Shape coexistence near the N=38 shell gap: Magnetic moment of the 981.6 keV J{sup {pi}=}8{sup +} level in {sup 72}As
- National Institute for Physics and Nuclear Engineering, R-077125, Bucharest-Magurele (Romania)
We report on the first determination of the magnetic moment of the 981.1 keV, J{sup {pi}=}8{sup +} level in {sup 72}As, a nucleus that belongs to the A{approx_equal}70 mass region dominated by rapidly changing deformations and shapes. The 8{sup +} level is the bandhead of a collective sequence of positive parity levels coexisting with low-spin and medium-spin spherical shell-model states. The magnetic moment was measured by the time-integral perturbed angular distributions method to be {mu}=-(4.272{+-}0.280){mu}{sub N}. This value is in disagreement with the presumed [{pi}(1g{sub 9/2}),{nu}(1g{sub 9/2})] configuration and points to a more complex configuration involving two neutrons in the 1g{sub 9/2} orbital.
- OSTI ID:
- 21419605
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevC.82.044313; (c) 2010 The American Physical Society; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANGULAR DISTRIBUTION
ARSENIC 72
COMPLEXES
DEFORMATION
INTEGRALS
KEV RANGE 100-1000
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PARITY
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SHELL MODELS
SHELLS
SPHERICAL CONFIGURATION
SPIN
ANGULAR MOMENTUM
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BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CONFIGURATION
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
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ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
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NUCLEAR MODELS
NUCLEI
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PARTICLE PROPERTIES
RADIOISOTOPES