TY - JOUR
T1 - Thermal neutron detection at outer electrode surfaces of composite polycrystalline B, BN, B4C and LiF through air ionization
AU - Schieber, M.
AU - Mojaev, E.
AU - Roth, M.
AU - Zuck, A.
AU - Khakhan, O.
AU - Fleider, A.
PY - 2009/8/21
Y1 - 2009/8/21
N2 - Single phase polycrystalline hexagonal boron nitride (BN) or mixed with boron carbide (BxC) and/or polycrystalline cubic lithium fluoride (LiF) can be embedded in an insulating polymeric matrix. This matrix acts as a binder forming a composite material. Such materials were tested as surface neutron converters of gaseous detectors. Signals were induced by ionized air near electrodes. The detectors show a rather good spectral response for ionized air produced by alpha particles emitted from a 241Am (5.5 MeV) isotope source (∼105 cm-2 s-1) as well as low gamma sensitivity. For detection of thermal neutrons from a low flux source (∼200 cm-2 s-1), neutron counting is possible by subtracting the integrated noise from the integrated total signal counted above some threshold; here again the signals are produced by the ionized air and cannot be detected in vacuum. Crown
AB - Single phase polycrystalline hexagonal boron nitride (BN) or mixed with boron carbide (BxC) and/or polycrystalline cubic lithium fluoride (LiF) can be embedded in an insulating polymeric matrix. This matrix acts as a binder forming a composite material. Such materials were tested as surface neutron converters of gaseous detectors. Signals were induced by ionized air near electrodes. The detectors show a rather good spectral response for ionized air produced by alpha particles emitted from a 241Am (5.5 MeV) isotope source (∼105 cm-2 s-1) as well as low gamma sensitivity. For detection of thermal neutrons from a low flux source (∼200 cm-2 s-1), neutron counting is possible by subtracting the integrated noise from the integrated total signal counted above some threshold; here again the signals are produced by the ionized air and cannot be detected in vacuum. Crown
KW - Boron nitride
KW - Lithium fluoride
KW - Neutron absorption
KW - Radiation solid state detectors
UR - http://www.scopus.com/inward/record.url?scp=67651176323&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2009.06.004
DO - 10.1016/j.nima.2009.06.004
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AN - SCOPUS:67651176323
SN - 0168-9002
VL - 607
SP - 634
EP - 639
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 3
ER -