Fusion evaporation and fusion-fission with aligned /sup 23/Na ions at energies near and below the fusion barrier

Journal Article · Thu Oct 01 00:00:00 EDT 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.36.1351· OSTI ID:6011453

Butsch, R; Jaensch, H; Kraemer, D; Moebius, K; Ott, W; Steffens, E; Tungate, G; Weller, a A; Becker, K; Blatt, K; others, and

Using aligned /sup 23/Na beams, fusion cross sections sigma/sup fus/ and second-rank tensor analyzing powers for fusion T/sub 20//sup fus/ have been measured at energies near and below the fusion barrier for /sup 23/Na+ /sup 48/Ti and for /sup 23/Na+ /sup 206/Pb. At sub-barrier energies, large, nearly maximal, values of T/sub 20//sup fus/ occur, especially for fusion with the heavy target /sup 206/Pb. This reflects the strong influence of the spectroscopic deformation of the projectile on the fusion process at energies below the barrier. However, within a quantum-mechanical coupled-channels calculation this degree of freedom is not enough to describe both the fusion cross section and the second-rank tensor analyzing power for fusion in the energy regime below the fusion barrier. It is shown that the coupling of the fusion channel to inelastic excitations of the projectile and the target can describe the magnitude and energy dependence of T/sub 20//sup fus/ for both heavy ion systems, but fails to reproduce the ''sub-barrier enhancement'' of the fusion cross section for both systems.

• Research Organization: Max-Planck-Institut fuer Kernphysik, D-6900 Heidelberg, Federal Republic of Germany
• OSTI ID: 6011453
• Journal Information: Phys. Rev. C; (United States), Vol. 36:4
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
LEAD 206 TARGET
SODIUM 23 REACTIONS
FISSION
HEAVY ION FUSION REACTIONS
TITANIUM 48 TARGET
ANALYZING POWER
COULOMB FIELD
COUPLED CHANNEL THEORY
CROSS SECTIONS
ENERGY DEPENDENCE
INELASTIC SCATTERING
PARITY
Q-VALUE
QUANTUM MECHANICS
SPIN
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
ELECTRIC FIELDS
ENERGY
HEAVY ION REACTIONS
MECHANICS
NUCLEAR REACTIONS
PARTICLE PROPERTIES
SCATTERING
TARGETS
651920* - Nuclear Properties & Reactions
A=190-219
Experimental