Optical absorption of Tl+ ions in KBr1-xIx:TlI mixed crystals

LOW ENERGY ACCELERATORS AND RADIATION APPLICATIONS

Optical absorption of Tl⁺ ions in KBr_1-xI_x:TlI mixed crystals

Eswaran P，

Ravisankar R，

Nagarajan S

Nuclear Science and Techniques

Vol.20, No.4

pp.208-218

Published in print 20 Aug 2009

DOI：10.13538/j.1001-8042/nst.20.208-218

45602

Optical absorption spectra of the mixed crystals of KBr_1-xI_x:Tl⁺ crystals studied at room temperature are reported. The absorption spectra indicated the appearance of additional bands on the low energy side of the Characteristic A, B and C absorption bands of KBr:Tl⁺ single crystals with increasing iodine composition. Comparing with earlier reports, the additional bands were attributed to the complex Tl⁺ centers in the mixed configuration surrounded by Br^-and I^- ions as nearest neighbors. The absorption spectra of gamma irradiated mixed crystals showed F band, which shifts towards low energy side with the composition of iodine ions in the mixed crystals.

F-centersKBr1-x Ix:TlI mixed CrystalsOptical absorptionTl+ ionsMixed halidesA-absorption band

References

[1]

Jacobs P W M. J Phys Chem Solids, 1991, 52: 35-67.

[2]

Ranfagni D, Mugnai M, Bacci G, et al. Adv Phys, 1983, 32: 823-826.

[3]

Taiju T P W M, Jacobs J. Phys Chem Solids, 1991, 52: 69-80.

[4]

Kynev K, Tabakova V. J Phys C: Solid State Phys, 1981, 4: 1069-1074.

[5]

Cruz E Z, Negron A, Ramos A A, et al. Murrieta Radiat Phys Chem. 2001, 61: 443-444.

[6]

Hashimoto S, Tango M. J Phys Soc Japan, 1998, 67: 3322-3323.

[7]

Shinoya S, William M Y. Phosphor handbook. Washington: CRC Press, 2000.

[8]

Blasse G, Grabmaier C. Luminescent materials. Berlin: Springer Verlac, 1995.

[9]

Von Seggern H, Meijerink A, Voigt T, et al. J Appl Phys, 1989, 66: 4418-4424.

[10]

Nanto H, Takei Y, Nishimura A, et al. Processing of the SPIe, 2006, 6142: 985-987.

[11]

Ganapathy S N, SelvaSekaraPandian S, Pal H, et al. Mater Lett, 2003, 57: 2021-2028.

[12]

Kleemann W, Fischer F, Physik Z. Physics, 1966, 197: 75-100 (in German).

[13]

Hashomoto S, Mori M, Ichimura N, et al. Thin Solid Films, 2001, 386: 14-18.

[14]

Kristofel N N, Izv A N. ESSR Ser Fiz Mat, 1968, 2: 197-199.

[15]

Sangster J, Pelton A D. J Phys Chem, 1987, 16: 509-561.

[16]

Schweizer S, Phys Stat Sol (a), 2001, 187: 335-393.

[17]

Nagarajan S, Eswaran P. Nucl Instrum Methods Phys Res B, 2009, 267: 1800-1806.

[18]

Dong C. J Appl Cryst, 1999, 32: 838-838.

[19]

Michael D J, Teegarden K. J Phys Chem Solids, 1968, 29: 2141-2151.

[20]

Halperin A. J Lumin, 1978, 16: 457-469.

[21]

Tarasova L I, Shatseva L S. Opt Spectrosc, 1976, 41: 605-608.

[22]

Etzel H W, Patterson D A. Phys Rev, 1958, 112: 1112-1116.

[23]

Bobkova I S, Ivanova N I. Opt Spectrosc, 1984, 56: 521-524.

[24]

Gindina R I, Elango A A, Khaav A A, et al. Opt Spectrosc, 1973, 34: 63-66.

[25]

Tsuboi T. Can J Phys, 1976, 54: 2418-2421.

[26]

Agullo L F, Lopez J F, Jaque F. Cryst Latt Def Amorph Mater, 1982, 9: 227-252.

[27]

Reitz R A, Butler W A, John R, et al. J Chem Phys, 1962, 37: 1893-1897.

[28]

Smakula A, Maynard N C, Repucci A, et al. Phys, Rev. 1963, 130: 113-119.

[29]

Sastry S B S, Muralidharan G, Nagarajan S. Cryst Latt Def Amorp Mater, 1987, 17: 211-215.

[30]

Hageseth G T. Phys Rev B, 1972, 5: 4060-4064.

[31]

Winter E M, Wolfe D R, Christy R W. Phys Rev, 1969, 186: 949-952.