GAMMA RAYS FROM PROTON BOMBARDMENT OF ARGON
Journal Article
·
· Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B
Gamma rays from the proton bombardment of argon were investigated using NaI(Tl) scintillators. The proton energy was about 5.6 Mev. Coincidence measurements with inelastically scattered proton groups were performed. The branching ratios of the decays from each excited state of Ar/sup 40/ were determined. Direct transition from the 2nd to the ground states could not be observed. Angular correlation between the gamma ray from the 2nd to the 1st states of Ar/sup 40/ and the proton group leading to the 2nd state of Ar/sup 40/ was measured. The distribution was isotropic within a statistical error, about 4%. Gamma-gamma angular correlation between the cascade gamma rays from the 2nd state was measured. The result agreed with the calculated correlation curve of a 0-2-0 spin sequence. It was concluded that the spin of the 2nd state of Ar/sup 40/ was 0/sup +/. From the comparison of the observed branching ratios with the Moszkowski's single particle estimates, the 3rd state could have a spin of 1 or 2 and the 9th and the 11th states could have spins of 1 or 2 and 0, 1, or 2, respectively. From the result of neutron-gamma coincidence measurement, intense gamma rays of 0.77 and 1.14 Mev in the single spectra were found to be produced by the transitions between the states of K/sup 40/ formed by the reaction Ar/sup 40/ (p,n)K/sup 40/. (auth)
- Research Organization:
- Osaka Univ.
- NSA Number:
- NSA-17-013512
- OSTI ID:
- 4751455
- Journal Information:
- Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B, Journal Name: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B Vol. Vol: 39; ISSN NUPHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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