GAMMA-ALPHA REACTIONS IN THE LIGHT NUCLEI OF NUCLEAR EMULSIONS
Ilford E.1 nuclear emulsions were loaded with various amourts of glycerine to vary the content of carbon and of oxygen and were then irradiated in the beam of the University of Saskatchewan betatron. The numbers of single alpha- particle tracks and of four-pronged alpha-particle stars were correlated to the oxygen contert of the plates, and the number of three-pronged stars to the carbon content. The yields for the reactions /sup 16/O( gamma , alpha )/sup 12/C, /sup 16/O( gamma 4 aa) and /sup 12/C( gamma ,3 alpha ) for bremsstrahlung of 24-Mev maximum energy were found without confusion with reactions in other nuclides of the emulsion and without having to rely on momentum balances for identification of the events. It was shown that the method of identification of /sup 16/O( gamma , alpha )/sup 12/C everts by the measurement of the track of the /sup 12/C was not reliable. The large number of alpha tracks in the energy range 4 to 5 Mev, few of which showed a /sup 12/C track, was shown to be due largely to reactions in /sup 16/O. It was possible, by irradiating emulsions at 17- and at 24-Mev maximum bremsstrahlung energy, to find the energy levels in /sup 16/O and in /sup 12/C through which the reactions passed. (auth)
- Research Organization:
- Univ. of Saskatchewan, Saskatoon
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-18-021224
- OSTI ID:
- 4008931
- Journal Information:
- Canadian Journal of Physics (Canada), Journal Name: Canadian Journal of Physics (Canada) Vol. Vol: 42; ISSN CJPHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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