Measured conversion efficiencies of P45, paraterphenyl, tetraphenyl butadiene, and sodium salicylate phosphors in the soft-x-ray wavelength range

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Applied Optics; (United States)

DOI:https://doi.org/10.1364/AO.33.003595· OSTI ID:7113684

Regan, S P; Huang, L K; May, M J; Moos, H W ^[1]; Stutman, D; Kovnovich, S; Finkenthal, M ^[2]

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1. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218 (United States)
2. Racah Institute of Physics, The Hebrew University, Jerusalem (Israel)

The measured conversion efficiencies at 9.89, 23.6, 44.7, and 160 A of P45 phosphor screens, as well as those of paraterphenyl, tetraphenyl butadiene, and sodium salicylate at 9.89, 44.7, and 67.6 A, are presented. The conversion efficiency is defined as the ratio of photoelectrons ejected from the photocathode of a visible detector, which are excited by the scintillated photons that are emitted from the phosphor in a solid angle of 2[pi], to the number of soft-x-ray photons incident on the phosphor. The effect of the phosphor's thickness on the conversion efficiency was studied. The P45 phosphor converts the soft-x-ray photon (10--200 A) into an order of magnitude more visible photons than the low-[ital Z] phosphors. The P45 phosphor screen used in conjunction with a photomultiplier tube offers a soft-x-ray photodetector with a conversion efficiency that ranges from 0.5 at 160 A to 12 at 9.89 A and a high electronic gain.

• DOE Contract Number: FG02-86ER53214
• OSTI ID: 7113684
• Journal Information: Applied Optics; (United States), Vol. 33:16; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
ORGANIC CRYSTAL PHOSPHORS
EFFICIENCY
PHOTODETECTORS
SOFT X RADIATION
RADIATION DETECTION
CALIBRATION
PHOTOMULTIPLIERS
PLASMA DIAGNOSTICS
SCREENS
SODIUM COMPOUNDS
TERPHENYL-PARA
ALKALI METAL COMPOUNDS
AROMATICS
DETECTION
ELECTROMAGNETIC RADIATION
HYDROCARBONS
IONIZING RADIATIONS
ORGANIC COMPOUNDS
PHOSPHORS
PHOTOTUBES
POLYPHENYLS
RADIATIONS
TERPHENYLS
X RADIATION
440600* - Optical Instrumentation- (1990-)