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一、国内外发展概况β反向散射(Beta Backscatter,简称BBS)测厚技术是一种先进的无损物理测厚法,广泛用于金、银、铅锡合金等金属和非金属复盖层,近廿年来在国外被普遍用作工厂和实验室的常规检测手段。早在五十年代末,Muller和Zumwatt首次提出利用放射性同位素所放射的β射线在物体上的反散射来测量复盖层厚度的基本理论和计算公式。1961年美国双城试验公司(Twin city Testing Corp.)试制出第一台牌号为“Betascope”的β测厚仪,从此,国际
First, the development at home and abroad Beta backscatter (Beta Backscatter, referred to as BBS) thickness measurement technology is an advanced nondestructive physical thickness measurement method, widely used in gold, silver, pewter and other metal and nonmetallic cover, Nearly 20 years abroad are widely used as a routine test of factories and laboratories. As early as the late 1950s, Muller and Zumwatt first proposed the basic theories and formulas for measuring the thickness of overburden using the backscattering of β-rays radiated by radioisotopes on objects. In 1961, Twin City Testing Corp. developed the first Betascope β thickness gauge. Since then,