A Measurement of Photon Production in Electron Avalanches in CF4

Kaboth, A.; Monroe, J.; Ahlen, S.; Dujmic, D.; Henderson, S.; Kohse, G.; Lanza, R.; Lewandowska, M.; Roccaro, A.; Sciolla, G.; Skvorodnev, N.; Tomita, H.; Vanderspek, R.; Wellenstein, H.; Yamamoto, R.; Fisher, P.

A Measurement of Photon Production in Electron Avalanches in CF4

Authors

Description

This paper presents a measurement of the ratio of photon to electron production and the scintillation spectrum in a popular gas for time pro jection chambers, carbon tetrafluoride (CF4), over the range of 200 to 800 nm; the ratio is measured to be 0.34+/-0.04. This result is of particular importance for a new generation of dark matter time projection chambers with directional sensitivity which use CF4 as a fill gas.
19 pages, including appendix. 8 figures