Model for fusion and cool compound nucleus formation based on the fragmentation theory

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.33.156· OSTI ID:6073548

Malhotra, N; Aroumougame, R; Saroha, D R; Gupta, R K

Collective potential energy surfaces are calculated in both the adiabatic and sudden approximations by using the asymmetric two-center shell model in the Strutinsky method. It is shown that fusion of two colliding heavy ions occurs by their crossing over of the adiabatic interaction barrier. The adiabatic scattering potentials present two barriers, whereas no barrier is shown to occur in sudden scattering potentials. The first barrier is obtained just past the saddle shape but is too low, such that a deep inelastic process is expected. The other, inner, barrier is high enough to let the system fall into the fusion well, whose excitation energy then determines whether a cool compound nucleus is produced or the fusion-fission process occurs. For a given compound nucleus, the excitation energy is found to be small for only a few target-projectile combinations, which increase as their mass asymmetry increases. Such target-projectile combinations which refer to a cool compound nucleus can be identified by a simple calculation of the fragmentation potential based on the ground state binding energies with Coulomb and proximity effects calculated at a constant relative separation of the two nuclei. Our calculations are made for the composite systems with 102 < or =Z < or =114.

• Research Organization: Physics Department, Panjab University, Chandigarh-160014, India
• OSTI ID: 6073548
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions &amp; Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
COMPOUND-NUCLEUS REACTIONS
COULOMB FIELD
CROSS SECTIONS
DEEP INELASTIC SCATTERING
DEFORMATION
ELECTRIC FIELDS
ENERGY
ENERGY LEVELS
EXCITATION FUNCTIONS
FRAGMENTATION
FUNCTIONS
GROUND STATES
HEAVY ION FUSION REACTIONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MASS SPECTRA
MATHEMATICAL MODELS
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
POTENTIAL ENERGY
POTENTIALS
SCATTERING
SHELL MODELS
SPECTRA