“…(see, e.g., Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). Indeed, this material has a high density (6.71 g/cm 3 ), high effective atomic number (Z¼59), fast decay time (20-60 ns), large light yield (in some samples, up to 11,500 photons/MeV [11] or 12,500 photons/ MeV [19]) which is about 20-25% of that of NaI:Tl [1,5,20,21] and considerably larger compared to Bi 4 Ge 3 O 12 (BGO) (8000-9000 photons/MeV (see, e.g., Refs.…”