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月岩和陨石形成时捕获了太阳风中的Ａｒ同位素。作者对恩施陨石采用４０Ａｒ／－３６Ａｒ技术，并对Ｃｌ的诱发产物进行了校正后，获得了４６００Ｍａ前太阳风中４０Ａｒ／３６Ａｒ比值是０．８９±０．４４。它表明地球大气圈中４０Ａｒ／３６Ａｒ比值经历了从０．８９到２９５．５的演化过程，影响这一过程的主要因素是地球的去气作用。
The lunar rocks and meteorites capture the Ar isotopes in the solar wind. The author used 40Ar / -36Ar technology for Enshi meteorites and calibrated the induced products of Cl to obtain 40Ar / 36Ar ratio of 0.89 ± 0.44 in the solar wind before 4600Ma. It shows that the 40Ar / 36Ar ratio of the Earth’s atmosphere has experienced evolution from 0.89 to 295.5. The main factor affecting this process is the Earth’s degassing effect.