Abstract:
:A recoil-proton spectrometer was created by coupling a p-i-n diode with a polyethylene converter. The maximum detectable energy, imposed by the thickness of the totally depleted layer, is approximately 6 MeV. The minimum detectable energy is limited by the contribution of secondary electrons generated by photons in the detector assembly. This limit is approximately 1.5 MeV at full-depletion voltage and was decreased using pulse-shape discrimination. The diode was set up in the 'reverse-injection' configuration (i.e. with the N+ layer adjacent to the converter). This configuration provides longer collection times for the electron-hole pairs generated by the recoil-protons. The pulse-shape discrimination was based on the zero-crossing time of bipolar signals from a (CR)2-(RC)2 filter. The detector was characterised using monoenergetic neutrons generated in the Van De Graaff CN accelerator at the INFN-Laboratori Nazionali di Legnaro. The energy limit for discrimination proved to be approximately 900 keV.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Agosteo S,D'Angelo G,Fazzi A,Foglio Para A,Pola A,Ventura L,Zotto Pdoi
10.1093/rpd/nch237keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
509-16issue
1-4eissn
0144-8420issn
1742-3406pii
110/1-4/509journal_volume
110pub_type
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