BETA-DELAYED PROTON SPECTROSCOPY OF SI-24

Recently an experiment has been carried out at RIKEN, Japan, using the projectile fragment separator RIPS to test a new approach of studying beta-delayed proton emitters. The approach consists of reduction of c ontamination from neighbouring isotones and isotopes by using a set of Al absorbers at the RIPS focal plane and stopping the fragments of in terest on a thin foil placed in front of a gas Delta E-Si E detector t elescope for delayed proton measurement. These two together have led t o a remarkable reduction of beta-background in the delayed proton spec trum of Si-24,and a number of new levels in Al-24 decaying by proton e mission to Mg-23 have been observed. The details of the technique and the results obtained from the beta-delayed proton decay of Si-24 Will be discussed.