Coulomb excitation of {sup 73}Ga

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.064309· OSTI ID:21499261

Diriken, J; Bree, N; Cocolios, T E; Huyse, M; Ivanov, O V; Patronis, N; Pauwels, D; Van Duppen, P ^[1]; Stefanescu, I ^[1]; Balabanski, D ^[2]; Blasi, N; Lo Bianco, G ^[2]; Blazhev, A; Eberth, J; Jolie, J; Reiter, P; Warr, N ^[3]; Cederkaell, J ^[4]; Davinson, T ^[5]; Ekstroem, A ^[6]

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1. Instituut voor Kern- en Stralingsfysica, K.U. Leuven, Celestijnenlaan 200D, B-3001 Leuven (Belgium)
2. Dipartimento di Fisica, Universita di Camerino, I-62032 Camerino (Italy)
3. IKP, University of Cologne, D-50937 Cologne (Germany)
4. ISOLDE, CERN, CH-1211 Geneva 23 (Switzerland)
5. Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
6. Physics Department, University of Lund, Box-118, SE-22100 Lund (Sweden)

The B(E2;I{sub i}{yields}I{sub f}) values for transitions in {sub 31}{sup 71}Ga{sub 40} and {sub 31}{sup 73}Ga{sub 42} were deduced from a Coulomb excitation experiment at the safe energy of 2.95 MeV/nucleon using post-accelerated beams of {sup 71,73}Ga at the REX-ISOLDE on-line isotope mass separator facility. The emitted {gamma} rays were detected by the MINIBALL {gamma}-detector array, and B(E2;I{sub i}{yields}I{sub f}) values were obtained from the yields normalized to the known strength of the 2{sup +}{yields}0{sup +} transition in the {sup 120}Sn target. The comparison of these new results with the data of less neutron-rich gallium isotopes shows a shift of the E2 collectivity toward lower excitation energy when adding neutrons beyond N=40. This supports conclusions from previous studies of the gallium isotopes, which indicated a structural change in this isotopic chain between N=40 and 42. Combined with recent measurements from collinear laser spectroscopy showing a 1/2{sup -} spin and parity for the ground state, the extracted results revealed evidence for a 1/2{sup -},3/2{sup -} doublet near the ground state in {sub 31}{sup 73}Ga{sub 42} differing by at most 0.8 keV in energy.

• OSTI ID: 21499261
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevC.82.064309; (c) 2010 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPARATIVE EVALUATIONS
COULOMB EXCITATION
E2-TRANSITIONS
GALLIUM 71
GALLIUM 73
GAMMA RADIATION
GROUND STATES
LASER SPECTROSCOPY
MASS
MEV RANGE 01-10
NEUTRON-RICH ISOTOPES
NEUTRONS
PARITY
SPIN
TIN 120
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVALUATION
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
GALLIUM ISOTOPES
HADRONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MEV RANGE
MULTIPOLE TRANSITIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
RADIATIONS
RADIOISOTOPES
SPECTROSCOPY
STABLE ISOTOPES
TIN ISOTOPES