title: Measurement of neutron fluence spectra up to 150 MeV using a stacked scintillator neutron spectrometer.
abstract: A stacked scintillator neutron spectrometer (S3N) consisting of three slabs of liquid organic scintillator is described. A pulsed beam providing a broad spectrum of neutron energies is used to determine the detection efficiency of the spectrometer as a function of incident neutron energy and to measure the pulse height response matrix of the system. Neutron spectra can then be determined for beams with any kind of time structure by unfolding pulse height spectra measured by the S3N. Examples of fluence spectrum measurements in the energy range 20-150 MeV are presented.
authors.affiliation: Physics Department, University of Cape Town, Rondebosch, 7700, South Africa. fbrooks@science.ucl.ac.uk
authors.forename: F D
authors.initials: FD
authors.lastname: Brooks
authors.forename: M S
authors.initials: MS
authors.lastname: Allie
authors.forename: A
authors.initials: A
authors.lastname: Buffler
authors.forename: V
authors.initials: V
authors.lastname: Dangendorf
authors.forename: M S
authors.initials: MS
authors.lastname: Herbert
authors.forename: S A
authors.initials: SA
authors.lastname: Makupula
authors.forename: R
authors.initials: R
authors.lastname: Nolte
authors.forename: F D
authors.initials: FD
authors.lastname: Smit
mesh_terms: D002138:Calibration / Q000592:standards; D017408:Guidelines as Topic; D018499:Linear Energy Transfer; D009502:Neutrons; D011868:Radioisotopes / Q000032:analysis*; D012015:Reference Standards; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012588:Scintillation Counting / Q000295:instrumentation* / Q000379:methods* / Q000592:standards; D012680:Sensitivity and Specificity; D013019:South Africa; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods / Q000592:standards*
chemical_list: D011868:Radioisotopes