Formation and decay of [sup 164]Yb[sup ] in near- and below-barrier fusion reactions

• Published in: Physical review. C, Nuclear physics Vol. 48:6
• Main Authors: Nicolis, N.G., Sarantites, D.G.
• Format: Journal Article
• Language: English
• Published: United States 01-12-1993
• Subjects: 663210 - Ground-State Radioactivity- (1992-); 663450 - Heavy-Ion-Induced Reactions & Scattering- (1992-); 663570 - Nuclear Mass Ranges- A=150-189- (1992-); ANGULAR MOMENTUM; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CHARGED-PARTICLE REACTIONS; COMPOUND-NUCLEUS REACTIONS; COUPLED CHANNEL THEORY; CROSS SECTIONS; DECAY; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EXCITATION FUNCTIONS; FUNCTIONS; HEAVY ION FUSION REACTIONS; HEAVY ION REACTIONS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOTOPES; MATHEMATICAL MODELS; MOLYBDENUM 100 TARGET; NICKEL 64 REACTIONS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; NUCLEI; OXYGEN 16 REACTIONS; RADIOISOTOPES; RARE EARTH NUCLEI; SAMARIUM 148 TARGET; STATISTICAL MODELS; TARGETS; YTTERBIUM 164; YTTERBIUM ISOTOPES
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.48.2895

A consistent description of the formation and decay of [sup 164]Yb[sup *] in the fusion of [sup 16]O+[sup 148]Sm and [sup 64]Ni+[sup 100]Mo is presented in a bombarding energy range from near to well below the entrance channel Coulomb barrier. Fusion excitation functions and angular momentum distributions are described well with a recently proposed one-dimensional barrier penetration model with energy-dependent fusion barriers. The main features of fusion and angular momentum distribution data in [sup 64]Ni+[sup 100]Mo are also reproduced with simplified coupled channel calculations. The statistical model accounts well for the decay of [sup 164]Yb[sup *] in the [sup 16]O-induced reaction and for most of the data in the [sup 64]Ni-induced reaction. The evaporation residue fractional cross sections as a function of the compound nucleus excitation energy show trends that correlate with the low- and high-spin regions of the compound nucleus angular momentum distributions populated in the two reactions.