An alpha-particle decay. In alpha decay, shown in Fig. 3-3, the nucleus emits a 4 He nucleus, an alpha particle. Alpha decay occurs most often in massive nuclei that have too large a proton to neutron ratio.An alpha particle, with its two protons and two neutrons, is a very stable configuration of particles.n alpha-particle decay. In alpha decay, shown in Fig. 3-3, the nucleus emits a 4 He nucleus, an alpha particle. Alpha decay occurs most often in massive nuclei that have too large a proton to neutron ratio.
gite. n. A simple, usually inexpensive rural vacation retreat especially in France. [French.
gizâ¢zard. 1. Also called ventriculus. the thick-walled, muscular lower stomach of many birds and reptiles that grinds partially digested food, often with the aid of ingested gravel. 2. a similar structure in the foregut of arthropods and annelids, often lined with chitin and small teeth.lso called ventriculus. the thick-walled, muscular lower stomach of many birds and reptiles that grinds partially digested food, often with the aid of ingested gravel. 2. a similar structure in the foregut of arthropods and annelids, often lined with chitin and small teeth.