banner image for surface and microanalysis science division with links to chemical science and technology laboratory and and return to division home page Chemical Science and Technology Laboratory label with link to Surface and Microanalysis Science Division label with link to home.html NIST logo label with link to

DTSA-II icon

Developed by Nicholas W. M. Ritchie

A from-the-ground-up reinvention of the classic Desktop Spectrum Analyzer product. Available for many common desktop operating systems.

More about DTSA-II here

DTSA icon Desktop Spectrum Analyzer (DTSA)

Developed by Chuck Fiori, Carol Swyt-Thomas, and Bob Myklebust

An OS 8 & 9 MACINTOSH ONLY! based x-ray spectral analysis and manipulation software package.
The NIST/NIH Desktop Spectrum Analyzer generates, interprets and analyzes x-ray spectra from specimens under electron bombardment. This remarkable software/database package simulates the experimental environment and emulates specimen properties to generate spectra reflecting the relevant physics, chemistry and statistics of a real world application. DTSA incorporates many widely accepted x-ray data analysis procedures including those developed over many years at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD and the National Institutes of Health (NIH) in Bethesda, MD.

More about DTSA for Apple Macintosh OS 8&9 here


"This software was developed at the National Institute of Standards and Technology by employees
of the Federal Government in the course of their official duties. Pursuant to title 17 Section 105 of
the United States Code this software is not subject to copyright protection and is in the public
domain. Each of these packages is an experimental system. NIST assumes no responsibility whatsoever for its
use by other parties, and makes no guarantees, expressed or implied, about its quality, reliability,
or any other characteristic. We would appreciate acknowledgement if the software is used. This software
can be redistributed and/or modified freely provided that any derivative works bear some notice
that they are derived from it, and any modified versions bear some notice that they have been

Last Updated March 4, 2009
For information on
other federal
programs, see:
link to web site To search federal science and technology web sites, including online databases see: Link to Science Gov  

Web Contact

General Public Inquiries Unit: (301) 975-NIST (6478) TTY (301) 975-8295

Privacy Statement/Security Notice Disclaimer FOIA

NIST is an agency of the U.S. Commerce Department Technology Administration.