The calibration of a 3He spectrometer and its use to measure the neutron spectrum from an Am/Li source

Development of a Reference Database for Beta-Delayed Neutron Emission

“…Apart from electronic and microphonic noise, the response includes the effect of γ-ray interactions (includ-ing pulse pile-up), a peak due to thermal neutron background, the effect of neutron-induced recoils in the gas, the detector-wall effect, and ballistic effects (incomplete charge integration, see [69] for a detailed discussion). Information on signal risetime can be used to eliminate some of these artifacts [70], at the cost of lowering the efficiency.…”

Fast-neutron spectrometry using a 3He ionization chamber and digital pulse shape analysis

“…[14][15][16][17][18][19][20] They have also been used to quantify the neutron spectra from 16 radioisotope neutron sources and to evaluate neutron radiation fields for health physics applications. [7,[21][22][23] The 17 best method to evaluate the performance of a neutron spectrometer is to use a charged-particle accelerator to 18 produce calibrated monoenergetic neutron fields of known energy and known intensity across a wide range of 19 energies; an alternate approach is to use the 252 Cf transmission technique to make relative analyses of the 20 performance of a C-S neutron spectrometer. […”

7 Neutron Detectors

“…The spectrometer has been used for the measurement of delayed neutrons [94,95], isotopic sources [96], neutron transmission in materials [97], power reactor neutrons [98], and neutrons from fusion reactors [90]. The range of the spectrometer, 0.5 to 5 MeV is well suited for these purposes.…”