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EXCITATION OF THE LOW LEVELS OF Li$sup 7$, Be$sup 8$, Be$sup 9$, AND Be$sup 10$ IN THE ALPHA-PARTICLE BOMBARDMENT OF LITHIUM (in Russian)

Journal Article · · Leituvos Fiz. Rinkinys
OSTI ID:4078431
; ;

The range spectra in the photographic plates of the particles from the reactions ( alpha , alpha /sup 1/), ( alpha ,t), ( alpha ,d), and ( alpha ,p) on lithium nuclei were investigated for the bombarding alphaparticle energy E/sub alpha = 13.2 and 14.7 Mev. Typical examples of spectra are shown. The reactions and the levels observed are listed. The angular distribution of the reaction Li/sup 7/ ( alpha , alpha /sup 1/)Li/sup 7/* (Q = -6.5 Mev) was investigated in the forward angle region for E/sub alpha / = 13.2 Mev and also the angular distributions of the reactions Li/sup 7/( alpha ,t/sup 1/)Be/sup 8*/ (Q =-5.46 Mev) and Li/sup 7/( alpha , p/sup 1/)Be/sup 10*/ (Q = -5.928 Mev) for E alpha = 14.7 Mev. Al l angular distributions show the strong anisotropy and have maxima at small forvard angles. There are indications of the direct interaction mechanism in these reactions. From an interpretation of the experimental angular distribution of the reaction ( alpha , alpha /sup 1/) within the frame work of Butler's theory it follows that the parity of the 6.5 Mev level in Li/sup 7/ nucleus is even and the spin is equal to one of the following three values: 1/2, 3/2, and 5/2. The experimental angular distribution of the reaction ( alpha ,t/sup 1/) can be described in the framework of the Butler type alpha- particle stripping theory with the two values of the parameter 1: 1 and 3. (auth)

Research Organization:
Inst. of Physics and Mathematics. Academy of Sciences, Lithuanian SSR
NSA Number:
NSA-18-015242
OSTI ID:
4078431
Journal Information:
Leituvos Fiz. Rinkinys, Journal Name: Leituvos Fiz. Rinkinys Vol. Vol: 2
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

ALPHA BEAMS
ANGULAR DISTRIBUTION
ANISOTROPY
BERYLLIUM 10
BERYLLIUM 8
BERYLLIUM 9
BUTLER THEORY
DEUTERONS
DIRECT REACTIONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
LITHIUM 7
MEV RANGE
NUCLEAR MODELS
NUCLEAR REACTIONS
PARITY
PHOTOGRAPHIC FILM
PHYSICS
PLATES
Q-VALUE
REACTION KINETICS
SPECTRA
SPIN
STRIPPING
TRITONS