Absolute non-radiative energy conversion efficiency spectra in Ti3+ : Al 2O 3crystals measured by non-contact quadrature photopyroelectric spectroscopy A. Mandelis, J. Vanniasinkam et S. BuddhuduJ. Phys. IV France, 04 C7 (1994) C7-393-C7-396DOI: https://doi.org/10.1051/jp4:1994792
