A solid state microdosimeter based on a monolithic silicon telescope.

Abstract:

:A monolithic silicon telescope, consisting of a DeltaE and an E stage-detector ( approximately 1.9 microm and 500 microm thick, respectively), was coupled to a polyethylene converter in order to investigate the feasibility of a solid state microdosimeter with respect to the field-funnelling effect. This work discusses the preliminary results of an analytical approach for the correction of a spectrum measured with this silicon-based microdosimeter for tissue-equivalence and geometrical effects. The device was irradiated with 2.7 MeV monoenergetic neutrons at the INFN-Laboratori Nazionali di Legnaro (Legnaro, Italy). The non tissue-equivalence of silicon was corrected by exploiting the signals generated in the E-stage. The correction for the sensitive volume geometry was optimised by taking into account the track length distribution of the recoil-protons generated in the converter. The derived dose distribution of the energy imparted per event was compared to the one measured with a cylindrical tissue-equivalent proportional counter (TEPC). The agreement is satisfactory.

journal_name

Radiat Prot Dosimetry

authors

Agosteo S,Colautti P,Fazzi A,Moro D,Pola A

doi

10.1093/rpd/ncl468

subject

Has Abstract

pub_date

2006-01-01 00:00:00

pages

382-6

issue

1-4

eissn

0144-8420

issn

1742-3406

pii

ncl468

journal_volume

122

pub_type

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