Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-05-22
Nucl.Instrum.Meth. A440 (2000) 57-85
Physics
High Energy Physics
High Energy Physics - Experiment
Elsevier LaTeX, 63 pages in e-print format, 25 PostScript Figures and 4 Tables, also available via anonymous ftp at ftp://he
Scientific paper
10.1016/S0168-9002(99)00886-4
Scintillation properties of pure CsI crystals used in the shower calorimeter being built for precise determination of the pi+ -> pi0 e+ nu decay rate are reported. Seventy-four individual crystals, polished and wrapped in Teflon foil, were examined in a multiwire drift chamber system specially designed for transmission cosmic muon tomography. Critical elements of the apparatus and reconstruction algorithms enabling measurement of spatial detector optical nonuniformities are described. Results are compared with a Monte Carlo simulation of the light response of an ideal detector. The deduced optical nonuniformity contributions to the FWHM energy resolution of the PIBETA CsI calorimeter for the pi+ -> e+ nu 69.8 MeV positrons and the monoenergetic 70.8 MeV photons were 2.7% and 3.7%, respectively. The upper limit of optical nonuniformity correction to the 69.8 MeV positron low-energy tail between 5 MeV and 55 MeV was +0.2%, as opposed to the +0.3% tail contribution for the photon of the equivalent total energy. Imposing the 5 MeV calorimeter veto cut to suppress the electromagnetic losses, GEANT-evaluated positron and photon lineshape tail fractions summed over all above-threshold ADCs were found to be 2.36+-0.05(stat)+-0.20(sys)% and 4.68+-0.07(stat)+-0.20(sys)%, respectively.
Assamagan Ketevi A.
Br"onnimann Ch.
Fl"ugel Th.
Frlez Emil
Krause Benjamin
No associations
LandOfFree
Cosmic muon tomography of pure cesium iodide calorimeter crystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmic muon tomography of pure cesium iodide calorimeter crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic muon tomography of pure cesium iodide calorimeter crystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-296604