functions, soils, atom, atoms, ions, model, states, function, orbitals, state, approximation, levels, systems, ion, impurity, impurities, system, series, wavefunctions, value, donor, level, case, donors, plasma, lines, values, orbital, species, spectrum, energy, formula, rocks, wavefunction, potential, materials, behavior, transitions, rock, theory, spectra, energies, sites, molecules, electron, plasmas, vibrations, origin, orbit, manifold, limit, equation, deposits, calculations, nucleus, center, orbits, electrons, eigenfunctions, transition, site, acceptors, frequencies, carbon, manifolds, exciton, projectiles, qualities, solutions, excitons, soil, formulae, neon, targets, target, consciousness, centers, wave, unctions