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Start Over Author "Wille, H." Journal physical review letters
9 results on '"Wille, H."'

3. X-Ray Resonant Photoexcitation: Linewidths and Energies ofKαTransitions in Highly Charged Fe Ions

Author

Rudolph, J. K., primary, Bernitt, S., additional, Epp, S. W., additional, Steinbrügge, R., additional, Beilmann, C., additional, Brown, G. V., additional, Eberle, S., additional, Graf, A., additional, Harman, Z., additional, Hell, N., additional, Leutenegger, M., additional, Müller, A., additional, Schlage, K., additional, Wille, H.-C., additional, Yavaş, H., additional, Ullrich, J., additional, and Crespo López-Urrutia, J. R., additional

Published
2013
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6. γ-Ray Wavelength Standard for Atomic Scales

Author

Shvyd'ko, Yu. V., primary, Lerche, M., additional, Jäschke, J., additional, Lucht, M., additional, Gerdau, E., additional, Gerken, M., additional, Rüter, H. D., additional, Wille, H.-C., additional, Becker, P., additional, Alp, E. E., additional, Sturhahn, W., additional, Sutter, J., additional, and Toellner, T. S., additional

Published
2000
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7. X-Ray Resonant Photoexcitation: Linewidths and Energies of Kα Transitions in Highly Charged Fe Ions.

Author

Rudolph, J. K., Bernitt, S., Epp, S. W., Steinbrügge, R., Beilmann, C., Brown, G. V., Eberle, S., Graf, A., Harman, Z., Hell, N., Leutenegger, M., Müller, A., Schlage, K., Wille, H.-C., Yavaş, H., Ullrich, J., and Crespo López-Urrutia, J. R.

Subjects
*PHOTOEXCITATION, *X-rays, *IRON ions, *LIGHT absorption, *FLUORESCENCE, *MONOCHROMATIC light, *X-ray binaries, *GALACTIC nuclei
Abstract

Photoabsorption by and fluorescence of the Kα transitions in highly charged iron ions are essential mechanisms for x-ray radiation transfer in astrophysical environments. We study photoabsorption due to the main Kα transitions in highly charged iron ions from heliumlike to fluorinelike (Fe24+ to Fe17+) using monochromatic x rays around 6.6 keV at the PETRA III synchrotron photon source. Natural linewidths were determined with hitherto unattained accuracy. The observed transitions are of particular interest for the understanding of photoexcited plasmas found in x-ray binary stars and active galactic nuclei. [ABSTRACT FROM AUTHOR]

Published
2013
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8. X-ray interferometry with microelectronvolt resolution.

Author

Shvyd'ko YV, Lerche M, Wille HC, Gerdau E, Lucht M, Rüter HD, Alp EE, and Khachatryan R

Abstract

We demonstrate an interferometer for hard x rays with two back-reflecting sapphire crystal mirrors--a prototype x-ray Fabry-Pérot interferometer. A finesse of 15 and 0.76 mu eV broad Fabry-Pérot transmission resonances are measured by the time response of the interferometer. Interference patterns are observed directly in spectral dependences of reflectivity.

Published
2003
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9. gamma-Ray wavelength standard for atomic scales.

Author

Shvyd'ko YV, Lerche M, Jäschke J, Lucht M, Gerdau E, Gerken M, Rüter HD, Wille HC, Becker P, Alp EE, Sturhahn W, Sutter J, and Toellner TS

Abstract

The wavelength of the 57Fe Mössbauer radiation is measured with a relative uncertainty of 0.19 ppm by using almost exact Bragg backscattering from a reference silicon crystal. Its value is determined as lambda(M) = 0.860 254 74(16)x10(-10) m. The corresponding Mössbauer photon energy is E(M) = 14 412.497(3) eV. The wavelength of the 57Fe Mössbauer radiation is easily reproducible with an accuracy of at least 10(-11)lambda(M) and could be used as a length standard of atomic dimensions.

Published
2000
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