Identification of 4[sup [minus]] states in the [sup 14]C([ital p],[ital n])[sup 14]N reaction at 135 MeV

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.289· OSTI ID:7180599

Garcia, L A.C.; Anderson, B D; Manley, D M; Baldwin, A R; Pourang, R; Steinfelds, E; Watson, J W ^[1]; Lindgren, R A; Clausen, B L ^[2]; Bacher, A D; Foster, C C ^[3]

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1. Department of Physics and Center for Nuclear Research, Kent State University, Kent, Ohio 44242 (United States)
2. Institute of Nuclear and Particle Physics and Department of Physics, Univesity of Virginia, Charlottesville, Virginia 22901 (United States)
3. Indiana University Cyclotron Facility, Bloomington, Indiana 47405 (United States)

Neutron time-of-flight spectra were measured for the [sup 14]C([ital p],[ital n])[sup 14]N reaction at 135 MeV with the beam-swinger system at the Indiana University Cyclotron Facility. Excitation-energy spectra and differential cross sections for the observed excitations in this reaction were extracted over the momentum transfer range from 0 to 2.5 fm[sup [minus]1]. The goal of this work is to identify the 4[sup [minus]] states in [sup 14]N and to determine the isovector transition strengths. The identification of the 4[sup [minus]] states is based on comparisons of the theoretical differential cross sections, performed in a DWIA formalism, with the experimental cross sections and with information from the [sup 14]C([ital e],[ital e][prime]) reaction. Isospin assignments are based primarily on comparisons of the measured ([ital p],[ital n]) and ([ital e],[ital e][prime]) isovector strengths. Candidate 4[sup [minus]] states are identified at excitation energies of 8.49 MeV ([ital T]=0), 13.76 MeV and 19.49 MeV ([ital T]=1), and 26.61 MeV ([ital T]=2) in the [sup 14]C([ital p],[ital n])[sup 14]N reaction, and the isovector strengths for the transitions leading to these states re extracted. The observed excitation energies and isovector strengths are in good agreement with the analog [ital T]=1 and [ital T]=2 4[sup [minus]] states observed in the ([ital e],[ital e][prime]) reaction. The experimental results are compared with results from shell-model calculations.

• OSTI ID: 7180599
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:1; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
CARBON 14 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRONS
ISOTOPES
ISOVECTORS
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MOMENTUM TRANSFER
NEUTRONS
NITROGEN 14
NITROGEN ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
SHELL MODELS
SPIN
STABLE ISOTOPES
TARGETS
TENSORS
TIME-OF-FLIGHT METHOD
TRANSITION AMPLITUDES
VECTORS