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A STUDY OF THE LEVELS OF P$sup 31$ BY MEANS OF THE Si$sup 30$(p$gamma$) P$sup 31$ REACTION (in Russian)

Journal Article · · Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz.
OSTI ID:4839199
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Thin targets of Si/sup 30/ were irradiated with 1- to 2.7-Mev, monoenergetic protons from an electrostatic generator. The gamma -ray yield was determined by means of a 3 cm x 2 cm CsI (Tl) crystal equipped with a photomultiplier. The gamma -ray spectrum was taken on a 100-channel coincidence scintillation spectrometer. The angular distribution of the gamma -rays was obtained by measuring the spectra at various angles. The gamma -ray yields indicate well-marked resonances at proton energies of E/sub p/ = 1096, 1205, 1326, 1393, 1402, 1482 and 1516 kev which were investigated in greater detail by measuring the gamma -spectra and angular distribution. A spin of 5/2 is assigned to the 8.352-Mev level at a proton energy of 1096 Mev. The gamma -ray angular distribution had the form W = 1 - 0.5 cos/sup 2/ theta . The results of measuring the gamma -ray angular distributions show that all transitions to the first excited The spins of the 8.46-Mev and 8.575-Mev resonance levels are 5/2 at E/sub p/ = 1393 kev. The spin of the 8.647 excitation level is 3/2 at E/sub p/ = 1402 kev. The 8.725-Mev resonance level is the only level showing a direct gamma -transition to the ground state. Its spin is 3/2 at E/sub p/ = 1482 kev. The spin of the 8.758-Mev resonance level at E/sub p/ = 1516 kev can have a value of 1/2 or 3/2. A diagram for the gamma -transitions between these seven resonance levels in P/sup 31/, and the intensities of the transitions are presented. (TTT)

Research Organization:
Inst. of Physics and Tech., Academy of Sciences, USSR
NSA Number:
NSA-15-030014
OSTI ID:
4839199
Journal Information:
Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz., Journal Name: Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz. Vol. Vol: 25
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

ANGULAR DISTRIBUTION
CESIUM IODIDES
COINCIDENCE METHODS
CRYSTALS
DIAGRAMS
DIPOLES
ENERGY LEVELS
ENERGY RANGE
FOILS
GAMMA RADIATION
GAMMA SPECTROMETERS
MEASURED VALUES
MEV RANGE
NUCLEAR REACTIONS
PHOSPHORUS 31
PHOTOMULTIPLIERS
PHYSICS
PROTON BEAMS
RESONANCE
SCINTILLATION COUNTERS
SILICON 30
SPECTRA
SPIN
TARGETS
THALLIUM
TRANSIENTS
VAN DE GRAAFF ACCELERATORS