PMID- 29954511
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20191120
IS  - 1533-4880 (Print)
IS  - 1533-4880 (Linking)
VI  - 18
IP  - 10
DP  - 2018 Oct 1
TI  - Thermoluminescence from Cu Doped Lithium Tetraborate Irradiated with X-ray and gamma 
      Using (137)Cs Radioactive Source.
PG  - 6919-6927
LID - 10.1166/jnn.2018.15532 [doi]
AB  - Lithium tetraborate (Li2B4O7) pellets prepared by using water/solution assisted 
      method were synthesized and characterized. Copper was used as doping material in 
      order to enhance the Li2B4O7 thermoluminescent properties. For synthesis heating 
      temperature parameters were defined at 750  degrees C for 2 hr, followed by 150  degrees C for 
      another 2 hr. The materials were produced at five different Cu concentrations: 
      0.02, 0.04, 0.06, 0.08, and 0.1 wt%. The luminescent and morphological 
      characterizations were performed by X-ray diffraction (XRD), Scanning electron 
      microscope (SEM), Photoluminescence (PL), and Ultraviolet-visible spectroscopy 
      (UV-Vis). XRD and SEM analysis of intrinsic and doped materials confirmed the 
      obtained Li2B4O7 structure and show its morphology. XRD patterns of the Li2B4O7 
      matched a tetragonal crystal structure. Crystals of Li2B4O7 of an average size of 
      50 nm were obtained. The presence of the copper dopant was confirmed in crystals 
      of Li2B4O7:Cu by SEM-EDS (energy dispersive spectroscopy X-ray). The emission 
      spectrum of Cu doped Li2B4O7 showed a prominent peak at 367 nm, while the main 
      UV-Vis absorption was observed from 240 nm to 300 nm due to Cu+ ion 3d10 --> 3d9 4s 
      transitions. The thermoluminescent (TL) response was studied for both gamma radiation 
      and X-ray. A 661.7 keV gamma radiation using a 137Cs source at doses of 50, 100, 200, 
      300, 400 and 500 mGy was applied to Li2B4O7:Cu (0.1 wt%) pellets. An X-ray source 
      was used at doses of 600, 800 and 1000 mGy to irradiate pellets of Li2B4O7:Cu 
      (0.02, 0.04, 0.06, 0.08 and 0.1 wt%). A linear TL response was observed for both 
      X-ray and gamma radiation. The kinetic parameters were calculated using the peak 
      shape method for the Li2B4O7:Cu (0.1 wt%).
FAU - Thiyagarajan, Swarnapriya
AU  - Thiyagarajan S
FAU - Vallejo, Miguel A
AU  - Vallejo MA
FAU - Kumar, Senthil
AU  - Kumar S
FAU - Ceron, Pablo V
AU  - Ceron PV
FAU - Rivera, Esteban
AU  - Rivera E
FAU - Navarro, Ricardo
AU  - Navarro R
FAU - Jayaramakrishnan, V
AU  - Jayaramakrishnan V
FAU - Vega-Carrillo, Hector Rene
AU  - Vega-Carrillo HR
FAU - Sosa, Modesto A
AU  - Sosa MA
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Nanosci Nanotechnol
JT  - Journal of nanoscience and nanotechnology
JID - 101088195
EDAT- 2018/06/30 06:00
MHDA- 2018/06/30 06:01
CRDT- 2018/06/30 06:00
PHST- 2018/06/30 06:00 [entrez]
PHST- 2018/06/30 06:00 [pubmed]
PHST- 2018/06/30 06:01 [medline]
AID - 10.1166/jnn.2018.15532 [doi]
PST - ppublish
SO  - J Nanosci Nanotechnol. 2018 Oct 1;18(10):6919-6927. doi: 10.1166/jnn.2018.15532.