Transition strengths and multiple band structure in [sup 82]Sr

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.730· OSTI ID:5225471

Tabor, S L; Doering, J; Holcomb, J W; Johns, G D; Johnson, T D; Petters, T J; Riley, M A; Womble, P C ^[1]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)

High-spin states in [sup 82]Sr were studied using the [sup 56]Fe([sup 29]Si,2[ital pn]) reaction at 95 MeV with a thick 78 mg/cm[sup 2] natural Fe (92% [sup 56]Fe) target. Prompt [gamma]-[gamma] coincidences were measured using three Compton-suppressed Ge detectors at 90[degree] relative to the beam and two at 30[degree]. Directional correlation of oriented nuclei ratios were determined from the 30[degree]-- 90[degree] coincidences to assist in assigning spin changes. Nine new states were found, along with 38 new transitions. The Doppler-shift attenuation method was used to determine the mean lifetimes of 22 states in [sup 82]Sr. The continuum side feeding times into 10 states were determined by comparing the decay line shapes in coincidence with transitions above and below the state under study. The average transition quadrupole moment of 2.8(2) [ital e] b in the ground state band of [sup 82]Sr would correspond to a relatively large axial quadrupole deformation of [beta][sub 2]=0.33, in agreement with theoretical predictions. The excited 2[sup +] band has a higher moment of inertia but a lower transition quadrupole moment of 2.4(2) [ital e] b. In the negative-parity bands the quadrupole moment falls from about 3 to 2 [ital e] b with increasing spin.

• OSTI ID: 5225471
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663220 -- Electromagnetic Transitions-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663540 -- Nuclear Mass Ranges-- A=39-58-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR CORRELATION
BARYONS
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COINCIDENCE SPECTROMETRY
CORRELATIONS
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DEFORMATION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
GAMMA SPECTROSCOPY
GROUND STATES
HADRONS
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HIGH SPIN STATES
INTERMEDIATE MASS NUCLEI
IRON 56 TARGET
ISOTOPES
LIFETIME
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NUCLEAR DEFORMATION
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PROTONS
QUADRUPOLE MOMENTS
RADIOISOTOPES
SILICON 29 REACTIONS
SPECTROSCOPY
STRONTIUM 82
STRONTIUM ISOTOPES
TARGETS