Identification of gamma rays from Au-172 and alpha decays of Au-172, Ir-168, and Re-164
2009 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 80, no 6, 064310- p.Article in journal (Refereed) Published
The very neutron deficient odd-odd nucleus Au-172 was studied in reactions of 342 and 348 MeV Kr-78 beams with an isotopically enriched Ru-96 target. The alpha decays previously reported for Au-172 were confirmed and the decay chain extended down to Tm-152 through the discovery of a new alpha-decaying state in Re-164 [E-alpha=5623(10) keV; t(1/2)=864(-110)(+150) ms; b(alpha)=3(1)%]. Fine structure in these alpha decays of Au-172 and Ir-168 were identified. A new alpha-decaying state was also observed and assigned as the ground state in Au-172 [E-alpha=6762(10) keV; t(1/2)=22(-5)(+6) ms]. This decay chain was also correlated down to Tm-152 through previously reported alpha decays. Prompt gamma rays from excited states in Au-172 have been identified using the recoil-decay tagging technique. The partial level scheme constructed for Au-172 indicates that it has an irregular structure. Possible configurations of the alpha-decaying states in Au-172 are discussed in terms of the systematics of nuclei in this region and total Routhian surface calculations.
Place, publisher, year, edition, pages
2009. Vol. 80, no 6, 064310- p.
neutron-deficient isotopes, total data readout, proton drip-line, shape, coexistence, nuclei, radioactivity, spectroscopy, elements, states
IdentifiersURN: urn:nbn:se:kth:diva-19096DOI: 10.1103/PhysRevC.80.064310ISI: 000273232700020ScopusID: 2-s2.0-73849132435OAI: oai:DiVA.org:kth-19096DiVA: diva2:337143
QC 201005252010-08-052010-08-052012-03-26Bibliographically approved