Complete fusion of {sup 9}Be with spherical targets

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.034606· OSTI ID:21386690

Esbensen, Henning ^[1]

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1. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

The complete fusion of {sup 9}Be with {sup 144}Sm and {sup 208}Pb targets is calculated in the coupled-channels approach. The calculations include couplings among the 3/2{sup -}, 5/2{sup -}, and 7/2{sup -} states in the K=3/2 ground-state rotational band of {sup 9}Be. It is shown that the B(E2) values for the excitation of these states are accurately described in the rotor model. The interaction of the strongly deformed {sup 9}Be nucleus with a spherical target is calculated using the double-folding technique and the effective M3Y interaction, which is supplemented with a repulsive term that is adjusted to optimize the fit to the data for the {sup 144}Sm target. The complete fusion is described by ingoing-wave boundary conditions. The decay of the unbound excited states in {sup 9}Be is considered explicitly in the calculations by using complex excitation energies. The model gives an excellent account of the complete fusion (CF) data for {sup 9}Be+{sup 144}Sm, and the cross sections for the decay of the excited states are in surprisingly good agreement with the incomplete fusion (ICF) data. Similar calculations for {sup 9}Be+{sup 208}Pb explain the total fusion data at high energies but fail to explain the CF data, which are suppressed by 20%, and the calculated cross section for the decay of excited states is a factor of 3 smaller than the ICF data at high energies. Possible reasons for these discrepancies are discussed.

• OSTI ID: 21386690
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevC.81.034606; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERYLLIUM 9
BOUNDARY CONDITIONS
COMPUTERIZED SIMULATION
COUPLED CHANNEL THEORY
COUPLING
CROSS SECTIONS
DECAY
E2-TRANSITIONS
EXCITATION
GROUND STATES
INTERACTIONS
LEAD 208 TARGET
ROTATIONAL STATES
SAMARIUM 144 TARGET
SPHERICAL CONFIGURATION
THERMONUCLEAR REACTIONS
ALKALINE EARTH ISOTOPES
BERYLLIUM ISOTOPES
CONFIGURATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITED STATES
ISOTOPES
LIGHT NUCLEI
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEOSYNTHESIS
SIMULATION
STABLE ISOTOPES
SYNTHESIS
TARGETS