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Tagging efficiency for an uncollimated photon beam

Technical Report:

Abstract

In the present experiment the photon beam collimator was removed from the tagging spectrometer, so the fraction of the tagged-photon flux that was incident on the face of the target (circular, diameter = 70 mm) and the face of the Cherenkov detector (square, side length = 100 mm) is different, so that a correction for the different boundary conditions of the target and Cherenkov detectors is required. The report provides a prescription for evaluating the tagging efficiency of the uncollimated and off-axis photon beam, allowing tagging efficiences of {approx} 75% to be determined with an accuracy of about 1%. For a collimated beam, the tagging efficiency is usually about 50%. The present analysis is not sensitive to inaccuracies in the magnitude of the theoretical expression for the bremsstrahlung cross sections. 6 refs., 5 figs.
Authors:
Eden, J A; O`Keefe, G J; Rassool, R P; [1]  Suda, T; Nomura, I; Yokokawa, J [2] 
  1. Melbourne Univ., Parkville (Australia). School of Physics
  2. Tohoku Univ., Sendai (Japan). Lab. of Nuclear Science; and others
Publication Date:
Dec 31, 1991
Product Type:
Technical Report
Report Number:
UM-P-91/11
Reference Number:
SCA: 663410; PA: AIX-23:015559; SN: 92000647155
Resource Relation:
Other Information: PBD: [1991]
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COLLIMATORS; EFFICIENCY; TAGGED PHOTON METHOD; PHOTONUCLEAR REACTIONS; BEAM OPTICS; BOUNDARY CONDITIONS; CORRECTIONS; EXPERIMENTAL DATA; PHOTON BEAMS; 663410; PHOTONUCLEAR REACTIONS AND PHOTON SCATTERING
Sponsoring Organizations:
Australian Research Council, Canberra, ACT (Australia); Department of Industry, Technology and Commerce, Canberra, ACT (Australia)
OSTI ID:
10115340
Research Organizations:
Melbourne Univ., Parkville, VIC (Australia). School of Physics
Country of Origin:
Australia
Language:
English
Other Identifying Numbers:
Other: ON: DE92615317; TRN: AU9112334015559
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
11 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Eden, J A, O`Keefe, G J, Rassool, R P, Suda, T, Nomura, I, and Yokokawa, J. Tagging efficiency for an uncollimated photon beam. Australia: N. p., 1991. Web.
Eden, J A, O`Keefe, G J, Rassool, R P, Suda, T, Nomura, I, & Yokokawa, J. Tagging efficiency for an uncollimated photon beam. Australia.
Eden, J A, O`Keefe, G J, Rassool, R P, Suda, T, Nomura, I, and Yokokawa, J. 1991. "Tagging efficiency for an uncollimated photon beam." Australia.
@misc{etde_10115340,
title = {Tagging efficiency for an uncollimated photon beam}
author = {Eden, J A, O`Keefe, G J, Rassool, R P, Suda, T, Nomura, I, and Yokokawa, J}
abstractNote = {In the present experiment the photon beam collimator was removed from the tagging spectrometer, so the fraction of the tagged-photon flux that was incident on the face of the target (circular, diameter = 70 mm) and the face of the Cherenkov detector (square, side length = 100 mm) is different, so that a correction for the different boundary conditions of the target and Cherenkov detectors is required. The report provides a prescription for evaluating the tagging efficiency of the uncollimated and off-axis photon beam, allowing tagging efficiences of {approx} 75% to be determined with an accuracy of about 1%. For a collimated beam, the tagging efficiency is usually about 50%. The present analysis is not sensitive to inaccuracies in the magnitude of the theoretical expression for the bremsstrahlung cross sections. 6 refs., 5 figs.}
place = {Australia}
year = {1991}
month = {Dec}
}