a radioactive process in which an alpha particle is emitted from the nucleus of an atom, decreasing its atomic number by two.
the radioactive decay process resulting in emission of alpha particles
The radioactive decay of an atomic nucleus by emission of an alpha particle (two protons bound to two neutrons). When an element undergoes alpha decay, its atomic number decreases by two.
- Alpha emitter
noun a radioactive isotope that emits alpha particles Historical Examples One such reaction uses alpha particles emitted by polonium-210 (or some other alpha emitter) to bombard the element beryllium. The Atomic Fingerprint Bernard Keisch
- Alpha ev6
alpha ev6 EV6
- Alpha female
noun the dominant female animal in a pack Examples The pack deferred to the alpha female. See alpha girl Word Origin fr alpha male Contemporary Examples ReasonTV interviews Kay Hymowitz about why the “alpha female” does not exist on a large scale in America. The Alpha Female’s Dilemma Ilana Glazer February 4, 2013 Most packs […]
a serum produced during pregnancy, useful in the prenatal diagnosis of multiple births or birth defects. Abbreviation: AFP. noun a protein that forms in the liver of the human fetus. Excessive quantities in the amniotic fluid and maternal blood may indicate spina bifida in the fetus; low levels may point to Down’s syndrome afp alpha-fetoprotein […]
- Alpha fiber
alpha fiber alpha fiber n. Any of the large somatic motor or proprioceptive nerve fibers conducting impulses at rates near 100 meters per second.