@article{articlef649d7c2,
title   = {Optical excitation of paramagnetic nitrogen in chemical vapor deposited diamond},
author = {Graeff, C F O and Hoher, E and Nebel, C E and Stutzmann, M and Guttler, H and Zachai, R},
year = {1996},
doi = {10.1063/1.117965},
journal   = {Applied Physics Letters}
}