Beryllium-7 in Rain Water
降水中のベリリウム7

Y. Miyake, Y. Ohtsuka
1964 Papers in Meteorology and Geophysics  
in Tokyo rain water which is produced in the upper atmosphere through the spallation of air molecules by the cosmic ray was determined.
doi:10.2467/mripapers1950.15.1_89 fatcat:uxofbj62a5bqvkebiks3pupluq