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NGD Cold Neutron Prompt Gamma-ray Activation Analysis Spectrometer at NIST

Published

Author(s)

Rick L. Paul, Dagistan NMN Sahin, Jeremy C. Cook, Christoph W. Brocker, Richard M. Lindstrom, Donna J. O'Kelly

Abstract

A new instrument for cold neutron prompt gamma-ray activation analysis (CNPGAA) has been designed and constructed as part of the recent expansion of the cold neutron guide hall at the NIST Center for Neutron Research (NCNR). Located on neutron guide NGD, the new CNPGAA spectrometer has a 10-fold increase in neutron flux as well as lower gamma-ray and neutron background compared to the previous instrument at NG7. Monte Carlo based simulation sofware and experimental setups were used in the design phase to mitigate a low level of background while preserving high neutron fluence at the sample position. The new instrument also provides more space for samples and for experimental setup compared to the old facility. The expansion of experimental space yields the ability to analyze larger samples and to increase measurement capability by addition of scanning stages. Furthermore, additonal detectors for coincidence measurement, cryostats, and sample changers would be effortlessly adapted into the new instrument.
Citation
Journal of Radioanalytical and Nuclear Chemistry
Volume
304
Issue
1

Keywords

prompt gamma ray activation analysis, cold neutrons, analytical chemistry, chemical science, materials science, hydrogen, instrumentation
Created April 1, 2015, Updated March 29, 2017