{alpha} decay of {sup 194}At

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.064320· OSTI ID:21289914

Andreyev, A N ^[1]; Antalic, S; Streicher, B; Saro, S; Venhart, M ^[2]; Ackermann, D; Heinz, S; Hessberger, F P; Kojouharov, I; Kindler, B; Lommel, B; Mann, R; Sulignano, B ^[3]; Bianco, L; Page, R D; Sapple, P; Thomson, J ^[4]; Franchoo, S ^[5]; Hofmann, S ^[3]; Huyse, M ^[1]

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1. Instituut voor Kern- en Stralingsfysica, K.U. Leuven, University of Leuven, B-3001 Leuven (Belgium)
2. Department of Nuclear Physics and Biophysics, Comenius University, Bratislava, SK-84248 (Slovakia)
3. Gesellschaft fuer Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt (Germany)
4. Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
5. IPN Orsay, F-91406 Orsay Cedex (France)

Detailed {alpha}-decay studies of the neutron-deficient isotope {sup 194}At have been performed in the complete fusion reaction {sup 56}Fe+{sup 141}Pr{yields}{sup 194}At+3n at the velocity filter SHIP. Two {alpha}-decaying isomeric states with half-lives of T{sub 1/2}({sup 194}At{sup m1})=310(8) ms and T{sub 1/2}({sup 194}At{sup m2})=253(10) ms were identified in this nucleus. Their complex decays to the states in the daughter nucleus {sup 190}Bi are discussed in the article. We propose that similar to the case of the neighboring {sup 191,192,193,195}At isotopes, the oblate-deformed configurations based on the proton 1/2{sup +}[440] and/or 7/2{sup -}[514] Nilsson orbitals become important in {sup 194}At. A new isomeric state with the half-life of 175(8) ns was observed in {sup 190}Bi.

• OSTI ID: 21289914
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevC.79.064320; (c) 2009 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 191
ASTATINE 192
ASTATINE 193
ASTATINE 194
ASTATINE 195
BISMUTH 190
DAUGHTER PRODUCTS
HALF-LIFE
HEAVY ION FUSION REACTIONS
IRON 56 TARGET
NEUTRON-DEFICIENT ISOTOPES
PRASEODYMIUM 141
PROTONS
VELOCITY