Format

Send to

Choose Destination
Radiat Prot Dosimetry. 2014 Oct;161(1-4):383-6. doi: 10.1093/rpd/nct290. Epub 2013 Nov 20.

EPR/alanine pellets with low Gd content for neutron dosimetry.

Author information

1
Dipartimento di Fisica, Viale delle Scienze, Ed.18, I-90128 Palermo, Italy Gruppo V, INFN, Sezione di Catania, Catania, Italy maurizio.marrale@unipa.it.
2
Dipartimento di Fisica, Viale delle Scienze, Ed.18, I-90128 Palermo, Italy Gruppo V, INFN, Sezione di Catania, Catania, Italy.
3
Dipartimento di Fisica, Viale delle Scienze, Ed.18, I-90128 Palermo, Italy.
4
Dipartimento Energia, Ingegneria dell'Informazione e Modelli Matematici, Viale delle Scienze, Ed.6, I-90128 Palermo, Italy.
5
Università di Pavia e INFN, Sezione di Pavia, Pavia, Italy.

Abstract

This paper reports on results obtained by electron paramagnetic resonance (EPR) measurements and Monte Carlo (MC) simulation on a blend of alanine added with low content of gadolinium oxide (5 % by weight) to improve the sensitivity to thermal neutron without excessively affecting tissue equivalence. The sensitivity is enhanced by this doping procedure of more an order of magnitude. The results are compared with those obtained with the addition of boric acid (50 % by weight) where boron is in its natural isotopic composition in order to produce low-cost EPR dosemeters. The gadolinium addition influences neutron sensitivity more than the boron addition. The presence of additives does not substantially change the fading of the EPR signal induced by neutrons. The MC simulations agree the experimental results in case of gadolinium addition.

PMID:
24262924
DOI:
10.1093/rpd/nct290
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Silverchair Information Systems
Loading ...
Support Center