Long Range Absorption and Other Direct Reaction Components in the Optical Potential

Conference · Sun Jan 01 04:00:00 EST 1978 · Proceedings of the Hamburg Topical Workshop on Nuclear Physics

DOI:https://doi.org/10.1007/BFb0115662· OSTI ID:6414844

Blatz, A. J.; Glendenning, N. K.; Kauffmann, S. K.; Pruess, K.

The effect of a strongly coupled inelastic excitation upon elastic scattering is represented as an optical potential component. In particular, a long range imaginary optical potential approximating the effects of quadrupole Coulomb excitation was derived in closed form. An analytical closed form for sub-Coulomb elastic scattering is obtained by inserting this potential into a weak-absorption model, and connection is made with the semi-classical theory of Coulomb excitation. Above the Coulomb barrier, the long range absorptive potential may be incorporated into an optical model code. Alternatively a more elaborate analytical formulation has been made of the cross section itself in the weak absorption model. The potential component arising from nuclear excitation of an inelastic state may be evaluated numerically on a computer. Two examples computed (50 MeV α scattering on ¹⁵⁴Sm and 60 MeV ¹⁶O scattering on ⁴⁰Ca) exhibit strong ℓ-dependence in the potential component. 18 references.

• Research Organization: Brookhaven National Lab., Upton, NY (USA); California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 6414844
• Report Number(s): BNL-24968; CONF-780971-1
• Conference Information: Journal Name: Proceedings of the Hamburg Topical Workshop on Nuclear Physics Journal Volume: 89
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
ALPHA REACTIONS
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
COULOMB FIELD
COUPLED CHANNEL THEORY
CROSS SECTIONS
ELASTIC SCATTERING
ELECTRIC FIELDS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
GROUND STATES
HEAVY ION REACTIONS
INELASTIC SCATTERING
MEV RANGE
MEV RANGE 10-100
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUMERICAL SOLUTION
OPTICAL MODELS
OXYGEN 16 REACTIONS
POTENTIALS
SAMARIUM 154 TARGET
SCATTERING
SEMICLASSICAL APPROXIMATION
TARGETS