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Version History

Example of how to reference this online database: (Replace year, month day with database access date.)
Berger, M.J., Coursey, J.S., Zucker, M.A., and Chang, J. (2005), ESTAR, PSTAR, and ASTAR: Computer Programs for Calculating Stopping-Power and Range Tables for Electrons, Protons, and Helium Ions (version 1.2.3). [Online] Available: [year, month day]. National Institute of Standards and Technology, Gaithersburg, MD.
Optional addition:
Originally published as: Berger, M.J., NISTIR 4999, National Institute of Standards and Technology, Gaithersburg, MD (1993).
Citation Form:
Author/editor. (Year), Title (edition). [Type of medium] Available: URL [Access date].

Version 1.2.3
August 2005
Improvements were made to the graphing procedure.
Version 1.2.2
April 2000
Installation documentation information supplied.
Version 1.2.1
October 1999
Mislabeled column headings were fixed, and units were added to the spreadsheet (array) output pages.
Version 1.2
July 1999
On ESTAR, when additional energies are added, the standard grid is restricted to an energy range whose calculations result in less uncertainty. Also, on additional energies, data is rounded to 4 significant figures instead of 5 as was done previously. Note: the data is only accurate to 3 significant figures, though 4 may be useful for interpolation. On ESTAR, ASTAR, and PSTAR, energies are now displayed in exponential form. On ESTAR, the density effect parameter is also displayed in exponential form. New option allows downloading output in spreadsheet (array) form. Source code and executables for version 1.2 made available for downloading.
Version 1.1
June 1999
Databases made more accessible by implementing W3C Web Accessibility guidelines. This included incorporating different line styles into the graphs to make them usable for those without the ability to see different colors.
Version 1.0
October 1998
Web program online.
Earlier Work
January 1993
NISTIR 4999 published, M. J. Berger

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