A CCD based detector for quick detection of pressure induced phase transitions |
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| Authors: | Amar Sinha Alka B Garg V Vijayakumar B K Godwal S K Sikka |
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| Institution: | High Pressure Physics Division , Solid State and Spectroscopy Group, Bhabha Atomic Research Centre , Trombay, Mumbai, 400 085, India |
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| Abstract: | Abstract A high sensitivity CCD based two dimensional angle dispersive X-ray are a detector has been developed for quick detection of pressure induced phase transitions for a laboratory X-ray source such as a rotating anode generator. The performance of this detector was tested by successfully carrying out powder X-ray diffraction measurements on element Pd, intermetallics AuIn2, AuGa2 and low Z scatterer adamantane (C10Hl6) at ambient conditions. Its utility for quick detection of phase transitions at high pressures with diamond anvil cell (DAC) is demonstrated by reproducing the known pressure induced structural phase transitions in RbI and KI. The importance of this detector system in search of unknown phase transitions has been established by observing new structural phase transitions in In0.25Sn0.75 and AuGa2. Various softwares have also been developed such as interactive location of centre of diffraction rings, radial integration and image enhancement to analyze data from this detector. |
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| Keywords: | Area detector X-ray diffraction High pressure Phase transition In0 25Sn0 75 alloy |
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