Showing papers by "Karsten Danzmann published in 1985"
TL;DR: In this article, the VUV line emission of a high-current DC hollow cathode was investigated in the wavelength region 10 nm to 100 nm and the radiance in the Al IV lines at 13 nm and 16 nm and in the He II Lyman-series was determined by a comparison with the spectral concentration of radiant intensity of the synchrotron radiation emitted by the electron storage ring BESSY.
Abstract: The VUV line emission of a high-current DC hollow cathode was investigated in the wavelength region 10 nm to 100 nm. Spectra of quadruply ionised atoms could be observed. The radiance in the Al IV lines at 13 nm and 16 nm and in the He II Lyman-series was determined by a comparison with the spectral concentration of radiant intensity of the synchrotron radiation emitted by the electron storage ring BESSY. The authors found the radiance of the lines to be reproducible within +or-25%.
17 citations
TL;DR: In charge-transfer collisions of 4-keV recoil ions with Na, 434-nm photons emitted in the n-to-8 transition are observed, finding this radiation to be strongly polarized, with a degree of polarization P=0.02.
Abstract: In charge-transfer collisions of 4-keV ${\mathrm{Ne}}^{8+}$ recoil ions with Na, we have observed 434-nm photons emitted in the $n=9 \mathrm{to} 8$ transition in ${\mathrm{Ne}}^{7+}$. We find this radiation to be strongly polarized, with a degree of polarization $P=0.32\ifmmode\pm\else\textpm\fi{}0.02$. This result is in accord with a recent calculation of Salin indicating that electron capture into slow, highly charged ions preferentially populates the $m=0, \ifmmode\pm\else\textpm\fi{}1$ magnetic substates.
15 citations