PIN silicon diode fast neutron detector

Abstract

Two batches of diodes, with different structural ratios (the ratio of area and thickness), were made using different manufacturing processes. The energy response of the first batch to 15 kinds of monoenergetic neutrons ranging from 180 keV to 17.56 MeV was tested, and the neutron source response of both batches to 239Pu-Be neutron source was measured. The energy deposition in the diodes irradiated by 1 keV to 20 MeV monoenergetic neutrons was calculated with simulation procedure. The response curve of the experimental results showed an approximately similar trend to that of theoretical computation. Based on the results of the neutron source response experiments, it was concluded that the response of fast neutron varied linearly with the structural ratio of the detectors.

The physics of solid-state neutron detector materials and geometries

“…the 25 Mg from the 28 Si(n, α) 25 Mg), in addition to the energy determination of the alpha particle or proton, could be used to back out the incident neutron energy; on this basis, a spectrometer with low total efficiency but relatively high resolution (of the order of tens of keV) could be fabricated (see section 3.2 for more on energy analysis using this technique). Building on the high-energy threshold (>5 MeV for 28 Si, >3 MeV for 29 Si and >8 MeV for 30 Si) and resonant cross-section structure, applications for determining fusion plasma ion temperatures [340] or 14 MeV neutron flux from tokamak triton burnup [341,342], to fastneutron dosimetry [247,343], to total fluence determination for colliders [310] were studied. Although there has been recent work utilizing the alpha particle and proton products from silicon neutron capture, such studies are tangential to the intended application (e.g.…”

Fast neutron measurements with solid state detectors at pulsed spallation sources

“…Solid state detectors, in particular diamond and silicon detectors, are useful for the measurement of fast neutrons at spallation sources [1][2]. They can be useful both for counting, i.e.…”