local effectss in elastic scattering, and inelastic effects which are non‐linear in the NN t‐matrix and target densities but nevertheless confined to one participating nucleon.

Electron scattering from sup 9 Be

The structure of {sup 9}Be is investigated using electron scattering measurements at 90{degree} and 160{degree} for momentum transfers between about 1.0 and 2.5 fm{sup {minus}1}. In addition to the 3/2{sup {minus}} ground state and the narrow 5/2{sup {minus}} state at 2.43 MeV, detailed line-shape analysis was used to extract cross sections for broad states at 1.68, 3.05, 4.70, 6.38, 6.76, 11.28, and 13.79 MeV. The previously unknown state at 6.38 MeV was isolated from the known 6.76 MeV state in both ({ital e},{ital e}{prime}) and ({ital p},{ital p}{prime}) data using the dependence of peak position upon momentum transfer. On the basis of the form factor, the 6.38 MeV state replaces the 6.76 MeV state as the 7/2{sup {minus}} member of the ground-state rotational band and the 6.76 MeV state is identified with the lowest 9/2{sup +} state predicted by the shell model. The data for all states are compared with a shell-model calculation that uses the full 0{h bar}{omega} and 1{h bar}{omega} model spaces. Calculations are also presented for the narrow states between 14 and 18 MeV excitation.

Electron scattering fromBe9

The structure of {sup 9}Be is investigated using electron scattering measurements at 90{degree} and 160{degree} for momentum transfers between about 1.0 and 2.5 fm{sup {minus}1}. In addition to the 3/2{sup {minus}} ground state and the narrow 5/2{sup {minus}} state at 2.43 MeV, detailed line-shape analysis was used to extract cross sections for broad states at 1.68, 3.05, 4.70, 6.38, 6.76, 11.28, and 13.79 MeV. The previously unknown state at 6.38 MeV was isolated from the known 6.76 MeV state in both ({ital e},{ital e}{prime}) and ({ital p},{ital p}{prime}) data using the dependence of peak position upon momentum transfer. On the basis of the form factor, the 6.38 MeV state replaces the 6.76 MeV state as the 7/2{sup {minus}} member of the ground-state rotational band and the 6.76 MeV state is identified with the lowest 9/2{sup +} state predicted by the shell model. The data for all states are compared with a shell-model calculation that uses the full 0{h bar}{omega} and 1{h bar}{omega} model spaces. Calculations are also presented for the narrow states between 14 and 18 MeV excitation.