102 research outputs found
Novel Moessbauer experiment in a rotating system and the extra-energy shift between emission and absorption lines
We present the results of a novel Mossbauer experiment in a rotating system,
implemented recently in Istanbul University, which yields the coefficient
k=0.69+/-0.02 within the frame of the expression for the relative energy shift
between emission and absorption lines dE/E=ku2/c2. This result turned out to be
in a quantitative agreement with an experiment achieved earlier on the subject
matter (A.L. Kholmetskii et al. 2009 Phys. Scr. 79 065007), and once again
strongly pointed to the inequality k>0.5, revealed originally in (A.L.
Kholmetskii et al. 2008 Phys. Scr. 77, 035302 (2008)) via the re-analysis of
Kundig experiment (W. Kundig. Phys. Rev. 129, 2371 (1963)). A possible
explanation of the deviation of the coefficient k from the relativistic
prediction k=0.5 is discussed.Comment: 21 pages, 8 figures, 3 table
Progress in PbWO scintillating crystal
The latest results in improvement of scintillator properties with Nb doping of PbWO4 crystal are presented. The effects on the basic parameters of the crystal, such as radiation hardness, decay time and light yield, are evaluated.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
Technical Design Report for the PANDA Solenoid and Dipole Spectrometer Magnets
This document is the Technical Design Report covering the two large
spectrometer magnets of the PANDA detector set-up. It shows the conceptual
design of the magnets and their anticipated performance. It precedes the tender
and procurement of the magnets and, hence, is subject to possible modifications
arising during this process.Comment: 10 pages, 14MB, accepted by FAIR STI in May 2009, editors: Inti
Lehmann (chair), Andrea Bersani, Yuri Lobanov, Jost Luehning, Jerzy Smyrski,
Technical Coordiantor: Lars Schmitt, Bernd Lewandowski (deputy),
Spokespersons: Ulrich Wiedner, Paola Gianotti (deputy
Radiation hardness qualification of PbWO4 scintillation crystals for the CMS Electromagnetic Calorimeter
This is the Pre-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2010 IOPEnsuring the radiation hardness of PbWO4 crystals was one of the main priorities during the construction of the electromagnetic calorimeter of the CMS experiment at CERN. The production on an industrial scale of radiation hard crystals and their certification over a period of several years represented a difficult challenge both for CMS and for the crystal suppliers. The present article reviews the related scientific and technological problems encountered
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