The 'GAPHYOR' System: A Computerized Retrieval System of the Properties of Atoma, Molecules, Gases and Plasmas

摘要

GAPHYOR (GAz PHYsique ORsay) is a retrieval system of -the simple properties of atoms and molecules (energy levels, lifetimes, dipole moments, polarizability etc.), of the interaction properties between these particles (cross-sections, reaction rates etc) and of the macroscopic properties of the corresponding gases (viscosity, electronic and ion mobility, thermo¬dynamic functions etc.). The chemical systems described must be based on a small number of elements (l to 4 in the most recent version) and composed of molecules having 8 atoms at the most. In the present article the fundamental principles of GAPHYOR are described and by means of a few simple statistics the present state of the bank after five years of operation is analysed.