Radiation-detected optical pumping in solids - Matsuki, S.; Shimomura, K.; Ogawa, I.; Suzuki, K.; Hamada, S.; Nakamura, T.; Okuno, H.; Koizumi, M.; Inabe, N.; Fukashiro, Y.; Sunaoshi, H.; Wada, M.; et al. (Springer, 1992)
http://dx.doi.org/10.1007/BF02398632
Keywords: U