| 单词 | beta particle |
| 释义 | beta particle (once / 347627 pages) n WORD FAMILY beta particle: beta particles USAGE EXAMPLESCesium emits two types of radiation - beta particles and gamma rays- that have enough energy to damage human tissue. Washington Times(Sep 01, 2015) Beta particles don’t travel but a foot or so in air and are only dangerous if you ingest the source material. Forbes(Oct 27, 2013) Beta particles are very weakly penetrating, and the workers' protective overalls would have substantially limited their exposure. BBC(Oct 09, 2013) n a high-speed electron or positron emitted in the decay of a radioactive isotope Hyper particle, subatomic particle a body having finite mass and internal structure but negligible dimensions |
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