Structure investigation with the (p,t) reaction on {sup 132,134}Ba nuclei

Journal Article · Fri Jan 15 04:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.014304· OSTI ID:21386534

Pascu, S; Cata-Danil, Gh ^[1]; Bucurescu, D ^[1]; Marginean, N; Zamfir, N V ^[1]; Mueller, C ^[2]; Graw, G; Gollwitzer, A; Hofer, D; Valnion, B D ^[3]

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1. National Institute for Physics and Nuclear Engineering, RO-77125 Bucharest-Magurele (Romania)
2. Physics Department, Politehnica University of Bucharest, RO-060042 Bucharest (Romania)
3. Fakultaet fuer Physik der Universitaet Muenchen, D-85748 Garching (Germany)

The low-lying excited states in {sup 132,134}Ba isotopes have been studied with high-resolution (p,t) reactions. The experiments were performed at the Munich Q3D spectrograph with a 25-MeV proton beam and the 1.5-m-long focal plane detector. The high-resolution triton spectra allowed the observation of levels up to {approx}4 MeV. The experimental results revealed 75 excited states in {sup 134}Ba and 79 in {sup 132}Ba, many of them observed for the first time. The measured angular distributions compared with distorted-wave Born approximation calculations allowed spin assignments for these levels in most cases. The systematics of the monopole and quadrupole two-neutron transfer strengths is compared with the prediction of the interacting boson approximation model. The results indicate a transitional structure in {sup 132}Ba and {sup 134}Ba and contribute additional evidence in favor of a description between the U(5) and O(6) symmetries of the model.

• OSTI ID: 21386534
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALLOCATIONS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
APPROXIMATIONS
BARIUM 132
BARIUM 134
BARIUM ISOTOPES
BARYON REACTIONS
BEAMS
BORN APPROXIMATION
CALCULATION METHODS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
DWBA
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITED STATES
FORECASTING
HADRON REACTIONS
INTERACTING BOSON MODEL
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MONOPOLES
NEUTRON TRANSFER
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON BEAMS
NUCLEON REACTIONS
PARTICLE BEAMS
PARTICLE PROPERTIES
PROTON BEAMS
PROTON REACTIONS
RESOLUTION
SHELL MODELS
SPECTRA
SPIN
STABLE ISOTOPES
SYMMETRY
TRITONS