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Träfflista för sökning "WFRF:(Bock F.) srt2:(2000-2004)"

Sökning: WFRF:(Bock F.) > (2000-2004)

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1.
  • Dutz, H, et al. (författare)
  • Experimental check of the Gerasimov-Drell-Hearn sum rule for H-1
  • 2004
  • Ingår i: Physical Review Letters. - 1079-7114. ; 93:3
  • Tidskriftsartikel (refereegranskat)abstract
    • For the first time we checked the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the proton experimentally in the photon energy range from 0.2-2.9 GeV with the tagged photon facilities at MAMI (Mainz) and ELSA (Bonn). New data of the doubly polarized total cross section difference are presented in the energy range from 1.6 to 2.9 GeV. The contribution to the GDH integral from 0.2-2.9 GeV yields [254+/-5(stat)+/-12(syst)] mub with negative contributions in the Regge regime at photon energies above 2.1 GeV. This trend supports the validity of the GDH sum rule.
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2.
  • Dutz, H, et al. (författare)
  • First measurement of the Gerasimov-Drell-Hearn sum rule for H-1 from 0.7 to 1.8 GeV at ELSA
  • 2003
  • Ingår i: Physical Review Letters. - 1079-7114. ; 91:19: 192001
  • Tidskriftsartikel (refereegranskat)abstract
    • To verify the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the first time experimentally, we measured the helicity dependent total photoabsorption cross section with circularly polarized real photons and longitudinally polarized nucleons in the photon energy range 0.68-1.82 GeV with the tagged photon facility at ELSA. The experiment was carried out with a 4pi detection system, a circularly polarized tagged photon beam, and a frozen spin polarized proton target. The contribution to the GDH sum rule in this photon energy range is [49.9+/-2.4(stat)+/-2.2(syst)] mub.
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3.
  • Jakubowska, Katarzyna, et al. (författare)
  • Motional Stark Effect Diagnostic on TEXTOR
  • 2004
  • Ingår i: Review of Scientific Instruments. - : AIP Publishing. - 0034-6748 .- 1089-7623. ; 75:10, s. 3475-3477
  • Tidskriftsartikel (refereegranskat)abstract
    • A motional Stark effect diagnostic at the tokamak TEXTOR has been constructed and brought recently into operation. In contrast to diagnostics used on other tokamaks, this diagnostic reveals the direction of the magnetic field from the intensity ratio of the pi and sigma components of the emitted Balmer-alpha and not from a polarization measurement of a single line. Moreover, the complete spectrum is measured which allows determining the radial position of the measurement, and in principle the radial electric field.
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  • Resultat 1-3 av 3

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