4.6 Reemission of Incident Ions
65
Fig. 4.15 Steady-state reemission of atoms and molecules from the front surface and the back
surface as a function of sample temperature for Mo (a, b), Ta, (c, d), and W (e, f) under irradiation
of 3 keV D 3
+ ions (i.e. 1 keV/D + ) incident on the sample at an angle of 35° with respect to the
sample normal. The reemission data were normalized by setting a single normalization constant for
all three specimens based on the average value of the molecular reemissions at ~1000 K; thus the
normalized value of the sum of the molecular reemission from both surfaces at 1000 K is 1 ± 0.1.
Solid symbols are for D 2 and open symbols are for D° (D atom). Different symbol shapes represent
data taken on different days, in order of open then closed circles, open then closed squares, and open
then closed triangles. The cumulative fluence associated with each data set is approximately (2–3)
× 10 23 D m −2 The solid lines correspond to reemission results for pyrolytic graphite (reprinted
with permission from [29])