Breakup fusion of /sup 7/Li

Journal Article · Tue Nov 01 00:00:00 EST 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.28.1975· OSTI ID:5472531

Utsunomiya, H; Kubono, S; Tanaka, M H; Sugitani, M; Morita, K; Nomura, T; Hamajima, Y

A breakup process of /sup 7/Li has been studied by performing the following measurements with a 77 MeV /sup 7/Li beam; (i) energy and angular distributions of z = 1 and 2 particles in the /sup 159/Tb+ /sup 7/Li reaction measured in singles and in coincidence with ..gamma.. rays from some heavy residual nuclei, (ii) out-of-plane angular distributions of ..gamma.. rays taken in coincidence with ..cap alpha.. particles in the /sup 159/Tb(/sup 7/Li, ..cap alpha..xn)/sup 162-x/Dy reaction to deduce the spin alignment involved, and (iii) in-plane and out-of-plane angular distributions of fission fragments measured in coincidence with z = 1 and 2 particles emitted in the reaction of /sup 232/Th(/sup 7/Li,xf) to extract the magnitude and alignment of the transferred angular momenta. The observed energy spectrum of tritons and ..cap alpha.. particles measured at forward angles exhibits a broad bump centered at a kinetic energy corresponding to the beam velocity, which is characteristic of the breakup mechanism. Roughly a half of the yield at this bump has been shown to originate from a breakup-fusion process, in which one of the breakup fragments is captured by a target nucleus. It is also shown that angular momenta transferred to residual nuclei by breakup fusion are well aligned along the normal to the reaction plane and have the magnitude, on the average, consistent with a direct reaction process occurring at the surface region of projectile and target nuclei.

• Research Organization: Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo, 188 Japan
• OSTI ID: 5472531
• Journal Information: Phys. Rev. C; (United States), Vol. 28:5
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
LITHIUM 6 REACTIONS
BREAKUP REACTIONS
FISSION
FUSION REACTIONS
TERBIUM 159 TARGET
THORIUM 232 TARGET
ALPHA PARTICLES
ANGULAR CORRELATION
COINCIDENCE SPECTROMETRY
DIFFERENTIAL CROSS SECTIONS
ENERGY SPECTRA
GAMMA RADIATION
MEV RANGE 10-100
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CORRELATIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
HEAVY ION REACTIONS
IONIZING RADIATIONS
MEV RANGE
NUCLEAR REACTIONS
RADIATIONS
SPECTRA
TARGETS
651825* - Nuclear Properties & Reactions
A=150-189
Experimental- Nuclear Reactions & Scattering- (-1987)
652026 - Nuclear Properties & Reactions
A=220 & above
Experimental- Spontaneous & Induced Fission- (-1987)