Spin dipole and quadrupole resonances in sup 40 Ca

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.1877· OSTI ID:5120520

Baker, F T; Love, W G ^[1]; Bimbot, L ^[2]; Fergerson, R W; Glashausser, C; Green, A ^[3]; Jones, K ^[4]; Nanda, S ^[5]

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1. The University of Georgia, Athens, GA (USA)
2. The University of Paris, Orsay, (France)
3. Rutgers University, New Brunswick, NJ (USA)
4. Los Alamos National Laboratory, Los Alamos, NM (USA)
5. Continuous Electron Beam Accelerator Facility, Newport News, VA (USA) The University of Georgia, Athens, GA (USA)

Angular distributions of the double differential cross section {ital d}{sup 2}{sigma}/d{Omega} dE({sigma}) and the spin-flip probability {ital S}{sub {ital nn}} have been measured for inclusive proton inelastic scattering from {sup 40}Ca at 319 MeV. Excitation energies ({omega}) up to about 40 MeV have been investigated over the angular range from 3.5{degree} to 12{degree} in the laboratory (0.3 to 0.9 fm{sup {minus}1}). Here, multipole decompositions of angular distributions of {sigma}{ital S}{sub {ital nn}} for the {sup 40}Ca({ital {rvec p}},{ital {rvec p}} {prime}) reaction at 319 MeV have been performed in order to compare {Delta}{ital S}=1 strength observed with sum rules. In contrast to the well-known quenching of Gamow-Teller and {ital M}1 resonances, the spin-dipole resonance has a total measured strength which is larger than that predicted by the energy-weighted sum rule. The spin-dipole strength distribution supports asymmetric widths predicted by calculations including 2p-2h mixing. The spin-quadrupole resonance is observed near {omega}=35 MeV and its total strength for {omega}{lt}40 MeV estimated.

• OSTI ID: 5120520
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Journal Name: Physical Review (Section) C: Nuclear Physics; (USA) Vol. 40:5; 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
ANGULAR MOMENTUM
BARYON REACTIONS
BEAMS
BORN APPROXIMATION
CALCIUM 40
CALCIUM 40 TARGET
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EVEN-EVEN NUCLEI
GAMOW-TELLER RULES
GIANT RESONANCE
HADRON REACTIONS
INELASTIC SCATTERING
ISOTOPES
LAMPF LINAC
LIGHT NUCLEI
LINEAR ACCELERATORS
M1-TRANSITIONS
MESON FACTORIES
MEV RANGE
MEV RANGE 100-1000
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTICLE PROPERTIES
POLARIZED BEAMS
POLARIZED PRODUCTS
PROTON REACTIONS
QUADRUPOLE MOMENTS
RESONANCE
SCATTERING
SPIN
STABLE ISOTOPES
SUM RULES
TARGETS