{alpha} decay of {sup 216}Fr and {sup 212}At

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.2304· OSTI ID:389414

Liang, C F; Paris, P ^[1]; Sheline, R K; Alexa, P ^[2]; Gizon, A ^[3]

---

1. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Batiment 104, 91405 Campus Orsay (France)
2. Departments of Chemistry and Physics, Florida State University, Tallahassee, Florida 32306 (United States)
3. Institut des Sciences Nucleaire, IN2P3, Universite Joseph Fourier, F-38026 Grenoble (France)

The alpha and coincident gamma decays of {sup 216}Fr and {sup 212}At in secular equilibrium with 0.8 s {sup 224}Pa and 26.1 ms {sup 220}Ac have been studied with emphasis on the level scheme of {sup 212}At. The level structure has been interpreted in terms of the shell model configurations {pi}({ital h}{sub 9/2}){sub 9/2}{sup 3}{nu}({ital g}{sub 9/2}), {pi}({ital h}{sub 9/2}){sub 0+}{sup 2}({ital f}{sub 7/2}){nu}({ital g}{sub 9/2}), and {pi}({ital h}{sub 9/2}){sub 9/2}{sup 3}{nu}({ital i}{sub 11/2}). These configurations are then compared with the calculated configurations in {sup 212}At and with the corresponding experimental configurations in {sup 210}Bi and {sup 212}Bi. In all three cases plots of the experimental energies vs the spin show the expected inverted parabola shape, but as we move farther away from the {sup 208}Pb closed shells, the inverted parabolas become more compressed. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 389414
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ACTINIUM 230
ALPHA DECAY
ASTATINE 212
BISMUTH 210
BISMUTH 212
ENERGY LEVELS
EQUILIBRIUM
FRANCIUM 216
GAMMA DECAY
LEAD 208
PROTACTINIUM 224
SHELL MODELS