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$sup 56$Fe($alpha$$,$$gamma$$)$$sup 60$Ni reaction at excitation energies in the region of the giant dipole resonance

Technical Report ·
OSTI ID:4938596
; ; ;

Excitation functions for the /sup 56/Fe ( alpha , gamma /sub o/)/sup 60/ Ni and /sup 56/Fe( alpha , gamma /sub 1/)/sup 60/Ni reactions were measured at 90 deg to the beam direction over the bombarding energy range 8.0 to 17.6 MeV. Gamma-ray angular distributions were measured at ten bombarding energies. Excitation functions for the /sup 59/Co(p, gamma /sub o/)/sup 60/Ni and /sup 59/ Co(p, gamma /sub 1/)/sup 60/Ni reactions were measured over the range E/sub x/ = 16.58 to 16.92 MeV and compared with the ( alpha , gamma ) data. The angular distribution data indicate that the ( alpha , gamma /sub o/) and ( alpha , gamma / sub 1/) reactions proceed through 1/sup /, and 1/sup -/ and 3/sup -/ states, respectively. The ( alpha , gamma ) excitation functions are discussed with respect to isospin splitting of the /sup 60/Ni giant dipole resonance. The fine structure observed in the excitation functions is shown to be most probably due to Ericson fluctuations. The gross ( alpha , gamma ) cross sections are shown to be in reasonable agreement with the results of calculations made using the theory of Hauser and Feshbach assuming excitation of the giant dipole resonance. (11 figures) (auth)

Research Organization:
Australian National Univ., Canberra. Dept. of Nuclear Physics
Sponsoring Organization:
Sponsor not identified
NSA Number:
NSA-29-025543
OSTI ID:
4938596
Report Number(s):
ANU-P--581
Country of Publication:
Australia
Language:
English

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Related Subjects

ANGULAR DISTRIBUTION
COBALT 59
DIFFERENTIAL CROSS SECTIONS
DIPOLES
ERICSON THEORY
EXCITATION FUNCTIONS
GAMMA RADIATION
GAMMA SPECTRA- - HAUSER-FESHBACH THEORY
GIANT RESONANCE
IRON 56
ISOSPIN
MEV RANGE 01-10
MEV RANGE 10-100
N68551* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Nuclear Reactions & Scattering
N68651 -- Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
59 <= A <= 89-- Nuclear Reactions & Scattering
NICKEL 60 ALPHA REACTIONS
PROTON REACTIONS