Energy distributions of CD4 and CD3 chemically released from graphite by D+ and D0/Ne+ impact

Abstract Time-of-flight (TOF) experiments were performed to determine the energy distributions of CD 4 and CD 3 chemically released from graphite by energetic D + ion impact or by a synergistic reaction of Ne + ions and D atoms at temperatures near 800 K and room temperature (RT). The energy distribution of CD 4 chemically released from graphite at 800 K by 400 eV D + impact can be fitted by two Maxwell–Boltzmann (MB) distributions, one corresponding to the target temperature (800 K) and a faster one (40%) corresponding to 2000 K. In the synergistic reaction of D 0 atoms and 3 keV Ne + ions impacting on graphite at 830 K nearly all formed CD 3 are released by an MB distribution corresponding to 830 K. At room temperature, the time-dependent behavior of the CD 4 signal, after stopping the D + or the Ne + irradiation in the synergistic reaction case, indicates that no physical sputtering process is involved in this reaction. During synergistic reaction of graphite at room temperature with D 0 /Ne + , the released CD 4 can be fitted by two MB distributions corresponding to 1200 and 285 K.