{gamma}-ray spectroscopy of {sup 197}At

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.044328· OSTI ID:21192307

Andgren, K; Cederwall, B; Baeck, T; Hadinia, B; Johnson, A; Khaplanov, A; Sandzelius, M; Wyss, R ^[1]; Jakobsson, U; Uusitalo, J; Greenlees, P T; Jones, P M; Juutinen, S; Julin, R; Ketelhut, S; Leino, M; Nyman, M; Rahkila, P; Saren, J; Scholey, C ^[2]

---

1. Department of Physics, Royal Institute of Technology, SE-10691 Stockholm (Sweden)
2. Department of Physics, University of Jyvaeskylae, P. O. Box 35, FI-40014 (Finland)

Excited states of the extremely neutron-deficient nucleus {sup 197}At have been studied in an in-beam experiment using the fusion-evaporation reaction {sup 118}Sn({sup 82}Kr,p2n){sup 197}At. {gamma} rays belonging to {sup 197}At feeding the I{sup {pi}}=(9/2{sup -}) ground state, as well as {gamma} rays feeding the 311-keV I{sup {pi}}=(13/2{sup +}) isomer, decaying via the emission of {gamma} rays, and the 52-keV I{sup {pi}}=(1/2{sup +}){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{sup -}) ground state and oblate shapes with {beta}{sub 2} around -0.2 for the (1/2{sup +}) and the (13/2{sup +}) states. These predictions agree with our experimental findings.

• OSTI ID: 21192307
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 4; Other Information: DOI: 10.1103/PhysRevC.78.044328; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ASTATINE 197
BEAMS
EVAPORATION
EXCITED STATES
FORECASTING
GAMMA RADIATION
GAMMA SPECTROSCOPY
GROUND STATES
ISOMERS
KEV RANGE
KRYPTON 82
NEUTRON EMISSION
NEUTRON-DEFICIENT ISOTOPES
PROTON-EMISSION DECAY
RECOILS
SPHERICAL CONFIGURATION
SURFACES
THERMONUCLEAR REACTIONS
TIN 118 TARGET