1,721,521 research outputs found
Comment on the letter Photoionisation cross section and spin polarisation of photoelectrons from thallium by N.A. Cherenkov
Full text linkHeinzmann U, Kessler J. Comment on the letter Photoionisation cross section and spin polarisation of photoelectrons from thallium by N.A. Cherenkov. Journal of Physics B: Atomic, Molecular and Optical Physics. 1978;11(8):L265-L266
Wavelength dependence of polarisation of photoelectrons ejected by unpolarised VUV radiation from argon and krypton atoms
Full text linkHeinzmann U, Schönhense G, Kessler J. Wavelength dependence of polarisation of photoelectrons ejected by unpolarised VUV radiation from argon and krypton atoms. Journal of Physics B: Atomic, Molecular and Optical Physics. 1980;13(5):L153-L156
Kessler J. et Chambraud A. — La météo de la France.
No full textRougier Henri. Kessler J. et Chambraud A. — La météo de la France. . In: Revue de géographie alpine, tome 74, n°3, 1986. pp. 346-347
Polarised photoelectrons from silver atoms
Full text linkHeinzmann U, Wolcke A, Kessler J. Polarised photoelectrons from silver atoms. Journal of Physics B: Atomic, Molecular and Optical Physics. 1980;13(16):3149-3156.The polarisation of photoelectrons ejected by circularly polarised VUV radiation from silver atoms has been measured in the wavelength range between 150 and 160 nm. Autoionisation states give rise to pronounced resonance structures in the photoionisation cross section and in the photoelectron polarisation. The measured polarisation yields direct information on the angular momentum quantum numbers J of the autoionising states and on extrema of the cross section resonances
Polarised photoelectrons produced at xenon atoms by circularly polarised synchrotron radiation
Full text linkHeinzmann U, Schäfers F, Thimm K, Wolcke A, Kessler J. Polarised photoelectrons produced at xenon atoms by circularly polarised synchrotron radiation. Journal of Physics B: Atomic, Molecular and Optical Physics. 1979;12(22):L679-L683.Circularly polarised synchrotron radiation is used for producing spin polarised photoelectrons at xenon atoms. After a brief description of the apparatus the dependence of the electron polarisation on the photo energy is presented and compared with a theoretical prediction
Angle- and spin-resolved photoelectron spectroscopy of the Hg 5d10 subshell
Full text linkSchönhense G, Schäfers F, Heinzmann U, Kessler J. Angle- and spin-resolved photoelectron spectroscopy of the Hg 5d10 subshell. Zeitschrift für Physik A: Hadrons and Nuclei. 1982;304(1):31-40.Parameters describing electron spin polarization in Hg 5d10 subshell photoionization have been measured at rare-gas resonance wavelengths between 73.59 nm and 30.38 nm. The spin parameters as well as asymmetry parameters beta of a recent measurement are discussed in comparison with both nonrelativistic and relativistic ab initio calculations of several authors. The importance of many-electron correlations and spin-orbit coupling effects is considered. We would like to express our thanks to F. Combet Farnoux, N. Cherepkov, W. Johnson and S. Manson for useful correspondence as well as for the communication of unpublished results. This work was supported by the DFG and BMFT. One of us (G.S.) wishes to thank the Studienstiftung des Deutschen Volkes for financial support
Evidence for New Minima in Photoionization Cross Section Obtained by Spin-Polarization Measurements
Full text linkHeinzmann U, Heuer H, Kessler J. Evidence for New Minima in Photoionization Cross Section Obtained by Spin-Polarization Measurements. Physical review letters. 1976;36(24):1444-1447
Spin-Polarized Electrons from Autoionizing Transitions in Thallium (Erratum)
No full textHeinzmann U, Heuer H, Kessler J. Spin-Polarized Electrons from Autoionizing Transitions in Thallium (Erratum). Physical Review Letters. 1975;34(11):710-710
Longitudinal reference ranges for ductus venosus flow velocities and waveform indices
Full text linkOBJECTIVES: Serial Doppler measurements of the ductus venosus are used increasingly for monitoring fetuses at risk of hemodynamic compromise, but existing reference ranges are based on cross-sectional studies and thus are less suitable for comparison with serial measurements. We aimed to establish longitudinal reference ranges for ductus venosus flow velocities and waveform indices and to provide the necessary terms for calculating conditional reference ranges for serial measurements. METHODS: This was a longitudinal study of 160 low-risk pregnancies. Pulsed Doppler ultrasound was used to record ductus venosus blood flow velocities at 4-week intervals from 20-22 weeks of gestation onwards. RESULTS: With a success rate of 93%, 547 measurements (four or five in each fetus) were used to establish reference ranges. The time-averaged maximum velocity was 50 cm/s at 21 weeks of gestation, increased to 60 cm/s at 32 weeks, and remained so until term. Similarly, the peak systolic velocity increased from 59 cm/s at 21 weeks to 71 cm/s at 31 weeks and remained so until term. The end-diastolic velocity showed a continuous increase from 31 cm/s at 21 weeks to 43 cm/s at 40 weeks. The pulsatility index for veins decreased from 0.57 at 21 weeks to 0.44 at 40 weeks. When conditioned by a previous measurement, the reference ranges for the next observation became narrower and commonly shifted compared with those of the entire population. CONCLUSION: The new longitudinal reference ranges presented here reflect the development of the ductus venosus flow velocities and velocity indices and are thus appropriate for serial measurements, particularly if conditional terms are include
Measurements of Fano-effect at Xenon atoms using circularly polarized synchrotron radiation
No full textHeinzmann U, Schäfers F, Thimm K, Wolcke A, Kessler J. Measurements of Fano-effect at Xenon atoms using circularly polarized synchrotron radiation. Europ. Synchr. Radiat. News. 1979:3
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