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NIST Calibration of a Neutron Spectrometer ROSPEC



Craig Heimbach


A neutron spectrometer, ROSPEC, was acquired for use in the measurement of NIST calibration neutron fields. The spectrometer included options for the measurement of low and high energy neutrons, for a measurement range from thermal neutron up to 16 MeV. The fields used included bare and moderated Cf-252, monoenergetic neutron fields of 2.5 and 14 MeV, and a thermal-neutron beam. Using calibration values determined in this exercise, the spectrometer gives a good approximation of the neutron spectrum, and excellent values for neutron fluence, for all NIST calibration fields. The spectrometer was used to measure an AmBe neutron field in a NIST exposure facility and determined the field quite well. The spectrometer can measure scattering effects in neutron spectra which previously could be determined only by calculation or integral measurements.
Journal of Research (NIST JRES) -
111 No. 6


calibration, neutron, NIST, ROSPEC, spectroscopy


Heimbach, C. (2006), NIST Calibration of a Neutron Spectrometer ROSPEC, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed May 19, 2024)


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Created December 1, 2006, Updated February 17, 2017