Eur. Phys. J. A 14, 377-392 (2002)
DOI: 10.1140/epja/i2002-10008-x

Approximation of photonuclear interaction cross-sections

M.V. Kossov

ITEP, Moscow, Russia and CERN, 1211 Geneva, Switzerland

Mikhail.Kossov@cern.ch

(Received: 22 February 2002 / Revised version: 17 April 2002 Communicated by M. Garçon)

Abstract
Photonuclear interaction cross-sections from the GEANT4 database are approximated for all nuclei and all energies (from the hadron production threshold to about 40 TeV). The approximation methods in the giant-dipole resonance region, nucleon resonance region, and high-energy region are improved with respect to existing approximations. As an application of the approximation for photonuclear cross-sections, an improved method of calculating electronuclear cross-sections is developed. The interaction cross-section of virtual photons with nuclei at high Q² are approximated and a simple algorithm for describing the electronuclear reactions, including high- Q² scattering, is proposed.

PACS
25.20.-x - Photonuclear reactions.
25.30.Rw - Electroproduction reactions.
24.30.-v - Resonance reactions.
21.60.Ka - Monte Carlo models.

© Società Italiana di Fisica, Springer-Verlag 2002