Deexcitation. gamma. rays following the photodisintegration of /sup 17/O

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.40.59· OSTI ID:6013503

O'Rielly, G V; Zubanov, D; Thompson, M N

Bremsstrahlung-weighted integrated cross sections for photoproton and photoneutron emission from /sup 17/O to excited residual states in /sup 16/N and /sup 16/O have been measured by detecting the deexcitation ..gamma.. rays emitted from these states in the residual nuclei. The results are compared with the previously reported /sup 17/O(..gamma..,/ital p/) and /sup 17/O(..gamma..,/ital n/) cross sections. About 90% of photoproton emission from /sup 17/O populates the ground-state (2/sup /minus//) and the 0.298-MeV (3/sup /minus//) level in /sup 16/N. It is concluded that this is the result of a single-particle excitation and emission process. The remaining photoproton emission, leading to the 0.120-MeV (0/sup /minus//) and 0.397-MeV (1/sup /minus//) levels, occurs during the preequilibrium stage or from the compound nucleus. The results further indicate that these decay fractions are approximately independent of excitation energy in /sup 17/O. For the /sup 17/O(..gamma..,/ital n/)/sup 16/O reaction, the results show that emission to bound states in /sup 16/O is predominantly to the /sup 16/O ground state (0/sup +/), with 4% of the decay from the /sup 17/O giant dipole resonance going to the 6.13-MeV (3/sup /minus//) excited state; population of other bound states is not observed.

• Research Organization: School of Physics, University of Melbourne, Parkville, Victoria 3052, Australia(AU)
• OSTI ID: 6013503
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 40:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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