Water window
Thewater windowis a region of theelectromagnetic spectrumin whichwateris transparent[clarification needed]tosoft x-rays.The window extends from the K-absorption edgeof carbon at 282 eV (68 PHz, 4.40 nm wavelength) to theK-edgeof oxygen at 533 eV (129 PHz, 2.33 nm wavelength). Water is transparent to these X-rays, but carbon and itsorganic compoundsare absorbing. These wavelengths could be used in anx-ray microscopefor viewing living specimens.[1][2]This is technically challenging because few if any viablelensmaterials are available aboveextreme ultraviolet.
See also
[edit]References
[edit]- ^De Stasio, G.; Gilbert, B.; Nelson, T.; Hansen, R.; Wallace, J.; Mercanti, D.; Capozi, M.; Baudat, P. A.; Perfetti, P.; Margaritondo, G.; Tonner, B. P. (January 2000)."Feasibility tests of transmission x-ray photoelectron emission microscopy of wet samples"(PDF).Review of Scientific Instruments.71:11–14.Bibcode:2000RScI...71...11D.doi:10.1063/1.1150151.Archived fromthe original(PDF)on 2017-08-13.
- ^Spielmann, C.; Burnett, N. H.; Sartania, S.; Koppitsch, R.; Schnürer, M.; Kan, C.; Lenzner, M.; Wobrauschek, P.; Krausz, F. (24 Oct 1997). "Generation of Coherent X-rays in the Water Window Using 5-Femtosecond Laser Pulses".Science.278(5338): 661–664.Bibcode:1997Sci...278..661S.doi:10.1126/science.278.5338.661.
- Sebastian Wachsmann-Hogiu; Alexander J Annala; Daniel L Farkas (2004). Colin E. Webb and Julian D. C. Jones (ed.).Handbook of Laser Technology and Applications: Applications.IOP Publishing. p. 2138.ISBN978-0-7503-0966-0.