Structures of {sup 201}Po and {sup 205}Rn from EC/{beta}{sup +}-decay studies

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024322· OSTI ID:21386602

Deo, A Y; Podolyak, Zs; Walker, P M; Farrelly, G; Gelletly, W ^[1]; Algora, A ^[2]; Rubio, B; Agramunt, J; Estevez, E ^[2]; Fraile, L M ^[3]; Al-Dahan, N ^[1]; Alkhomashi, N ^[1]; Briz, J A; Maira, A ^[4]; Herlert, A ^[5]; Koester, U ^[6]; Singla, S ^[7]

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1. Department of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom)
2. IFIC, CSIC - Universidad de Valencia, E-46071 (Spain)
3. Grupo de Fisica Nuclear, Facultad CC. Fisicas, Universidad Complutense, E-28040 Madrid (Spain)
4. Instituto de Estructura de la Materia, CSIC, E-28006 Madrid (Spain)
5. ISOLDE, PH Department, CERN, CH-1211 Geneva (Switzerland)
6. Institut Laue Langevin, 6 rue Jules Horowitz, F-38042 Grenoble Cedex 9 (France)
7. Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110 016 (India)

Several low-lying excited states in {sub 86}{sup 205}Rn{sub 119} and {sub 84}{sup 201}Po{sub 117} were identified for the first time following EC/{beta}{sup +} decay of {sup 205}Fr and {sup 201}At, respectively, using {gamma}-ray and conversion electron spectroscopy at the CERN isotope separator on-line (ISOLDE) facility. The EC/{beta}{sup +} branch from {sup 205}Fr was measured to be 1.5(2)%. The excited states of the daughter nuclei are understood in terms of the odd nucleon coupling to the neighboring even-even core. The neutron single-particle energies of the p{sub 3/2} orbital relative to the f{sub 5/2} ground state in {sup 205}Rn, and the f{sub 5/2} orbital relative to the p{sub 3/2} ground state in {sup 201}Po, were determined to be 31.4(2) and 5.7(3) keV, respectively. We tentatively identify a (13/2){sup +} isomeric level at 657.1(5) keV in {sup 205}Rn. The systematic behavior of the (13/2){sup +} and (3/2){sup -} levels is also discussed.

• OSTI ID: 21386602
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CERN
CONVERSION
COUPLING
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON SPECTROSCOPY
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EQUIPMENT
EVEN-ODD NUCLEI
EXCITED STATES
FERMIONS
FRANCIUM 205
FRANCIUM ISOTOPES
GAMMA RADIATION
GROUND STATES
HADRONS
HEAVY NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
INTERNATIONAL ORGANIZATIONS
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPE SEPARATORS
ISOTOPES
KEV RANGE
MINUTES LIVING RADIOISOTOPES
NEUTRONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
POLONIUM 201
POLONIUM ISOTOPES
RADIATIONS
RADIOISOTOPES
RADON 205
RADON ISOTOPES
SECONDS LIVING RADIOISOTOPES
SEPARATION EQUIPMENT
SPECTROSCOPY