gamma-ray spectroscopy of At-197
2008 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 78, no 4, 044328-1-044328-8 p.Article in journal (Refereed) Published
Excited states of the extremely neutron-deficient nucleus At-197 have been studied in an in-beam experiment using the fusion-evaporation reaction Sn-118(Kr-82,p2n)At-197. gamma rays belonging to At-197 feeding the I-pi=(9/2(-)) ground state, as well as gamma rays feeding the 311-keV I-pi=(13/2(+)) isomer, decaying via the emission of gamma rays, and the 52-keV I-pi=(1/2(+)) alpha-decaying isomer have been identified using the recoil-alpha-decay tagging technique. Total Routhian surface calculations predict a near-spherical shape for the (9/2(-)) ground state and oblate shapes with beta(2) around -0.2 for the (1/2(+)) and the (13/2(+)) states. These predictions agree with our experimental findings.
Place, publisher, year, edition, pages
2008. Vol. 78, no 4, 044328-1-044328-8 p.
HIGH-SPIN STATES, ALPHA-DECAY, BI-187, BI-189 ISOTOPES, EXCITED-STATES, MEAN-FIELD, NUCLEI, IDENTIFICATION, DEFORMATION, BEHAVIOR
IdentifiersURN: urn:nbn:se:kth:diva-8209DOI: 10.1103/PhysRevC.78.044328ISI: 000260574700043ScopusID: 2-s2.0-55849132529OAI: oai:DiVA.org:kth-8209DiVA: diva2:13468
QC 201006212008-04-092008-04-092010-08-20Bibliographically approved