Giant electric resonances in /sup 58/Ni studied by alpha particle capture

Journal Article · Sun Jan 01 00:00:00 EST 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.17.56· OSTI ID:5038682

Meyer-Schuetzmeister, L; Segel, R E; Raghunathan, K; Debevec, P T; Wharton, W R; Rutledge, L L; Ophel, T R

The reaction /sup 54/Fe(..cap alpha..,..gamma../sub 0/)/sup 58/Ni has been studied for 7.6 > or = E/sub b/MeV. Seventeen angular distributions have been measured in this energy region making it possible to separate the E2 strength from the E1 strength. The E1 cross section reaches a maximum at about the expected energy. A compact E2 resonance was observed which agrees quite well with the one measured by inelastic ..cap alpha.. scattering, with a peak cross section at about 16 MeV and a width of approx.3 MeV(half width at half maximum). The observed E1 strength equals 0.9% of the isospin allowed E1 sum rule. The measured E2 strength, however, equals 4.3% of the isoscalar E2 sum rule, which is about the same as the fraction of the total E1 strength in /sup 58/Ni excited by proton capture. Assuming only statistical processes and applying the Hauser-Feshbach formula to calculate the total ..gamma.. absorption from the measured particle-capture cross sections leads to the conclusion that the (..cap alpha..,..gamma..) reaction exciting the isoscalar giant quadrupole resonance and the (p,..gamma..) reaction exciting the giant dipole resonance must have direct components.

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5038682
• Journal Information: Phys. Rev., C; (United States), Vol. 17:1
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
CAPTURE
INELASTIC SCATTERING
IRON 54 TARGET
NICKEL 58
GIANT RESONANCE
ABSORPTION
ANGULAR DISTRIBUTION
CROSS SECTIONS
GAMMA RADIATION
HAUSER-FESHBACH THEORY
MEV RANGE 01-10
MEV RANGE 10-100
SUM RULES
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EQUATIONS
EVEN-EVEN NUCLEI
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MEV RANGE
NICKEL ISOTOPES
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEI
RADIATIONS
RESONANCE
SCATTERING
STABLE ISOTOPES
TARGETS
651523* - Nuclear Properties & Reactions
A=39-58
Experimental- Energy Levels & Transitions- (-1987)
651525 - Nuclear Properties & Reactions
A=39-58
Experimental- Nuclear Reactions & Scattering- (-1987)