DEFECTS AFTER NEUTRON CAFTURE AND INTRINSIC FLUORINE SELF-DIFFUSION IN CaF2 M. GRUPP, H. ACKERMANN, D. DUBBERS, H. GRUPP, P. HEITJANS and H.J. STÖCKMANN J. Phys. Colloques, 37 C7 (1976) C7-538-C7-539 DOI: 10.1051/jphyscol:19767123