NEA-1209: DWBA07/DWBB07, elastic scattering with nucleon-nucleon potential and DWBA for inelastic scattering

Program-name Package-ID Status DWBA82 NEA-1209/01 Obsolete DWBA91 NEA-1209/02 Obsolete DWBA91-INTERACTION NEA-1209/03 Obsolete DWBA91 NEA-1209/04 Obsolete DWBA98 NEA-1209/05 Obsolete DWBA98/DWBB98 NEA-1209/06 Obsolete DWBA05/DWBB05 NEA-1209/07 Obsolete DWBA07/DWBB07 NEA-1209/08 Tested

Machines used: Package-ID Orig.Computer Test Computer NEA-1209/08 Linux-based PC Linux-based PC,PC Windows

3. DESCRIPTION OF PROGRAM OR FUNCTION - Elastic and inelastic nuclear scattering described by a two-body interaction which can depend on the nuclear density. DWBB07 allows to compute any observable for any non zero-spin target, combining the results obtained by DWBA07 for different spin transfers.

NEA-1209/08:

NEW VERSION DIFFERS FROM PREVIOUS VERSION IN THE FOLLOWING FEATURES
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The present version corrects DWBA05/DWBB05 for which the exchange term of the two-body Coulomb interaction was absent.
In the previous version, when computing single particle-hole contributions,
to be used with DWBB, the first four phase-shifts of the last particle-hole calculation were wrong. In our test case, the difference for the total cross-section was less than 0.2%. The name of the program has also been changed to DWBA07/DWBB07 to indicate these corrections.

4. METHOD OF SOLUTION - The distorted wave Born approximation is used to describe the inelastic scattering on a zero-spin target to a state known by its particle-hole description. Besides the optical model, DWBA07 includes a fully microscopic non local optical model obtained with the description of the target by its occupation numbers and with the two-body interaction for the initial and final distorted waves. The effective interaction can be the one obtained by fitting some nucleon-nucleon potential or nucleon-nucleon elastic scattering. This effective interaction may comprise central, spin-orbit, tensor, L**2 and (LS)**2 operator components with Yukawa form factors and complex density dependent strengths.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM -
The M1 electromagnetic transition is out of the scope of DWBA07 because it is not included in the nucleon-nucleon interaction taken into account. On the contrary, the El transition is an effective part of the Coulomb interaction as considered in this code.

6. TYPICAL RUNNING TIME - The test problems included in the package require between 2 and 15 minutes CPU time.

7. UNUSUAL FEATURES OF THE PROGRAM - In order to keep the non-local potential (for the calculation of the incoming and outgoing wave) a large scratch data set can be used (default logical unit 8).

9. STATUS
NEA-1209/01: 02-MAR-1993 Obsolete
NEA-1209/02: 23-NOV-1999 Obsolete
NEA-1209/03: 23-NOV-1999 Obsolete
NEA-1209/04: 23-NOV-1999 Obsolete
NEA-1209/05: 01-MAR-2006 Obsolete
NEA-1209/06: 01-MAR-2006 Obsolete
NEA-1209/07: 04-OCT-2007 Obsolete
NEA-1209/08: 04-OCT-2007 Tested at NEADB

10. REFERENCES -
- RAYNAL J. Multipole expansion of a two-body interaction in helicity
formalism and its applications to nuclear structure and nuclear reaction
calculations Nucl. Phys. A 97, 572-592 (1967).
- RAYNAL J. Spin-orbit interaction in the inelastic nucleon scattering
'The Structure of Nuclei' pp. 75-116 (IAEA, Vienna, 1972)
International Course on Nuclear Theory, Trieste, Italie,
January 13 - March 12 1971
- K. Amos, P.J. Dortmans, H.V. von Geramb, S. Karatiglidis, J. Raynal
Nucleon-Nucleus Scattering: A Microscopic Nonrelativistic Approach
NEGELE J.W., VOGT E.W., eds. (Kluwer Academic/Plenum Publishers)
Adv. Nucl. Phys. 25, 275-540 (2000)
- J. Raynal:
Spin-orbit transition interactions Phys. Rev. C 71, 057602 (2005) DOI
NEA-1209/08:
- J. Raynal:
Notes on the DWBA98/DWBB98 (19 November, 1999)
- J. Raynal:
DWBA05
in: Proceedings of the P(ND)**2 Workshop (Perspectives on Nuclear Data for the
Next Decade), CEA/DIF, Bruyeres-le-Chatel, France, September 26-28 2005 (2005)

11. MACHINE REQUIREMENTS -

12. PROGRAMMING LANGUAGE(S) USED -
NEA-1209/08: FORTRAN

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - DOS and UNIX.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS -

15. NAME AND ESTABLISHMENT OF AUTHORS -
           Jacques Raynal
           4 rue du Bief
           91380 Chilly-Mazarin (France)

16. MATERIAL AVAILABLE -
NEA-1209/08:
DWBA07 Fortran source files
DWBA07 test problems
DWBA07 test problems input and output
PDF files on DWBA05 and NOTES ON DWBA98/DWBB98
DWBB07 Fortran source files
DWBB07 test problems
DWBB07 test problems input and output

17. CATEGORIES -

- A. Cross Section and Resonance Integral Calculations

Keywords: ANGULAR DISTRIBUTION, CROSS SECTIONS, DISTORTED WAVE BORN APPROXIMATION, DISTORTED WAVE THEORY, NUCLEAR MODELS