منابع مشابه
Polarimetry with NICMOS
NICMOS cameras 1 and 2 (with ∼ 43 and ∼ 76 mas/pixel, respectively) each carry a set of three polarizing elements to provide high sensitivity observations of linearly polarized light. The polarizers are bandpass limited and provide diffraction-limited imaging in camera 1 at 0.8 1.3μm, and in camera 2 at 1.9-2.1μm. The NICMOS design specified the intra-camera primary axis angles of the polarizer...
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Due to the spin-orbit interaction, the electron scattering from the nucleus is sensitive to the spin orientation of that electron. This is used for polarimetry of electron beams in the Mott method. The spin-orbit interaction was also observed in bremsstrahlung. In this article we analyze its potential for polarimetry as an alternative to the Mott method. It can simultaneously measure all three ...
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ESPaDOnS is a new-generation cross-dispersed échelle spectropolarimeter, the commissioning phase of which is scheduled at the Canada-France-Hawaii Telescope (CFHT) for spring 2004. This instrument will provide full coverage of the optical domain (370 nm to 1,000 nm) in all polarization states (circular and linear) at a resolving power of about 70,000, with a peak efficiency of 20% (telescope an...
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We search for a spectral line produced by a dark matter (DM) particle with the mass in the range 40 keV < MDM < 14 MeV, decaying in the DM halo of the Milky Way, using a high-resolution spectrometer SPI on board of INTEGRAL satellite. To distinguish the DM decay line from numerous instrumental lines, found in the SPI background spectrum, we study the dependence of the intensity of the line sign...
متن کاملTau polarimetry with inclusive decays.
The spin asymmetry parameter Aτ characterizing the angular distribution of the total hadron momentum in the decay of a polarized tau can be calculated rigorously using perturbative QCD and the operator product expansion. Perturbative QCD corrections to the free quark result Aτ = 1/3 can be expressed as a power series in αs(Mτ ) and nonperturbative QCD corrections can be expanded systematically ...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2005
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921306007940