Neutron pickup strength in sup 87 Sr from the ( rvec p , d ) reaction

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.1603· OSTI ID:5460222

Radhakrishna, M C; Puttaswamy, N G; Nann, H; Miller, D W; Singh, P P; Jacobs, W W; Jones, W P; Stephenson, E J ^[1]

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1. Department of Physics and Indiana University Cyclotron Facility, Bloomington, Indiana 47405 (US)

Differential cross section and analyzing power angular distributions have been obtained for the {sup 87}Sr({ital {rvec p}},{ital d}){sup 86}Sr reaction in two measurements using different magnetic spectrometers at incident proton energies of 94.2 and 91.8 MeV. Typical energy resolutions of 70 and 40 keV, respectively, were achieved. Optical-model parameters were obtained by fitting the elastic scattering data measured to laboratory angles of 90{degree} for protons at 94.2 MeV and to 120{degree} for deuterons at 88.0 MeV. Standard exact finite range distorted-wave Born approximation calculations using these optical-model parameters failed to describe the experimental data, while the adiabatic approximation improved the description to some extent. Orbital and total angular momenta, {ital l} and {ital j}, of the picked-up neutron were extracted from the angular distributions of the differential cross section and analyzing power for all the residual states observed. The rms radius of the 1{ital g}{sub 9/2} neutron orbital, obtained from magnetic electron scattering, was used in the extraction of strength for this orbital, while rms radii from Hartree-Fock calculations were used for the 2{ital p}{sub 1/2}, 2{ital p}{sub 3/2}, 1{ital f}{sub 5/2}, and 1{ital f}{sub 7/2} orbitals. The observed 1{ital g}{sub 9/2} strength, spread over 20 states up to 5.4-MeV excitation, indicates a depletion of about 43% compared to simple shell-model expectations. Similarly, the observed 1{ital f}{sub 5/2} strength, spread over 17 states, indicates a depletion of about 32%. The weighted summed spectroscopic strength for the 1{ital g}{sub 9/2} orbital, deduced from the present study, is lower than that obtained from magnetic electron scattering.

• OSTI ID: 5460222
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Vol. 40:4; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
PROTON REACTIONS
PICKUP REACTIONS
STRONTIUM 87 TARGET
ANALYZING POWER
ANGULAR DISTRIBUTION
DEUTERONS
DIFFERENTIAL CROSS SECTIONS
DWBA
ELASTIC SCATTERING
ELECTRONS
MEV RANGE 10-100
OPTICAL MODELS
POLARIZED BEAMS
SCATTERING
STRONTIUM 86
ALKALINE EARTH ISOTOPES
BARYON REACTIONS
BEAMS
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIRECT REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONS
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
STABLE ISOTOPES
STRONTIUM ISOTOPES
TARGETS
TRANSFER REACTIONS
651620* - Nuclear Properties & Reactions
A=59-89
Experimental