Neutron-hole strengths and core coupling in /sup 87/Sr via the /sup 88/Sr(/sup 3/He,. cap alpha. )/sup 87/Sr reaction

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.82· OSTI ID:6552908

Fortier, S; Gales, S; Hourani, E; Maison, J M; Massolo, C P; Schapira, J P

Neutron-hole states in /sup 87/Sr were studied by means of the /sup 88/Sr(/sup 3/He,..cap alpha..)/sup 87/Sr reaction at 36 MeV. Angular distribution measurements were carried out from 3/sup 0/ to 41/sup 0/ (lab) and analyzed with the zero-range distorted-wave Born approximation method. Spectroscopic factors have been determined for about 50 discrete levels in /sup 87/Sr located below 6 MeV excitation energy and for the three lowest isobaric analog states 2p(3/2, 1f(5/2, and 2p(1/2 observed around 11 MeV. Many l = 1 and l = 3 discrete levels are observed in the 3--6 MeV excitation energy range. In addition, a large part of the 1f-2p strength is found to lie in the higher-lying continuum up to 13 MeV (about 10% and 40% for the l = 1 and 3 contributions, respectively). The distribution of the 1f-2p neutron-hole strength is compared to previous data on neighboring nuclei /sup 89/Zr and /sup 91/Mo. In addition, angular distributions for some low-lying high-spin states in /sup 87/Sr are nicely reproduced by coupled-channel calculations which assume pure two-step (inelastic plus g(9/2 transfer) processes. Spin-parity assignments are proposed for the levels at 1.92 MeV ((7/2/sup +/), 2.16 MeV ((11/2/sup +/), 2.55 MeV ((9/2/sup -/), and 2.60 MeV ((13/2/sup -/), on the basis of this coupled-channel analysis.

• Research Organization: Institut de Physique Nucleaire, 91406 Orsay Cedex, France
• OSTI ID: 6552908
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651620* -- Nuclear Properties & Reactions
A=59-89
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA PARTICLES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DATA
DIRECT REACTIONS
DISTRIBUTION
DWBA
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HELIUM 3 REACTIONS
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOBARIC ANALOGS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ONE-NUCLEON TRANSFER REACTIONS
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
PICKUP REACTIONS
RADIOISOTOPES
SPECTROSCOPIC FACTORS
SPIN
STABLE ISOTOPES
STRONTIUM 87
STRONTIUM 88 TARGET
STRONTIUM ISOTOPES
TARGETS
TRANSFER REACTIONS