, NH

A detailed dissociative electroionization study of NH3 has recently been completed /1/. The kinetic energy distributions and ionization efficiency curves of all fragment ions, including H+, were investigated in ammonia and ammonia-d. The photoabsorption and photoionization of NH in the wavelength region of 8-112 nm have recently been published by Samson et al. /2/. The cross sections and appearance energies of the fragment ions are measured. As shown in table 1, excepting the NH ion, the onset energy values published by these authors disagree with those determined by electron impact. The dissociative photoionization of NH3 has been examined in the wavelength region of 50-112 nm and 20-45 nm by using synchrotron radiation dispersed by a 1m NIM- and a TGM-monochromator respectively. Only the preliminary results and the most salient features will be reported