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PIXE Data Library

Reference:
M. G. Pia, G. Weidenspointner, M. Augelli, L. Quintieri, P. Saracco, M. Sudhakar, A. Zoglauer,
PIXE simulation with Geant4
 IEEE Trans. Nucl. Sci., vol. 56, no. 6, pp. 3614-3649, Dec. 2009
Bibliographical references to the original sources of models and experimental mentioned in this web page can be found in the above cited publication.

Contents:
Cross Sections Data format Bibliography
Data Library: Documentation Data Data retrieval program
This data library was developed for PIXE simulation with Geant4; however, it can be used also with other software and experimental environments.

Ionisation cross sections

The data library contains cross section tabulations for K, L and M shell ionisation based on various theoretical and empirical models. The models from which the data derive are described in detail in:
M. G. Pia, G. Weidenspointner, M. Augelli, L. Quintieri, P. Saracco, M. Sudhakar, A. Zoglauer, PIXE simulation with Geant4, IEEE Trans. Nucl. Sci., vol. 56, no. 6, pp. 3614-3649, Dec. 2009.
The most relevant related references specific to each model are cited below.

Theoretical cross section models

Theoretical cross section models include:

The tabulations corresponding to theoretical calculations span the energy range between 10 keV and 10 GeV.

ECPSSR and PWBA tabulations have been produced using the ISICS [6] software, 2006 version [7] and an extended version [8] including high energy developments.

Empirical cross section models

Theoretical cross section models include:

The empirical models are tabulated consistently with their energy range of validity.

The tabulations of K shell cross sections by Paul and Sacher, Paul and Bolik are based on the data reported in the respective references. The tabulations of the other cross sections were produced by means of software developed ad hoc by M. G. Pia et al.

Validation of the cross sections

Details about the accuracy of the cross section are reported in the reference paper; specifically, section V (pp. 3627-3639) is devoted to the verification and validation of the cross section models tabulated in the data library.

Data format

The data are divided in two main folders:

  1. proton folder
  2. alpha folder

Each of these folders contains three folders:

  1. k folder: it contains a folder for each implemented model for K-shell ionization
  2. l folder: it contains a folder for each implemented model for L-shell ionization
  3. m folder: it contains a folder for each implemented model for M-shell ionization

Each cross section data set is stored as a separate file. The ASCII file for each element consists of two columns, listing energy values (in MeV) and corresponding cross section values (in mb).

The data library is provided in ASCII format. The entire library requires approximately 22 MB of storage.

References

  1. M. G. Pia, G. Weidenspointner, M. Augelli, L. Quintieri, P. Saracco, M. Sudhakar, A. Zoglauer, PIXE simulation with Geant4, IEEE Trans. Nucl. Sci., vol. 56, no. 6, pp. 3614-3649, Dec. 2009.
  2. W. Brandt and G. Lapicki, “Energy-loss effect in inner-shell Coulomb ionization by heavy charged particles”, Phys. Rev. A, vol. 23, 1717, 1981.
  3. G. Lapicki, “The status of theoretical K-shell ionization cross sections by protons”, X-Ray Spectrom., vol. 34, pp. 269-278, 2005.
  4. S. J. Cipolla, “The united atom approximation option in the ISICS program to calculate K, L, and M-shell cross sections from PWBA and ECPSSR theory”, Nucl. Instrum. Meth. B, vol. 261, pp. 142-144, 2007.
  5. G. Lapicki, “Scaling of analytical cross sections for K-shell ionization by nonrelativistic protons to cross sections by protons at relativistic velocities”, J. Phys. B, vol. 41, pp. 115201, 2008.
  6. Z. Liu and S. J. Cipolla, “ISICS: A program for calculating K-, L-, and M-shell cross sections from ECPSSR theory using a personal computer,” Comput. Phys. Comm., vol. 97, pp. 315–330, 1996.
  7. S. J. Cipolla, “An improved version of ISICS: a program for calculating K, L, and M-shell cross sections from PWBA and ECPSSR theory using a personal computer”, Comp. Phys. Comm., vol. 176, pp. 157-159, 2007.
  8. S. Cipolla, ISICS, 2008 version. Private communication Creighton Univ., Omaha NE 68178.
  9. H. Paul and J. Sacher, “Fitted empirical reference cross sections for K-shell ionization by protons”, Atom. Data Nucl. Data Tables, vol. 42, pp. 105-156, 1989.
  10. A. Kahoul, M. Nekkab, and B. Deghfel, “Empirical K-shell ionization cross-sections of elements from 4Be to 92U by proton impact”, Nucl. Instrum. Meth. B, vol. 266, pp. 4969-4975, 2008.
  11. H. Paul and O. Bolik, “Fitted Empirical Reference Cross Sections for K-Shell Ionization by Alpha Particles”, Atom. Data Nucl. Data Tables, vol. 54, pp. 75-131, 1993.
  12. Y. Miyagawa et al., “Analytical Formulas for Ionization Cross Sections and Coster-Kronig Corrected Fluorescence Yields of the Ll, L2, and L3 Subshells”, Nucl. Instrum. Meth. B, vol. 30, pp. 115-122, 1988.
  13. I. Orlic et al., “Semiempirical Formulas for Calculation of L Subshell Ionization Cross Sections”, Int. J. PIXE, vol. 4, no. 4, pp. 217-230, 1994.
  14. C. H. Sow et al., “New parameters for the calculation of L subshell ionization cross sections”, Nucl. Instrum. Meth. B, vol. 75, pp. 58-62, 1993.

Last modified 14 Dec 2010, Maria Grazia Pia