sup 30 Si( sup 3 He, d ) sup 31 P reaction at 25 MeV

Journal Article · Tue May 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.1956· OSTI ID:7095757

Vernotte, J; Khendriche, A; Berrier-Ronsin, G; Grafeuille, S; Kalifa, J; Rotbard, G ^[1]; Tamisier, R ^[2]; Wildenthal, B H ^[3]

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1. Institut de Physique Nucleaire, B.P.1, 91406 Orsay CEDEX, (France)
2. Institut de Physique Nucleaire, B.P.1, 91406 Orsay CEDEX, (France) Laboratoire de Physique de Nantes, 2 rue de la Houssiniere, 44072 Nantes CEDEX 03, (France)
3. Department of Physics and Astronomy, University of New Mexico, 800 Yale NE, Albuquerque, New Mexico 87131 (USA)

The {sup 30}Si({sup 3}He,{ital d}){sup 31}P reaction has been investigated at 25 MeV incident energy. About 80 levels were observed up to an excitation energy of 10 MeV by using a split-pole magnetic spectrograph. Most of the proton-unbound states were identified with resonance levels observed in proton capture reactions on {sup 30}Si. Four levels were observed for the first time in a reaction which couples a proton to a {sup 30}Si core. Spectroscopic information has been obtained for about 60 levels through angular distribution measurements and distorted wave Born approximation analyses, with special treatment applied in the cases of the proton-unbound states. The spectroscopic factors of the proton-unbound states are in overall agreement with the spectroscopic factors which are deduced from the proton partial widths measured in resonant proton scattering experiments, but the proton partial width which is obtained in this work for the 7897 keV level is in disagreement with previous values from {gamma}-ray resonant absorption measurements. The strengths of the {ital l}=0, 2, and 3 transfers are essentially concentrated into one level, each of isospin {ital T}=1/2 and {ital T}=3/2. In contrast the {ital l}=1,{ital T}=1/2, strength is distributed over many levels, especially in a cluster of six levels between 9.0 and 9.8 MeV. The sum rule for the 2{ital p}{sub 3/2},{ital T}=1/2, proton single-particle strength is exhausted, leading to a centroid energy of about 7.9 MeV for this configuration. Isospin assignments are discussed for some levels. The excitation energies and spectroscopic factors for even-parity states are compared with the results of a recent, complete {ital sd}-shell space, shell-model calculation.

• OSTI ID: 7095757
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:5; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERONS
DIRECT REACTIONS
DISTRIBUTION
DWBA
ELECTROSTATIC ACCELERATORS
ENERGY LEVELS
ENERGY RANGE
EQUATIONS
HELIUM 3 REACTIONS
ISOSPIN
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
ONE-NUCLEON TRANSFER REACTIONS
PARITY
PARTICLE PROPERTIES
PHOSPHORUS 31
PHOSPHORUS ISOTOPES
SHELL MODELS
SILICON 30 TARGET
SPECTROSCOPIC FACTORS
SPIN
STABLE ISOTOPES
STRIPPING
SUM RULES
TARGETS
TRANSFER REACTIONS
VAN DE GRAAFF ACCELERATORS