HEAVY-PARTICLE STRIPPING IN THE Be$sup 9$(He$sup 3$,/cap alpha/)Be$sup 8$ REACTION AND ENERGY LEVELS OF Be$sup 8$

Journal Article · Thu Aug 01 04:00:00 EDT 1963 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.131.1212· OSTI ID:4686247

Dorenbusch, W E; Browne, C P

Angular distributions of alpha particles from the tate and the levels at 2.9, 16.6, 16.9, and 17.6 Mev were measured at bombarding energies of 3.00 and 4.00 Mev. Reaction alphas were momentum-analyzed with a broad-range spectrograph. Angular distributions for the ground state and the levels at 2.9 and 16.9 Mev are analyzed with a direct reaction theory which includes both the pickup and the heavy-particle stripping amplitudes. Yield measurements for the 17.6-Mev level were not made for angles larger than 100 deg. Over this limited range in angie the angular distributions for this level are in agreement with the predictions of Butler theory. The formation of the 16.6Mev level apparently proceeds via the compound nucleus. Absolute differential cross sections were found by comparison with the known cross section for the Be/sup 9/(d p)Be/sup 10/ reaction. Cross sections for the Be/sup 9/(He/sup 3/, alpha )Be/sup 8/ reaction vary from 0.5 mb/ sr to 7.6 mb/sr. The level structure of Be/sup 8/ was studied from the ground state up to 17.6-Mev excitation. Levels were found at excitation energies of 2.90 plus or minus Mev, with the indication of a very broad level in the region of 12.5 Mev. Widths of the 2.9-, 16.6-, and 16.9-Mev levels are 1350 plus or minus l50, 96 plus or minus 20, and 80 plus or minus 15 kev, respectively. (auth)

• Research Organization: Univ. of Notre Dame, Ind.
• NSA Number: NSA-17-031499
• OSTI ID: 4686247
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 131; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA PARTICLES
ANGULAR DISTRIBUTION
BERYLLIUM 10
BERYLLIUM 8
BERYLLIUM 9
BUTLER THEORY
COMPOUND NUCLEI
CROSS SECTIONS
DEUTERONS
DIRECT REACTIONS
ENERGY
ENERGY LEVELS
EXCITATION
HELIUM 3
LIFETIME
MEASURED VALUES
MOMENTUM
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PHYSICS
PROTONS
SPECTROMETERS
STRIPPING