Fine structure in the alpha-decay of the neutron-deficient {sup 191}Po isotope

Journal Article · Mon Dec 21 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57245· OSTI ID:21207792

Andreyev, A N; Bijnens, N; Huyse, M; Van Duppen, P ^[1]; Cocks, J F; Helariutta, K; Kettunen, H; Kuusiniemi, P; Leino, M; Trzaska, W H ^[2]; Eskola, K ^[3]; Wyss, R ^[4]

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1. Instituut voor Kern- en Stralingsfysica, University of Leuven, B-3001 Leuven (Belgium)
2. Department of Physics, University of Jyvaeskylae, FIN-40351 Jyvaeskylae (Finland)
3. Department of Physics, University of Helsinki, Helsinki (Finland)
4. Royal Institute of Technology, Department of Physics Frescati, Kungl. Frescativ. 24, 104 05 Stockholm (Sweden)

The {alpha}-decay properties of the neutron-deficient {sup 191}Po nucleus have been investigated at the RITU gas-filled separator using the {sup 36}Ar+{sup 160}Dy{yields}{sup 191}Po+5n reaction channel. In contrast to previous studies two {alpha}-decaying isomeric states were observed in {sup 191}Po. By analysing {alpha}-{gamma} coincidences for both isomers evidence was found for fine-structure decay to excited levels in the {sup 187}Pb daughter nucleus. The tentative interpretation of these levels could be a weak coupling of the odd neutron to an intruder 2p-2h deformed 0{sup +} state in the even-even core. The difference in the reduced {alpha} widths of the {alpha} transitions towards the ground state and excited state points to a deformed 13/2{sup +} isomeric state in {sup 191}Po.

• OSTI ID: 21207792
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 455; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALPHA PARTICLES
ARGON 36 REACTIONS
COINCIDENCE SPECTROMETRY
COUPLING
DYSPROSIUM 160 TARGET
EXCITED STATES
FINE STRUCTURE
GAMMA SPECTRA
GROUND STATES
ISOMERIC NUCLEI
LEAD 187
NEUTRONS
NUCLEAR STRUCTURE
POLONIUM 191