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作者先前设了α射线辐射吸收法的露点湿度计[1,2]和熔点测量[3]。在本装置中应用的原理是利用β射线在雾覆盖的金属表面上散射的减少。β射线散射的减少是由于散射表面材料有效原子序数的减少引起,因为金属通常地有大的原子序数,而组成雾的元素具有小的原子序数。要实现这个原理会碰到许多困难。首先雾一开始形成,它大约是10~(-4)g/cm~2,只引起β射线散射很少的变化。因此,为了使变化尽可
The authors previously set the dew point hygrometer [1, 2] and melting point measurement [3] of α ray radiation absorption method. The principle used in this device is the use of beta rays to reduce the scattering of light on a metal surface covered by a fog. The reduction in beta ray scattering is due to the reduction of the effective atomic number of the scattering surface material because the metal usually has a large atomic number while the element that constitutes the fog has a small atomic number. To achieve this principle will encounter many difficulties. First of all, fog begins to form, which is about 10 ~ (-4) g / cm ~ 2, causing only a small change in β-ray scattering. Therefore, in order to make changes as much as possible