抄録
The tetrahedron model in the previous paper for the electron binding in water is re-examined. The energy levels, the oscillator strength and the ESR hyperfine splitting constant of the hydrated electron have been calculated for four types of water molecules and for the various sizes of the tetrahedron. It is concluded that a stretched form of water molecules most satisfactorily explains the experimental data. As the size of the tetrahedron increases, the excitation energy decreases for each form.