New short-lived isomers in {sup 84}Y

Journal Article · Sat Oct 01 00:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.044313· OSTI ID:20699059

Ionescu-Bujor, M; Iordachescu, A; Bucurescu, D; Marginean, N ^[1]

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1. National Institute for Physics and Nuclear Engineering, Bucharest (Romania)

Low-lying short-lived isomeric states have been investigated in {sup 84}Y by the {sup 84}Sr(p,n) reaction at E{sub p}=13.5 MeV. The g factors were measured by applying the time-differential perturbed angular distribution method in an external magnetic field. The properties determined for the new isomers are E{sub x}=112.4 keV, I{sup {pi}}=(4{sup +}),T{sub 1/2}=79(2) ns, g=+0.578(7);E{sub x}=210.4 keV, I{sup {pi}}=(4{sup -}),T{sub 1/2}=292(10) ns, g=+0.234(6). On the basis of the measured g factor, the {pi}1g{sub 9/2}x{nu}1g{sub 9/2} configuration has been assigned to the 4{sup +} isomeric state. The low-lying states in {sup 84}Y were discussed within the two-quasiparticles plus rotor model. The 4{sup -} isomeric state has been interpreted by the pure {pi}[301]3/2x{nu}[422]5/2 configuration, which reproduces the experimental g factor at a prolate quadrupole deformation of {epsilon}{sub 2}{approx_equal}0.16.

• OSTI ID: 20699059
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 72, Issue 4; Other Information: DOI: 10.1103/PhysRevC.72.044313; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
COLLECTIVE MODEL
DEFORMED NUCLEI
ENERGY LEVELS
ISOMERIC NUCLEI
KEV RANGE
LANDE FACTOR
MAGNETIC FIELDS
MEV RANGE
NEUTRONS
NUCLEAR DEFORMATION
PARTICLE-CORE COUPLING MODEL
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
QUADRUPOLES
QUASI PARTICLES
STRONTIUM 84 TARGET
YTTRIUM 84