THE INFLUENCE OF HYDROGEN AND DEUTERIUM ZERO-POINT VIBRATIONS ON ELECTRON-SPIN-RESONANCE PARAMETERS OF THE ATOMS MATRIX-ISOLATED IN SOLID XENON

Hydrogen and deuterium atoms are stabilized in a xenon matrix from the gas phase and investigated by electron spin resonance (ESR). It is sh own that H and D atoms are trapped in substitutional positions of the matrix crystal lattice. The ESR linewidths of H and D show an isotope effect and are found to be greatly increased (up to 80%) by the zero-p oint vibrations of the atoms. The charge-transfer coefficient v(r) = g amma exp(-etar) between matrix atom and hydrogen atom is estimated. A comparison is carried out between experimental and theoretical values for the relative matrix shift of the H atom hyperfine constant.