Fission barriers for Po nuclei produced in complete fusion reactions with heavy ions

TY - JOUR

T1 - Fission barriers for Po nuclei produced in complete fusion reactions with heavy ions

AU - Sagaidak, R. N.

AU - Andreyev, A. N.

PY - 2009/5/1

Y1 - 2009/5/1

N2 - Evaporation residues and fission excitation functions obtained in complete fusion reactions leading to Po compound nuclei have been analyzed in the framework of the standard statistical model. Macroscopic fission barriers deduced from the cross-section data analysis are compared with the predictions of various theoretical models and available data. A drop in the Po barriers with the decrease in a neutron number was found, which is stronger than predicted by any theory. The presence of entrance channel effects and collective excitations in the compound nucleus decay is considered as a possible reason for the barrier reduction.

AB - Evaporation residues and fission excitation functions obtained in complete fusion reactions leading to Po compound nuclei have been analyzed in the framework of the standard statistical model. Macroscopic fission barriers deduced from the cross-section data analysis are compared with the predictions of various theoretical models and available data. A drop in the Po barriers with the decrease in a neutron number was found, which is stronger than predicted by any theory. The presence of entrance channel effects and collective excitations in the compound nucleus decay is considered as a possible reason for the barrier reduction.

KW - SYSTEMS

KW - GROUND-STATE MASSES

KW - CONFIGURATIONS

KW - LEVEL DENSITY

KW - QUASIFISSION

KW - MODEL

KW - N=126 SHELL

KW - CROSS-SECTIONS

KW - QUASI-FISSION

KW - SADDLE-POINT

UR - http://www.scopus.com/inward/record.url?scp=66749162190&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.79.054613

DO - 10.1103/PhysRevC.79.054613

M3 - Article

VL - 79

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 5

M1 - ARTN 054613

ER -