A. Kling et al., DEPENDENCE OF THE LI7(P,ALPHA)HE-4 MINIMUM YIELD ON THE MG-CONCENTRATION FOR PROTON CHANNELING IN LINBO3-MG, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 85(1-4), 1994, pp. 490-493
The dependence of the Li-7(p, alpha)He-4 minimum yield on the magnesiu
m concentration has been investigated for lithium niobate single cryst
als doped with MgO (between 0 and 9 mol% in the congruent melt) using
proton channeling in combination with NRA. For all experimentally inve
stigated axes - except the [0001]-axis - systematic Mg-concentration d
ependent variations of the Li-NRA minimum yield have been observed. Th
e comparison of these experimental observations with the results of th
e evaluations based on the continuum potentials supports the assignmen
ts for the lattice sites of Mg from recent IBA-experiments.