$sup 56$Fe($alpha$$,$$gamma$$)$$sup 60$Ni reaction at excitation energies in the region of the giant dipole resonance
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, Other Information: Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
Experimental)-Nuclear Properties & Reactions
39 <= A <= 58-Nuclear Reactions & Scattering
*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
PARITY
SPIN