E CRUZ-ZARAGOZA1*, G CEDILLO DEL ROSARIO1,2, M GARCÍA
HIPÓLITO2
, J MARCAZZÓ3
, J M HERNÁNDEZ A4
, E CAMARILLO4
AND
H MURRIETA S4
1 Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A. P. 70-543, 04510 Ciudad de México, México
2 Posgrado en Ciencia e Ingeniería de Materiales, Instituto de Investigaciones en Materiales-UNAM, A. P. 70-360, 04510 Ciudad de México, México
3 Instituto de Física Arroyo Seco-CIFICEN, CONICET-UNCPBA, Pinto 399, 7000 Tandil, Argentina
4 Instituto de Física, Universidad Nacional Autónoma de México, A. P. 20-364, 01000 Ciudad de México, México
*Email: ecruz@nucleares.unam.mx
Abstract The optical absorption of zinc tetraborate at different concentrations of the terbium impurity (0, 0.5, 1, 2, 4, 8 mol%) was analyzed. The radioluminescence (RL) emission spectra was obtained after beta irradiation of a 90Sr/90Y source. The RL spectrum showed the characteristics bands of Tb3+ with two main emissions at 489 nm and 546 nm which corresponding to the5 D4 →7 F6 and 5 D4 →7 F5 transitions respectively in this ion. The OSL and TL characteristics have been analyzed. The stimulation blue light (497 nm) of a diode laser at 500 mA was used to bleach the thermoluminescent (TL) signals obtained with 5Gy of 60Co source. The two main glow peaks (79 and 161 °C) are sensitives under 497 nm stimulation, and they were shifted to higher temperature values and faded their TL intensities. Similar behavior of TL glow curves before and after OSL stimulation with blue light was observed when the samples were exposed to 30 Gy gamma dose of 137Cs irradiator. The OSL signal response was linear with the dose range of 1-10 Gy and increased their response up to 200 Gy gamma dose. The OSL shows a bleaching sensitive shallow traps and diminishing the intensity of the TL glow curves remaining a complex traps distribution. The RL, TL and OSL properties were investigated in Zn(BO2 )2 :Tb3+ phosphor.
DOI: https://doi.org/10.15415/jnp.2017.51016
LINK: http://dspace.chitkara.edu.in/jspui/bitstream/1/876/1/51016_JNP_%20ECruz-Zaragoza.pdf
1 Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A. P. 70-543, 04510 Ciudad de México, México
2 Posgrado en Ciencia e Ingeniería de Materiales, Instituto de Investigaciones en Materiales-UNAM, A. P. 70-360, 04510 Ciudad de México, México
3 Instituto de Física Arroyo Seco-CIFICEN, CONICET-UNCPBA, Pinto 399, 7000 Tandil, Argentina
4 Instituto de Física, Universidad Nacional Autónoma de México, A. P. 20-364, 01000 Ciudad de México, México
*Email: ecruz@nucleares.unam.mx
Abstract The optical absorption of zinc tetraborate at different concentrations of the terbium impurity (0, 0.5, 1, 2, 4, 8 mol%) was analyzed. The radioluminescence (RL) emission spectra was obtained after beta irradiation of a 90Sr/90Y source. The RL spectrum showed the characteristics bands of Tb3+ with two main emissions at 489 nm and 546 nm which corresponding to the5 D4 →7 F6 and 5 D4 →7 F5 transitions respectively in this ion. The OSL and TL characteristics have been analyzed. The stimulation blue light (497 nm) of a diode laser at 500 mA was used to bleach the thermoluminescent (TL) signals obtained with 5Gy of 60Co source. The two main glow peaks (79 and 161 °C) are sensitives under 497 nm stimulation, and they were shifted to higher temperature values and faded their TL intensities. Similar behavior of TL glow curves before and after OSL stimulation with blue light was observed when the samples were exposed to 30 Gy gamma dose of 137Cs irradiator. The OSL signal response was linear with the dose range of 1-10 Gy and increased their response up to 200 Gy gamma dose. The OSL shows a bleaching sensitive shallow traps and diminishing the intensity of the TL glow curves remaining a complex traps distribution. The RL, TL and OSL properties were investigated in Zn(BO2 )2 :Tb3+ phosphor.
DOI: https://doi.org/10.15415/jnp.2017.51016
LINK: http://dspace.chitkara.edu.in/jspui/bitstream/1/876/1/51016_JNP_%20ECruz-Zaragoza.pdf
