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

Journal Article · · Nucl. Phys., A, v. A220, no. 3, pp. 505-519
OSTI ID:4353032
; ; ;

Excitation functions for the /sup 56/Fe( alpha , gamma /sub o/)/sup 60/ Ni and /sup 5 6/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, gg/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 throug h 1-. 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. (auth)

Research Organization:
Australian National Univ., Canberra
NSA Number:
NSA-29-025563
OSTI ID:
4353032
Journal Information:
Nucl. Phys., A, v. A220, no. 3, pp. 505-519, Journal Name: Nucl. Phys., A, v. A220, no. 3, pp. 505-519; ISSN NUPAB
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

*ALPHA REACTIONS-- CAPTURE
*COBALT 59-- PROTON REACTIONS
*IRON 56-- ALPHA REACTIONS
*NICKEL 60-- ENERGY LEVELS
*PROTON REACTIONS-- CAPTURE
ANGULAR DISTRIBUTION
CROSS SECTIONS
DIPOLES
ERICSON THEORY
EXCITATION
EXCITATION FUNCTIONS
FINE STRUCTURE
GAMMA SPECTRA
GIANT RESONANCE
ISOSPIN
MEV RANGE 01- 10
MEV RANGE 10-100
N68551* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Nuclear Reactions & Scattering
PARITY
SPIN