SCATTERING OF 18-MEV ALPHA PARTICLES BY C$sup 12$, O$sup 16$, AND S$sup 3$$sup 2$

Technical Report · Wed Jan 01 04:00:00 EST 1958

OSTI ID:4210512

Corelli, J C; Bleuler, E; Tendam, D J

The scattering of 18-Mev alpha particles by gaseous C/sub 3/II/sub 8, O/ sub 2/, and H/sub 2/S targets was studied with a multiplate ring chamber. The elastic angular distributions exhibit the diffraction-like pattern typical of light elements. Carbon and oxygen show a sharp rise above the Rutherford cross sections at the backward angles, with values sigma / sigma /sub R/ of 660 for carbon and 350 for oxygen near 173 . A good fit to the angular distribution for inelastic scattering leading to the first excited state of C/sup 12/ (4.43 Mev, 2/sup +/) is obtained using a STAj/sub 2/(qR)!/sup 2/ dependence with R = 5.5 x 10/sup -13/ cm. No direct-interaction analysis is possible for the alpha- particle groups corresponding to the 7.65-Mev and 9.61-Mev levels in C/sup 12/ and to the excited states of O/sup 16/ up to the 8.87-Mev level. All these distributions show strong forward peaking. In the case of inelastic scattering by S/sup 32/(Q = --2.24 Mev), an interaction radius of 6.5 x 10/sup -13/ cm can be deduced from the angular distribution, though the agreement with STAj/sub 2/ (qR)!/sup 2/ is rather poor. A summary of elastlc scattering results for elements in the range from Z = 6 to Z = 47 is presented. Expressions for the secondorder geometry and the multiple-scattering corrections are given. (auth)

• Research Organization: Purdue Univ., Lafayette, Ind.
• NSA Number: NSA-13-019599
• OSTI ID: 4210512
• Report Number(s): AECU-4253
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA BEAMS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CARBON 12
CROSS SECTIONS
DIRECT REACTIONS
ENERGY LEVELS
ENERGY RANGE
ERRORS
EXCITATION
GASES
HYDROGEN SULFIDES
MEASURED VALUES
MEV RANGE
NUCLEAR MODELS
NUCLEAR REACTIONS
OXYGEN
OXYGEN 16
PHYSICS AND MATHEMATICS
PROPANE
SCATTERING
SPECTRA
SULFUR 32
TARGETS