A cloud chamber experiment is described, in which the angular distribution of secondary particles produced in nuclear interaction by high energy cosmic ray particles with paraffin has been studied.

本文描述一个利用云室研究高能宇宙线粒子与石蜡的核作用中次级粒子角分布的实验。

youdao

It is designed to detect showers of billions of secondary particles created when cosmic ray particles rain down on the Earth.

BBC: Black hole: A source of 'cosmic bullets'?