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EPAX Version 2.1
An Empirical Parametrization of Projectile-Fragmentation Cross Sections
by K. Sümmerer and B. Blank

Welcome to this interactive version of EPAX V2.1! This program will assist you in estimating production cross sections for projectile fragmentation reaction products, using a parametrization based on experimental data from high-energy reactions.

Please enter the following information:
NOTE: Setting Z(fragment) = 999 calculates all possible isotopes (no transfer), while A(fragment)=999 calculates all possible isotopes with Z(fragment)!

Projectile: Target: Fragment:
A: A: A:
Z: Z: Z:

If you want to learn more about the EPAX parametrization, such as the underlying physics and the inherent assumptions and limitations, check out these sources:

  1. K. Sümmerer et al., Phys. Rev. C42, 2546 (1990) [PDF 1457 KB]
  2. K. Sümmerer and B. Blank, Phys. Rev. C61, 034607 (2000) [PDF 191 KB]
  3. K. Sümmerer, "EPAX Version 2: A modified empirical parametrization of fragmentation cross sections"

Remember that in order to obtain production rates, the cross sections must be folded with beam intensity and target thickness. Furthermore, the total transmission must be taken into account to predict rates at the final focus of the fragment separator. The program MOCADI can be used for these purposes.


EPAX V2.1 © 1999 K. Sümmerer (GSI-Darmstadt), B. Blank (CEN-Bordeaux)
Active Server Page (ASP) encoding © 2000-2001 M. Hellström (Lund University)