### ELASTIC SCATTERING OF ALPHA PARTICLES BY C$sup 12$ IN THE BOMBARDING ENERGY RANGE 10 to 19 MevELASTIC SCATTERING OF ALPHA PARTICLES BY C$sup 12$ IN THE BOMBARDING ENERGY RANGE 10 to 19 Mev

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 Author Carter, E. B. ♦ Mitchell, G. E. ♦ Davis, R. G. Source United States Department of Energy Office of Scientific and Technical Information Content type Text Language English
 Subject Keyword PHYSICS ♦ ALPHA PARTICLES ♦ ANGULAR DISTRIBUTION ♦ CARBON 12 ♦ COMPOUND NUCLEI ♦ CONFIGURATION ♦ CROSS SECTIONS ♦ ELASTIC SCATTERING ♦ ENERGY LEVELS ♦ ENERGY RANGE ♦ EXCITATION ♦ MEASURED VALUES ♦ MEV RANGE ♦ NUCLEAR MODELS ♦ NUCLEI ♦ OPTICAL MODEL ♦ OXYGEN 16 ♦ PARITY ♦ PHASE SHIFT ♦ RESONANCE ♦ ROTATION ♦ SCATTERING ♦ SPECTRA ♦ SPIN Abstract The scattering of alpha particles by C/sup 12/ was studied in the bombarding energy range 10 to 19 Mev. Many anomalies were observed in the excitation curves that correspond to O/sup 16/ compound system energy levels in the excitation energy range 14 to 21 Mev. Fifteen detailed angular distributions were measured and the data were analyzed with a smooth cuto of model, which was modified to include appropriate resonant phase shifts. The spins and parities of the more prominent resonances were assigned. Real well depths of 100 Mev or more were required in an optical-model analysis to yield theoretical cross sections comparable with experimental values. In general, opticalmodel fits were not satisfactory. Two series of levels in O/sup 16/ were observed which obey rotational band systematics. The substantial widths of the band members suggest an alpha-particle cluster configuration for these excited states. (auth) ISSN 0031899X Educational Use Research Learning Resource Type Article Publisher Date 1964-03-23 Publisher Department Florida State Univ., Tallahassee Journal Physical Review Volume Number 133 Organization Florida State Univ., Tallahassee