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Manuscript Title: FORTRAN program to calculate finite-range no-recoil DWBA transfer
cross sections. | ||

Authors: G.L. Payne, P.L. von Behren | ||

Program title: FINITE RANGE DWBA PHASE 2 | ||

Catalogue identifier: ABOX_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 7(1974)13 | ||

Programming language: Fortran. | ||

Computer: IBM 360/65. | ||

Operating system: HASP OS/360. | ||

RAM: 24K words | ||

Word size: 32 | ||

Keywords: Nuclear physics, Finite range, Transfer reactions, Distorted-wave-born, Approximation, Stripping, Pick-up, Direct reaction. | ||

Classification: 17.11. | ||

Subprograms used: | ||

Cat
Id | Title | Reference |

ABOW_v1_0 | FINITE RANGE DWBA PHASE 1 | CPC 7(1974)13 |

Nature of problem:The program calculates angular distributions produced by direct nuclear transfer reactions. In this type of reaction one assumes that a nucleon or cluster of nucleons is transferred directly from a bound state in th e projectile nucleus to a bound state in the target nucleus. | ||

Solution method:The angular distributions are calculated by using the Distorted-Wave- Born-Approximation (DWBA) with the additional approximation of no- recoil. The method used here is that of Sawaguri and Tobocman. With this method one uses harmonic oscillator functions to expand the final bound- state wave function and to expand the initial bound-state wave function times its corresponding potential. These expansions are then used to generate a series expansion for the form factor or transfer function. This transition function is then used to calculate the distorted partial -wave matrix elements which are used to generate the angular distribution. Phase 1 calculates the form factor, or transfer function for each possible transferred L-value for given single-particle levels in both the initial and final bound states of the transferred particle. Other sets of single-particle levels may be included by running Phase 1 as many times as necessary. Phase 2 calculates the differential cross section by using the transfer function from Phase 1 to evaluate the matrix elements for each set of partial waves in the initial and final channels. Only the optical-model parameters are variable in Phase 2 since the contribution of the bound states to the matrix elements is fixed by Phase 1. | ||

Restrictions:The restrictions due to the "no-recoil" approximation are discussed in the theory section of the Long Write-up. The program is also restricted to interactions (in both bound-state and optical-model potentials) which have no spin dependence. |

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