OPPORTUNITIES USING GAMMA-RAY ARRAYS WITH RADIOACTIVE BEAMS       (W.N. Catford)

Abstract:

The design of a gamma-ray array suitable for use with radioactive beams must take into account criteria additional to those which have previously defined large arrays, which were developed for fusion-evaporation high spin experiments with stable beams. The radioactive decay of beam particles imposes a new set of constraints, and the relatively low intensity demands an exceptionally high efficiency. Beyond this the kinematics of, for example, nucleon transfer reactions performed in inverse kinematics can require coincident gamma-ray detection in order to achieve good energy resolution and hence Doppler broadening imposes extra constraints. A wide variety of physics is made available with radioactive beams, including fusion-evaporation studies along the N=Z line, Coulomb excitation on both sides of stability, transfer reactions on light nuclei on both sides of stability, deep inelastic studies of heavier neutron rich nuclei and scattering experiments with isomeric beams.

25.60.-t, 29.30.Kv