NIST Physical Measurements Laboratory LLNL V-Division LLNL

NIST Standard Reference Database 160 | Last Update to Data Content: August 2018 | DOI:

logo Total number of registered FLYCHK users: 1516
FLYCHK provides a capability to generate atomic level populations and charge state distributions for low-Z to mid-Z elements under NLTE conditions.
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Reference: FLYCHK: Generalized population kinetics and spectral model for rapid spectroscopic analysis for all elements, H.-K. Chung, M.H. Chen, W.L. Morgan, Yu. Ralchenko, and R.W. Lee, High Energy Density Physics v.1, p.3 (2005)
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new! Dec 4, 2019: A new plotting interface has been developed. We would greatly appreciate any comments.


This is a United States (NIST) computer system, which may be accessed and used only by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Access or use of this computer system by any person whether authorized or unauthorized, constitutes consent to these terms.
  FLYCHK at NIST is developed and managed by H.-K. Chung, M. Chen and R. W. Lee at LLNL and Yu. Ralchenko at NIST. This work was performed under the auspices of the U.S. Department of Energy by University of California Lawrence Livermore National Laboratory under Contract No. W-7406-Eng-48 (H.-K.C., M.C., and R.W.L.) and the Office of Fusion Energy Sciences of the U.S. Department of Energy (Yu.R.).


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  Online: August 2006 - Last update: August 2018