ABSOLUTE CROSS SECTIONS AND ANGULAR DISTRIBUTIONS FOR CHARGED PARTICLES FROM LITHIUM-LITHIUM NUCLEAR REACTIONS

Journal Article · Tue Jan 15 04:00:00 EST 1963 · Physical Review (U.S.) Superseded in part by Phys.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.129.791· OSTI ID:4731234

Huberman, M N; Kamegai, M; Morrison, G C

Angular distributions in the barycentric coordinate system are presented for 24 charged-particle emissions from Li/sup 7/Li/sup 7/, Li/sup 7/,Li/sup 6/, and Li/sup 6/Li/sup 6/ interactions. Th ese have been integrated, and the resulting total cross sections are tabulated. The total cross-section sums for a given projectile target combination are in reasonable agreement with theoretical estimates based on barrier penetration with nuclear radii given by r/sup 0/A/sup 1/2/ with r/sub 0/ = 1.5 F. The largest total cross sections measured are approximately 40 x 10/sup -28/ cm/sup 2/. The angular distributions from Li/sup 6/Li/sup 6/ and Li/sup 7/Li/sup 7/ are symmetr ical about 90 deg by necessity, those from Li/sup 7/Li/sup 6/ are, in general, asymmetric and difficult to reconcile with a simple compound-nucleus interpretation of the reactions. Most of the intense particle emissions are cases in which the residual nucleus can be formed by Li/sup 7/ capturing a deuteron or an alpha from Li/sup 6/, or by Li/sup 6/ capturing an alpha from Li/sup 7/ To produce high cross sections these captures must be with 1 = 0 between the reacting clusters. The evidence supports the hypothesis that a prominent but not necessarily exclusive reaction mechanism is for one of the Li-Li reacting partners to be distorted into reacting clusters,'' consisting of an alpha cluster from either of the lithiums, and a deuteron cluster from Li/sup 6/ or a triton cluster from Li/sup 7/. (auth)

• Research Organization: Univ. of Chicago
• NSA Number: NSA-17-007251
• OSTI ID: 4731234
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 129; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA PARTICLES
ANGULAR DISTRIBUTION
CAPTURE
CHARGED PARTICLES
COMPOUND NUCLEI
CROSS SECTIONS
DEUTERONS
EXCITATION
LIFETIME
LITHIUM 6
LITHIUM 7
NUCLEAR REACTIONS
NUCLEI
PHYSICS