Pijush Bhattacharya

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The presence of arsenic in irrigation water and in paddy field soil were investigated to assess the accumulation of arsenic and its distribution in the various parts (root, straw, husk, and grain) of rice plant from an arsenic effected area of West Bengal. Results showed that the level of arsenic in irrigation water (0.05–0.70 mg l−1) was much above the WHO(More)
Development of the Europium-doped Strontium Iodide scintillator, SrI<sub>2</sub>(Eu), involves advances in crystal growth, optics and readout methodology for prototype detectors. We have demonstrated energy resolution of 3% at 662 keV for a 26 cm<sup>3</sup> SrI<sub>2</sub>(Eu) crystal, which is equivalent to the performance obtained with Cerium-doped(More)
Rice (Oryza sativa L.) is one of the major food crops in many countries. As the cultivation of rice requires huge volume of water, long term use of arsenic contaminated groundwater for irrigation may result in the increase of arsenic concentration in the agricultural soil and eventually accumulation in rice plants. Thus a micro level study was conducted to(More)
In this study we report for the first time that Yb<sup>2+</sup> is an efficient and fast activator in iodide scintillator crystals. In both SrI<sub>2</sub> and CsBa<sub>2</sub><i>I</i><sub>5</sub>, Yb<sup>2+</sup> offers blue luminescence (&#x03BB; <sub>max</sub> = 414 nm), light yield greater than 50,000 Photons/MeV and sub-microsecond decay time. Results(More)
Europium-doped strontium iodide (SrI<inf>2</inf>:Eu) crystals are reported to be high light yield scintillator materials with good energy resolution, the best energy resolution of SrI<inf>2</inf>:Eu at 662 keV having reached 2.6%. To improve the crystals growth quality and to protect the crystals from hydration, it is practical to distinguish the pure(More)
A collaborative study of relative hygroscopicity of anhydrous halide scintillators grown at various laboratories is presented. We have developed a technique to evaluate moisture sensitivity of both raw materials and grown crystals, in which the moisture absorption rate is measured using a gravimetric analysis. Degradation of the scintillation performance(More)
Laser shock peening (LSP) is applied to potassium iodide (KI) crystals. A selective etching technique is used to reveal the dislocation structure induced by the LSP process, confirming that LSP multiplies and moves dislocations in an alkali halide. Increasing the crystal temperature during LSP is shown to eliminate cracking along cleavage-planes caused by(More)
The layered III-VI semiconductor Gallium Telluride has potential for room temperature gamma ray spectroscopy applications due to its band gap of 1.67 eV, and average atomic number of 45 : 31 (Ga) and 52 (Te). The physical properties of GaTe are highly anisotropic due to covalent bonding within the layer and van der Waals bonding between layers. This work(More)
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