[1] Melcher C L, Schmand M, Eriksson M, et al. IEEE Trans. Nucl. Sci., 2000, 47(3): 965.

[2] Melcher C L, Spurrier M A, Eriksson L, et al. IEEE Trans. Nucl. Sci., 2003, 50(4): 762.

[3] Jacobsohn L G, Lee J K, Bennett B L, et al. J. Lumin., 2007, 124(1): 5.

[4] Pidol L, Guillot-Noel O, Kahn-Harari A, et al. J. Phys. Chem. Solids., 2006, 67(4): 643.

[5] Cooke D W, Muenchausen R E, McClellan K J, et al. Opt. Mater., 2005, 27(12): 1781.

[7] Mu G, Jia L C, Liu X L, et al. J. Alloys Comp., 2010, 502(1): 190.

[8] Jia L C, Gu M, Liu X L, et al. IEEE Trans. Nucl. Sci., 2010, 57(3): 1268.

[9] Spurrier M A, Szupryczynski P, Rothfuss H, et al. J. Cryst. Growth, 2008, 310(7-9): 2110.

[10] Ding D Z, Feng H, Ren G H, et al, IEEE Trans. Nucl. Sci., 2010, 57(3): 1272.

[11] Derdzyan M, Petrosyan A, Butaeve T, et al. Nucl. Instr. Methods. Phys. Res. A, 2005, 537(1-2): 200.

[12] Dorenbos P, Bos A J J, Melcher C L, et al. J. Phys: Condens. Matter, 1994, 6(22): 4167.

[13] Visser R, Melcher C L, Schweitzer J S, et al. IEEE Trans. Nucl. Sci., 1994, 41(4): 689.

[14] Chen Y H, Liu B, Shi C S, et al. Nucl. Instr. Methods. Phys. Res. A, 2005, 537(1-2): 31.

[15] Cooke D W, Blair M W, Smith J F, et al. IEEE Trans. Nucl. Sci., 2008, 55(3): 1118.

[16] Vedda A, Nikl M, Fasoli M, et al. Phys. Rev B, 2008, 78(19): 195123-1.

[17] Spurrier M A, Szupryczynski P, Yang K, et al. IEEE Trans. Nucl. Sci., 2008, 55(3): 1178.

[18] Syntfeld-Kazuch A, Moszynski M, Szczesniak T, et al. IEEE Trans. Nucl. Sci., 2009, 56(5): 2972.

[19] Wojtowicz A J, Lempichi A, Wisniewski D, et al. IEEE Trans. Nucl. Sci., 1996, 43(3):2168.

[20] Liu B, Oi Z M, Gu M, et al. J. Phys.: Condens. Matter, 2007, 19(43): 436215.