Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2742802
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Intense Ar K alpha x ray with very little continuum background has been generated using a dense Ar gas irradiated with an intense femtosecond laser, with the measured flux of 1.2x10(3) photons/mrad(2)/pulse. This compact quasimonochromatic x-ray source, with a source size of only 12 mu m, has been applied to x-ray radiographic imaging of a biological specimen, resulting in high-resolution, high quality phase-contrast images. Correlation between this intense K alpha emission with the laser channeling in the Ar gas is discussed. (c) 2007 American Institute of Physics.
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