Assertion: gamma ray | /r/Desires | large amounts
Facets:
value: due to their penetrating nature
type: CAUSE
Source sentences:
text: Due to their penetrating nature, gamma rays require large amounts of shielding mass to reduce them to levels which are not harmful to living cells, in contrast to alpha particles, which can be stopped by paper or skin, and beta particles, which can be shielded by thin aluminium.