Laitano R F, Lamperti P J, Toni M P
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Dipartimento Ambiente, Centro Ricerche Casaccia, ENEA, c.p. 2400, Roma, Italy.
National Institute of Standards and Technology, Gaithersburg, MD 20899-0001 USA.
J Res Natl Inst Stand Technol. 1998 Jul-Aug;103(4):365-378. doi: 10.6028/jres.103.022. Epub 1998 Aug 1.
A comparison was made between the National Institute of Standards and Technology (NIST) and Ente per le Nuove Tecnologie l'Energia e l'Ambiente (ENEA) air kerma standards for medium energy x rays and Co gamma rays. The comparison took place at ENEA in June 1994. Two different transfer chambers from NIST were used for the comparison. The measurements were made at radiation qualities similar to those used at the Bureau International des Poids et Mesures (BIPM) (generating voltages of 100 kV, 135 kV, 180 kV and 250 kV, respectively) and with Co gamma radiation. The transfer chamber calibration factors obtained at the NIST and at the ENEA agreed with one another to 0.03 % for Co gamma radiation and between 0.1 % to 0.8 % for the medium energy x-ray beam codes.
对美国国家标准与技术研究院（NIST）和意大利新技术、能源与环境署（ENEA）的中能X射线和钴源γ射线空气比释动能标准进行了比较。该比较于1994年6月在ENEA进行。使用了来自NIST的两个不同的传递腔进行比较。测量是在与国际计量局（BIPM）使用的辐射质量相似的条件下进行的（分别为100 kV、135 kV、180 kV和250 kV的产生电压）以及钴源γ辐射条件下进行的。在NIST和ENEA获得的传递腔校准因子，对于钴源γ辐射，彼此之间的一致性为0.03%；对于中能X射线束规范，一致性在0.1%至0.8%之间。
