TY  - JOUR
ID  - myais987
UR  - http://eprints.ictp.it/222/; http://eprints.ictp.it/222/01/JFMv25-87.pdf
IS  - 3 & 4
A1  - Mongkolnavin, R.
A1  - Ngamrungroj, D.
A1  - Leeviriyalard, C.
A1  - Wong, C. S.
Y1  - 2004///
N2  - A preliminary investigation on effect of X-ray on colorless synthetic corundum has been carried out. The X- ay used was generated from a small 3 kJ UNU/ICTP Plasma Focus device. The X-ray produced by the focusing plasma was measured by using four channels PIN diode spectrometer. The spectral content of the X-ray and the plasma electron temperature were obtained by a ratio method. The electron temperature was deduced to be 1.9 keV. The color of the corundum changed to yellow-brown after an exposure with the X-ray. The intensity of the color varied with the number of focusing and non-focusing shot applied to the samples. UV-VIS-NIR Spectrometer was used to test the photo-absorption of the treated corundum. The experimental results show that the color change is not caused by a known Rayleigh?s scattering process. This color change is non-permanent and can be reverted to its initial state by thermal annealing process. 
PB  - Malaysian Institute of Physics (IFM)
JF  - Jurnal Fizik Malaysia
VL  - 25
KW  - Plasma focus application; x-rays
KW  -  Corundum
KW  -  physics
SN  - 0128-0333 
TI  - Effect of X-ray from a small plasma focus on colorless synthetic corundum
SP  - 87
AV  - none
EP  - 91
ER  -