People have long begun considering the relativity of the atmospheric radioactivity with the sun activity and the atmospheric conditions.An annular eclipse of the sun took place in China on the 23rd September, 1987. On...People have long begun considering the relativity of the atmospheric radioactivity with the sun activity and the atmospheric conditions.An annular eclipse of the sun took place in China on the 23rd September, 1987. On this occasion, we performed an experimental observation of the γ-rays from 100 keV to 830 keV in atmosphere at sea level at Tianchang County in Anhui Province which is located at the southern edge of the annular eclipse band, i. e. at longitude 119°01′E, latitude 30°41′N, at an altitude of 20.8 m. The exact time of the annulr eclipse of the展开更多
In 1924, WU You-xun discovered that the ratio of elastic to inelastic cross section of γ-ray scattering on the sample varies with atomic number of the components of the sample when he studied Compton effect. During t...In 1924, WU You-xun discovered that the ratio of elastic to inelastic cross section of γ-ray scattering on the sample varies with atomic number of the components of the sample when he studied Compton effect. During the last few years a new nuclear technique of the element analysis——γ-ray scattering analytical technique has been developed based on this phenomenon. The procedure includes展开更多
文摘People have long begun considering the relativity of the atmospheric radioactivity with the sun activity and the atmospheric conditions.An annular eclipse of the sun took place in China on the 23rd September, 1987. On this occasion, we performed an experimental observation of the γ-rays from 100 keV to 830 keV in atmosphere at sea level at Tianchang County in Anhui Province which is located at the southern edge of the annular eclipse band, i. e. at longitude 119°01′E, latitude 30°41′N, at an altitude of 20.8 m. The exact time of the annulr eclipse of the
基金Project supported by the National Natural Science Foundation of China
文摘In 1924, WU You-xun discovered that the ratio of elastic to inelastic cross section of γ-ray scattering on the sample varies with atomic number of the components of the sample when he studied Compton effect. During the last few years a new nuclear technique of the element analysis——γ-ray scattering analytical technique has been developed based on this phenomenon. The procedure includes
