A Neutron Spectrometer with High Spatial Resolution for the Characterization of Mixed Fast Neutron Fields

Author

Fazzi, Alberto ; Varoli, Vincenzo ; Peduto, Francesco ; Pirovano, Claudio ; Rozzi, Donato ; Para, Armando Foglio ; Pola, Andrea ; Agosteo, Stefano

Author_Institution

Dept. of Nucl. Eng., Politecnico di Milano

Volume

1

fYear

2006

fDate

Oct. 29 2006-Nov. 1 2006

Firstpage

557

Lastpage

562

Abstract

A recoil-proton neutron spectrometer with high spatial and energy resolution intended for the characterization of mixed neutron fields around accelerators, in the range 0.3-8 MeV, is presented. The neutron converter is a 1 mm thick polyethylene foil and the recoil proton detector is a 500 mum thick monolithic silicon DeltaE/E telescope. In order to reject the low LET events, recoil protons are triggered by the signal of the 2 mum thick DeltaE stage and further off-line discriminated by means of the DeltaE/E scatter plot. The spectrometer has been irradiated with monoenergetic and continuous neutron fields at the CN Van De Graaff accelerator of INFN Legnaro Nat. Lab. (Padua). Results are in good agreement with TOF references in the range 0.35-3 MeV.

Keywords

energy loss of particles; neutron spectrometers; silicon radiation detectors; CN Van De Graaff accelerator; INFN Legnaro National Laboratory; Padua; continuous neutron fields; linear energy transfer event; mixed fast neutron field characterization; monoenergetic neutron fields; neutron converter; polyethylene foil; recoil proton detector; recoil proton neutron spectrometer; Detectors; Energy resolution; Neutrons; Polyethylene; Proton accelerators; Scattering; Silicon; Spatial resolution; Spectroscopy; Telescopes;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2006. IEEE

Conference_Location

San Diego, CA

ISSN

1095-7863

Print_ISBN

1-4244-0560-2

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2006.356219

Filename

4179058