Precision measurements of proton emission from the ground states of Ta-156 and Re-160
2011 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 83, no 6, 064320- p.Article in journal (Refereed) Published
The decays of the pi d(3/2) ground states of Ta-156 and Re-160 have been studied in detail using the GREAT spectrometer. More than 7000 Re-160 nuclei were produced in reactions of 290- and 300-MeV Ni-58 ions with an isotopically enriched Cd-106 target and separated in flight using the RITU separator. The proton and alpha decays of the pi d(3/2) level were confirmed and the half-life and branching ratios of this state were determined with improved precision to be t(1/2) = 611 +/- 7 mu s and b(p) = 89 +/- 1% and b(alpha) = 11 +/- 1%, respectively. The alpha-decay branch populated the ground state of Ta-156, allowing improved values for the proton-decay energy and half-life to be obtained (E-p = 1011 +/- 5 keV; t(1/2) = 106 +/- 4 ms). The beta decay of this level was identified for the first time and a branching ratio of b(beta) = 29 +/- 3% was deduced. The spectroscopic factors deduced from these measurements are compared with predictions.
Place, publisher, year, edition, pages
2011. Vol. 83, no 6, 064320- p.
EMITTERS, NUCLEI, DECAY, MODEL
IdentifiersURN: urn:nbn:se:kth:diva-35604DOI: 10.1103/PhysRevC.83.064320ISI: 000291798600001ScopusID: 2-s2.0-79961115090OAI: oai:DiVA.org:kth-35604DiVA: diva2:429724
QC 201107052011-07-052011-07-042011-07-05Bibliographically approved