Resonance Absorption by Nuclear Magnetic Moments in a Solid

The suggestion is also made that Co& may be strongly dissociated by the metastable Xe atoms (and H~O some- what less strongly), thus producing oxygen atoms which combine to form the O~molecules; (D(CO~) =5.5 v, D{HgO) =5.0 v). If so, the fact that CO did not yield the bands would indicate that the dissociation energy of CO is greater than the energy of the upper metastable state of Xe, namely 9.4 volts. (Energy of lower metastable state equals 8.3 v. ) This appears to be direct evidence in favor of the 9.6-volt value of D(CO) as determined by Hagstrum and Tate from appearance potentials in the mass spectro- graph, or for the 11.11 v-value obtained in a recent spectral analysis by Gaydon and Penney/ but against the 9.14-volt value determined from certain predissociation data. ' The higher value appears to be more in accord also with thermochemical data as brought out by Hagstrum and Tate, ' a.nd also by Asundi and Samuel. '