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Media type:
E-Article
Title:
Photon detection with n-propanol and C2H6O isomers
Contributor:
Lipton-Duffin, J. A.;
Mark, A. G.;
McLean, A. B.
imprint:
AIP Publishing, 2002
Published in:Review of Scientific Instruments
Language:
English
DOI:
10.1063/1.1499536
ISSN:
0034-6748;
1089-7623
Origination:
Footnote:
Description:
<jats:p>We demonstrate that a Geiger–Müller-type bandpass photon detector, suitable for inverse photoemission experiments, can be constructed from a MgF2 entrance window that has a high-energy transmission threshold of 10.97 eV, and ethanol, a detection gas with an ionization potential of 10.48 eV. The photon detector has a mean detection energy of ℏωd=(10.89±0.07) eV and a bandpass of Δℏωd=(0.37±0.05) eV. A photon detector can also be constructed from n-propanol/MgF2 with a mean detection energy of ℏωd=(10.76±0.07) eV and a bandpass Δℏωd=(0.41±0.05) eV. These two new detection gas/window combinations have a higher detection energy and a narrower bandpass than the dimethylether/MgF2 detector [Δℏωd=(0.71±0.04) eV and ℏωd=10.60 eV]. Since all three detectors utilize a MgF2 entrance window, the photon bandpass can be changed straightforwardly by changing the detection gas. For systems that can be easily damaged by electron beams, having the freedom to open up the detector bandpass is an advantage because it can reduce the total electron exposure time.</jats:p>