I was recently reading the Wikipedia Page for Europa as I am interested in terra-formation. In one of the sentences, it says that:
The radiation level at the surface of Europa is equivalent to a dose of about 5400mSv (540 rem) per day, an amount of radiation that would cause severe illness or death in human beings exposed for a single day.
I know that there are different types of radiation (gamma rays, visible light, infrared, etc.) and was wondering, what is the makeup of the radiation which hits Europa?