Spin decomposition of the responses of sup 44 Ca and sup 48 Ca to 300 MeV protons

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.44.93· OSTI ID:5654208

Baker, F T; Bimbot, L; Fergerson, R W; Glashausser, C; Green, A; Haeusser, O; Hicks, K; Jones, K; Miller, C A; Vetterli, M; Abegg, R; Beatty, D; Bonin, B; Castel, B; Chen, X Y; Cupps, V; Djalali, C; Henderson, R; Jackson, K P; Jeppesen, R ; Nakayama, K; Nanda, S K; Sawafta, R; Yen, S ^[1]

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1. University of Georgia; Athens; Georgia 30602 (US) Institut de Physique Nucleaire; F-91406 Orsay; France Rutgers University; Piscataway; New Jersey 08854 Simon Fraser University; Burnaby; Canada V5A1S6 TRIUMF; 4004 Westbrook Mall; Vancouver; Canada V6T2A3 Los Alamos National Laboratory; Los Alamos; New Mexico 87544 Centre d'Etudes Nucleaires de Saclay; 91191 Gif sur Yvette; CEDEX; France Queen's University; Kingston; Canada K7L3N6 University of Colorado; Boulder; Colorado 80309 University of South Carolina; Columbia; South Carolina 29208 Continuous Electron Beam Accelerator Facility; 12000 Jefferson Ave.; Newport News; Virginia 23606 University of Alberta; Edmonton; Canada T6G2J1

Angular distributions of the double-differential cross section {ital d}{sup 2}{sigma}/{ital d}{Omega} {ital dE}({sigma}) and the spin-flip probability {ital S}{sub {ital n}{ital n}} have been measured for inclusive proton inelastic scattering from {sup 44}Ca at 290 MeV and from {sup 48}Ca at 318 MeV. Excitation energies up to about 50 MeV for {sup 44}Ca and 40 MeV for {sup 48}Ca have been investigated over the laboratory angular ranges of 3{degree} to 12{degree} for {sup 44}Ca and 3{degree} to 9{degree} for {sup 48}Ca. Multipole decompositions of angular distributions of both the spin-flip cross section {sigma}{ital S}{sub {ital n}{ital n}} and the estimated cross section for {Delta}{ital S}=0 transitions have been performed. Distributions of strengths were deduced for {Delta}{ital L}=1, {Delta}{ital S}=0 (the giant dipole), {Delta}{ital L}=2, {Delta}{ital S}=0 (the giant quadrupole), {Delta}{ital L}=0, {Delta}{ital S}=1 (the magnetic dipole), {Delta}{ital L}=1, {Delta}{ital S}=1 (the spin dipole), and {Delta}{ital L}=2, {Delta}{ital S}=1 (the spin quadrupole). The {Delta}{ital S}=0 summed strengths for {sup 44}Ca are lower than for {sup 40}Ca and {sup 48}Ca. The spin-dipole summed strengths are found to be approximately independent of {ital A}. For {sup 48}Ca, essentially all {ital M}1 strength observed was in the 10.23 MeV 1{sup +} state; for {sup 44}Ca, {ital M}1 strength was observed to be fragmented over a range of 7 to 18 Mev.

• OSTI ID: 5654208
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 44:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651520* -- Nuclear Properties & Reactions
A=39-58
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
BARYON REACTIONS
CALCIUM 44
CALCIUM 44 TARGET
CALCIUM 48
CALCIUM 48 TARGET
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
HADRON REACTIONS
INELASTIC SCATTERING
INTERMEDIATE MASS NUCLEI
ISOCHRONOUS CYCLOTRONS
ISOTOPES
M1-TRANSITIONS
MEV RANGE
MEV RANGE 100-1000
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PROBABILITY
PROTON REACTIONS
QUADRUPOLE MOMENTS
SCATTERING
SPIN FLIP
STABLE ISOTOPES
TARGETS
TRIUMF CYCLOTRON