SYMPOSIA PAPER Published: 14 December 2018
STP160820170053

Study of Epithermal-Neutron Spectrum Variation versus Depth in Water Phantoms

Source

A study has been carried out concerning the energy spectrum of the epithermal beam designed for boron neutron capture therapy of the LVR-15 research reactor. Monte Carlo (MC) calculations concerning radiation transport and dose distribution in water volumes of various shapes exposed to the epithermal neutron beam were developed with MC N-Particle/MC N-Particle Extended calculations. In addition to the energy spectra at various depths in a water phantom, longitudinal and transversal profiles of the fluence of neutrons above and below the cadmium cutoff (0.5 eV) have been evaluated for different shapes of the phantom. In particular, significant differences were found in the spatial distribution of neutrons for energy E < 0.5 eV. In order to confirm the reliability of simulations, a few depth profiles of neutron fluence below 0.5 eV, evaluated by means of MC calculations, have been compared with the profile of thermal neutrons obtained by means of experimental measurements. The consistency of results is good.

Author Information

Gambarini, Grazia
Università degli Studi di Milano, Department of Physics, Milano, IT INFN Istituto Nazionale di Fisica Nucleare, Section of Milan, Milano, IT
Bettega, Daniela
Università degli Studi di Milano, Department of Physics, Milano, IT INFN Istituto Nazionale di Fisica Nucleare, Section of Milan, Milano, IT
Gebbia, Andrea
Università degli Studi di Milano, Department of Physics, Milano, IT
Artuso, Emanuele
Università degli Studi di Milano, Department of Physics, Milano, IT
Felisi, Marco
Università degli Studi di Milano, Department of Physics, Milano, IT
Giove, Dario
Università degli Studi di Milano, Department of Physics, Milano, IT INFN Istituto Nazionale di Fisica Nucleare, Section of Milan, Milano, IT
Durisi, Elisabetta
Università degli Studi di Milano, Department of Physics, Milano, IT INFN Istituto Nazionale di Fisica Nucleare, Section of Milan, Milano, IT
Monti, Valeria
Università degli Studi di Milano, Department of Physics, Milano, IT INFN Istituto Nazionale di Fisica Nucleare, Section of Milan, Milano, IT
Klupák, Vit
Department of Neutron Physics, Research Centre Řež, CZ
Viererbl, Ladislav
Department of Neutron Physics, Research Centre Řež, CZ
Vins, Miroslav
Department of Neutron Physics, Research Centre Řež, CZ
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Developed by Committee: E10
Pages: 600–610
DOI: 10.1520/STP160820170053
ISBN-EB: 978-0-8031-7662-1
ISBN-13: 978-0-8031-7661-4