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.
A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earthâs surface. A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earthâs surface. By relating seemingly unrelated data, GIS can help individuals and organizations better understand spatial patterns and relationships.