ISO 12721-2000 无损检测 热中子射线照相试验 中子束L/D比率的测定

标准号：ISO 12721-2000
中文标准名称：无损检测 热中子射线照相试验 中子束L/D比率的测定
英文标准名称：Non-destructive testing - Thermal neutron radiographic testing - Determination of beam L/D ratio
标准类型：H26
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：H26
国际标准分类号：19.100
适用范围：This International Standard defines an empirical technique for the measurement of the effective collimation ratio and effective L/D of thermal neutron radiography beams for values between 20 and 1 000. The technique is based upon analysis of a neutron radiographic image and is independent of measurements and calculations based on physical dimensions of the collimator system. The device described in this International Standard has been developed and tested using Gd foil converters with a single emulsion, high resolution film in vacuum cassettes.