MICROSCOPIC DESCRIPTION OF ALPHA-DECAY FROM SUPERDEFORMED NUCLEI

A microscopic formalism to treat ct decay from superdeformed nuclei is given within the;framework of the Hartree-Fock-Bogoliubov approximati on. The process of penetration through the deformed barrier is describ ed exactly. The influence of the deformation on the formation amplitud e and on the penetrability is analyzed. It is found that the results o f the WKB approximation differ strongly from the exact ones as the def ormation increases for beta(2) larger than 0.3. The most favorable cas e that we found corresponds to a superdeformed band in Pb-192, for whi ch the a decay probability is very large, making this a likely mechani sm to feed the daughter nucleus Hg-188. [S0556-2813(98)02010-X].