An apparently high flux of primary cosmic-ray He-nuclei at 41 deg N mag.
Unexpected excess of primary cosmic ray helium nuclei flux value in nuclear photographic emulsions
HEAVY NUCLEUS↗
Engineering topics
Publications and source records attributed to Klarmann, J..
Unexpected excess of primary cosmic ray helium nuclei flux value in nuclear photographic emulsions
Primary cosmic ray alpha particle flux measured in nuclear photographic emulsions during high altitude balloon flight