Vega-Carrillo H R, Manzanares-Acuña E, Hernández-Dávila V M, Chacón-Ruíz A, Gallego E, Lorente A
Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Apdo. Postal 336, 98000 Zacatecas, Zac. México.
Radiat Prot Dosimetry. 2007;126(1-4):265-8. doi: 10.1093/rpd/ncm055. Epub 2007 May 19.
A gamma ray spectrometer, with a 3('') Ø X 3('') NaI(Tl) detector, with a moderator sphere has been utilised to measure the neutron fluence rate, with this value the H(10) was estimated. When a neutron is captured by the hydrogen-based moderator, a 2.22 MeV prompt gamma ray is produced. In a multichannel analyser the net area under the 2.22 MeV photopeak is proportional to the total neutron fluence rate. The features of this system were determined by a Monte Carlo study that includes 3-, 5- and 10-inches diameter, water and polyethylene moderators and a (239)Pu-Be source. The prompt gamma response was extended to monoenergetic neutron sources. To verify the response, a (239)Pu-Be source in combination with a 10('') polyethylene sphere having a gamma-ray spectrometer with NaI(Tl) was utilised to estimate the neutron fluence rate and the H(10). These results were compared with neutron fluence rate and H(10) obtained using a Bonner sphere spectrometer and with the H(10) measured using a neutron remmeter.
一台配有3英寸直径×3英寸碘化钠（铊）探测器且带有慢化剂球的伽马射线能谱仪被用于测量中子注量率，并据此估算H(10)。当中子被氢基慢化剂俘获时，会产生能量为2.22兆电子伏的瞬发伽马射线。在多道分析器中，2.22兆电子伏光电峰下的净面积与总中子注量率成正比。该系统的特性通过蒙特卡罗研究确定，研究包括直径为3英寸、5英寸和10英寸的水和聚乙烯慢化剂以及一个钚 - 铍源。瞬发伽马响应扩展到了单能中子源。为验证响应，使用一个钚 - 铍源与一个带有碘化钠（铊）伽马射线能谱仪的10英寸聚乙烯球相结合来估算中子注量率和H(10)。这些结果与使用邦纳球谱仪获得的中子注量率和H(10)以及使用中子剂量仪测量的H(10)进行了比较。
