Prompt and delayed spectroscopy of At-199
2010 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 82, no 4, 044302- p.Article in journal (Refereed) Published
The neutron-deficient nucleus At-199 has been studied through gamma-ray and electron spectroscopy, using the recoil-decay tagging technique. Two experiments were conducted, using a gas-filled recoil separator with a focal-plane spectrometer alone and together with a germanium-detector array at the target position. The resulting level scheme for 199At includes a new isomer with a half-life of 0.80(5) mu s and a spin and parity of (29/2(+)). The 13/2(+) isomer, which de-excites via an M2 transition to the 9/2 ground state, was measured to have a half-life of 70(20) ns. Our earlier version of the level scheme for At-197 has been updated as well.
Place, publisher, year, edition, pages
2010. Vol. 82, no 4, 044302- p.
HIGH-SPIN STATES, GAMMA-RAY SPECTROSCOPY, RECOIL FILTER DETECTOR, COINCIDENCE DATA SETS, NUCLEAR-DATA SHEETS, IN-BEAM, EXCITED-STATES, SYSTEMATIC BEHAVIOR, 1ST OBSERVATION, MASS NUCLEI
IdentifiersURN: urn:nbn:se:kth:diva-26627DOI: 10.1103/PhysRevC.82.044302ISI: 000282569800001ScopusID: 2-s2.0-78649361922OAI: oai:DiVA.org:kth-26627DiVA: diva2:374999
QC 201012072010-12-072010-11-262010-12-07Bibliographically approved