ENERGY DISTRIBUTION OF Be$sup 8$ IN C$sup 12$ THREE $alpha$ PARTICLE DECAY UNDER THE ACTION OF PROTONS AND NEUTRONS

Journal Article · Thu Sep 01 04:00:00 EDT 1960 · Izvest. Akad. Nauk S.S.S.R., Ser. Fiz.

OSTI ID:4074506

Vasil'ev, S S; Komarov, V V; Popova, A M

The mechanism of C/sup 12/ yields 3 alpha decay under the action of 8.5- and 19-Mev neutrons and 15- to 30-Mev protons was studied. The probability of the intermediate Be/sup 8/ nucleus in the C/sup 12/ yields B/sup 8/ + alpha yields 3 alpha cascade and resonance interaction of two alpha particles in the finite state is analyzed, as well as the existence of the wide Be/sup 8/ level with center at 11.7 Mev and levels distributed between 3 and 11 Mev. The reactions C/sup 12/(n,n3 alpha ) in three-prong and C/sup 12/(p,p'3 alpha ) in five-prong stars in photoemulsion, irradiated by variable energy neutrons and protons, were observed. The energy distributions of alpha particles in the center-of-mass system of C/sup 13/ in C/sup 12/(n,n'3 alpha ) reaction were plotted for one group of incident neutron energies and for four groups of alpha particles in the center-of-mass of N/sup 13/ in C/sup 12/(p,p', 3 alpha ) reaction. In spite of the variations of incident nucleon energy from 14 to 30 Mev, the maximum of the alpha -particle energy distributions remains at approximately 3 Mev. Energy distributions for the B/sup 8/ in C/sup 12/(n,n', 3 alpha ) at E/sub n/ = 14 to 19 Mev and C/sup 12/(p,p', 3 alpha ) at B/sub p/ = 15 to 30 Mev are calculated with assumption of simultaneous decay. The obtained data indicate the probability of C/sup 12/ decay into three alpha particles with a strong resonance interaction of finite state particles. (R.V.J.)

• Research Organization: Inst. of Research in Nuclear Physics, Moscw State Univ., U.S.S.R.
• NSA Number: NSA-15-012122
• OSTI ID: 4074506
• Journal Information: Izvest. Akad. Nauk S.S.S.R., Ser. Fiz., Journal Name: Izvest. Akad. Nauk S.S.S.R., Ser. Fiz. Vol. Vol: 24
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALPHA DECAY
ALPHA PARTICLES
BERYLLIUM 8
CARBON 12
CARBON 13
COMPOUND NUCLEI
DECAY
DIAGRAMS
ENERGY
ENERGY LEVELS
ENERGY RANGE
FAST NEUTRONS
INTERACTIONS
MATHEMATICS
MEASURED VALUES
NEUTRON BEAMS
NEUTRONS
NITROGEN 13
NUCLEAR EMULSIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEI
NUMERICALS
PARTICLE TRACKS
PHYSICS
PROTON BEAMS
PROTONS
RESONANCE
SPECTRA
TARGETS