本文介绍一种利用~(10)B(n,α)~7Li反应显示指纹痕迹的灵敏方法。由于从显示指纹的原理上就与传统的光学鉴别不同,因此,不仅灵敏度高,而且突破了光学显示指纹的一些局限。初步实验结果表明,它可望在越来越复杂的指纹侦破中发挥作用。 1.α径迹指纹显象的原理 使用固体径迹探测器可以记录各种重带电粒子的径迹。我们把天然硼粉当做荧光粉洒在指纹区,由于指纹汗渍的吸附作用,硼原子将以指纹形象分布在 This paper presents a sensitive method of using ~ (10) B (n, α) ~ 7Li reaction to reveal fingerprints. Since the principle of displaying the fingerprint is different from the traditional optical authentication, the invention not only has high sensitivity but also breaks through some limitations of the optical display fingerprint. Preliminary experimental results show that it is expected to play an increasingly important role in fingerprinting. 1. The principle of α track fingerprint The use of solid track detector can record a variety of heavy charged particles track. We use natural boron powder as a phosphor in the fingerprint area. Due to the adsorption of fingerprint perspiration, the boron atoms will be distributed as fingerprint images