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U.S. Department of Energy
Office of Scientific and Technical Information

High efficiency photoionization detector

Patent ·
OSTI ID:7003985

A high efficiency photoionization detector is described using tetraaminoethylenes in a gaseous state having a low ionization potential and a relative photoionization cross section which closely matches the emission spectrum of xenon gas. Imaging proportional counters are also disclosed using the novel photoionization detector of the invention. The compound of greatest interest is TMAE which comprises tetrakis(dimethylamino)ethylene which has a measured ionization potential of 5.36 [+-] 0.02 eV, and a vapor pressure of 0.35 torr at 20 C. 6 figs.

DOE Contract Number:
W-7405-ENG-36
Assignee:
PTO; EDB-94-124855
Patent Number(s):
A; US 4429228
Application Number:
PPN: US 6-262833
OSTI ID:
7003985
Country of Publication:
United States
Language:
English