抄録
The velocity dependence of the integral cross section for scattering of H atom by H2 molecule was measured in the velocity range 1.62 to 5.76 km/sec. For detection of H atoms a ZnO single crystal was used, which showed high sensitivity and selectivity for H atoms. The experimental data were analyzed in terms of the three parameter exp (α, 6) potential, by combining the data with absolute integral cross sections measured by Gengenbach et al. for D–H2 scattering. The exp(12,6) potential (α=12, ε=1.78 meV, Rm=3.52 Å) and the exp (13, 6) potential (α=13, ε=2.10 meV, Rm=3.42 Å) reproduced the experimental results equally well (ε is the well depth and Rm the location of the potential minimum). Further measurements at lower velocities were found to be essential for the unique determination of the parameters.
