INVESTIGATION OF THE NUCLEAR STRUCTURE OF SILVER-111 AND A COMPARISON WITH SILVER-105
Abstract
An unusually large number of new states have been observed in ('111)Ag via the (('3)He, pn(gamma)) reaction. Because of the excess rest mass and relatively low charge of ('3)He nuclei, the reaction can be used to populate non-yrast states. A proton-gamma-ray coincidence requirement was used to separate the (('3)He, pn) reaction from many competing reactions. Gamma-ray excitation functions, angular distributions, and (gamma)-(gamma) coincidences were measured and used to construct a level scheme for ('111)Ag. The excitation functions proved to be a powerful new tool for making angular momentum assignments. Thirty eight of the observed eighty-two states have been observed the first time in this investigation. A rotational model calculation treating the Coriolis and recoil terms to all orders and including a variable moment of inertia was successful in predicting the energies and transition properties of many states. With few parameters, this model was able to interprete successfully the nuclear structure of both ('105)Ag and ('111)Ag. The success of this model is remarkable particularly in the case of ('111)Ag which has a complex decay scheme.
Degree
Ph.D.
Subject Area
Nuclear physics
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