Level structure of the shell-model nucleus [sup 217]At

Journal Article · Wed Mar 01 00:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.1192· OSTI ID:6403414

Sheline, R K ^[1]; Liang, C F; Paris, P ^[2]

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1. Chemistry and Physics Departments, Florida State University, Tallahassee, Florida 32306 (United States)
2. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, IN2P3, Centre National de la Recherche Scientifique, Batiment 104, 91405 Campus Orsay (France)

Alpha recoil separation of a large number of [sup 221]Fr sources from a pure almost massless source of [sup 225]Ac made possible the study of the level structure of [sup 217]At following alpha decay from [sup 221]Fr. Alphas in coincidence with all gammas and gammas and electrons in coincidence with [sup 221]Fr alphas were used in this study. The levels in [sup 217]At can be interpreted in terms of the [pi]([ital h][sub 9/2])[sup 3] [nu]([ital g][sub 9/2])[sup [minus]4], [pi]([ital h][sub 9/2])[sup 2] f[sub 7/2] [nu]([ital g][sub 9/2])[sup [minus]4], and [pi]([ital h][sub 9/2])[sup 2] [ital i][sub 13/2] [nu]([ital g][sub 9/2])[sup [minus]4] shell-model configurations. Considerable similarity in the configurations and energies of the states of [sup 217]At and [sup 215]At is observed. The only change is in the neutron part of the configurations where the particle'' partial configuration in [sup 215]At (...[nu]([ital g][sub 9/2])[sup 4]) is replaced by the hole'' partial configuration in [sup 217]At (...[nu]([ital g][sub 9/2])[sup [minus]4]). No evidence for parity doublets is found in [sup 217]At.

• OSTI ID: 6403414
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 51:3; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASTATINE 217
ENERGY LEVELS
FRANCIUM 221
ALPHA DECAY
SHELL MODELS
COINCIDENCE METHODS
NEUTRONS
PARITY
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
ASTATINE ISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COUNTING TECHNIQUES
DECAY
ELEMENTARY PARTICLES
FERMIONS
FRANCIUM ISOTOPES
HADRONS
HEAVY NUCLEI
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MATHEMATICAL MODELS
MILLISEC LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
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