alpha particle
- n a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes
alpha particle :
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- Mars lake of life?
Mastcam mosaic of the Yellowknife Bay formation. This is a view from the base of an exposed section up through Sheepbed, Gillespie Lake, and basal Glenelg members. Locations of drill holes and Alpha Particle X-Ray Spectrometer (A PXS) measurement.
Dec. 9, 2013 - Fox News