Determination of Isotope Abundance Ratio of Lead in Beijing Atmospheric Aerosol and Lead Source Study 北京冬季大气颗粒物中铅的同位素丰度比的测定和来源研究
By this method the magnitude of isotope shift, isotope abundance ratio, Lorentz width and Doppler width of the spectral profile can be deduced. 由此可获得同位素效应的光谱线位移量、同位素的丰度比及其光谱线的洛仑兹宽度与多普勒宽度。
Therefore, even the ratio of the abundance ratio of the two essential standards reaches 5,the relative derivation of results determined by the two methods as mentioned above is much less than 0.01%. 这样，即使在2个基本标准的丰度比的比值达到5的条件下，2种方法的标定结果的相对偏差远小于0.
Surprisingly for astronomers and nuclear physicists, the abundance ratios of thorium to other heavy elements are very similar to ratios found for Milky Way stars. 出乎意料的天文学家和核物理学家丰比率钍等重元素非常相似比率发现银河系恒星.