牙釉质对14兆电子伏中子的剂量响应。

Dosimetric response of tooth enamel to 14 Mev neutrons.

作者信息

Fattibene P, Angelone M, De Coste V, Pillon M

机构信息

Istituto Superiore di Sanità, Viale Regina Elena 299, 00162 Rome, Italy.

出版信息

Radiat Environ Biophys. 2004 Jul;43(2):85-90. doi: 10.1007/s00411-004-0237-8. Epub 2004 Apr 30.

DOI:10.1007/s00411-004-0237-8

PMID:15118864

Abstract

The electron paramagnetic resonance (EPR) response of tooth enamel in a monenergetic neutron beam of 14 MeV was studied, with the aim to evaluate the relative neutron to (60)Co sensitivity. Three samples of tooth enamel powder were irradiated in air. A whole tooth and a powdered sample were irradiated in a geometrical PMMA phantom, in order to simulate the real exposure of a tooth inside a human head. The measured dose in enamel was compared to the dose calculated by Monte Carlo simulation. The relative neutron to (60)Co sensitivity using different reference materials (air, water and enamel) was evaluated as well. Large differences in sensitivity values were found depending on the reference material: the obtained relative neutron to (60)Co sensitivity was 0.47+/-0.09 for enamel and 0.15+/-0.03 for water. A comparison with results in fast neutron fields is reported.

摘要

研究了牙釉质在14 MeV单能中子束中的电子顺磁共振（EPR）响应，目的是评估中子与（60）Co的相对灵敏度。三个牙釉质粉末样品在空气中进行辐照。一颗完整牙齿和一个粉末样品在几何形状的聚甲基丙烯酸甲酯（PMMA）模体中进行辐照，以模拟人头部内牙齿的实际照射情况。将牙釉质中测量的剂量与蒙特卡罗模拟计算的剂量进行比较。还评估了使用不同参考材料（空气、水和牙釉质）时中子与（60）Co的相对灵敏度。发现灵敏度值因参考材料而异：牙釉质获得的中子与（60）Co相对灵敏度为0.47±0.09，水为0.15±0.03。报告了与快中子场结果的比较。