The radionuclide (113)Sn is a quasi-monoenergetic gamma emitter often used in the efficiency calibration of gamma spectrometers in the energy region around 390keV. This paper presents the results of the standardization of this radionuclide by three methods: integral (4π-γ) counting with a well-type NaI(Tl) detector, liquid scintillation counting applying the CIEMAT-NIST method and 4π coincidence counting (conversion electron-X) with a digital coincidence system.
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Standardization of Sn-113.
Appl Radiat Isot
May 2014
Laboratorio de Metrología de Radiaciones Ionizantes, CIEMAT, Spain.
The radionuclide (113)Sn is a quasi-monoenergetic gamma emitter often used in the efficiency calibration of gamma spectrometers in the energy region around 390keV. This paper presents the results of the standardization of this radionuclide by three methods: integral (4π-γ) counting with a well-type NaI(Tl) detector, liquid scintillation counting applying the CIEMAT-NIST method and 4π coincidence counting (conversion electron-X) with a digital coincidence system.
View Article and Find Full Text PDFThe effects of enflurane on ocular blood flow.
J Ocul Pharmacol
December 1993
Department of Anesthesia and Critical Care, University of Chicago, Illinois.
Although general anesthesia is frequently chosen for eye surgery or experimental studies of ocular blood flow, there are few data available describing its effects on ocular blood flow. In a previous study in cats, we reported that enflurane produced significant increases in preretinal oxygen tension, indicating an increase in oxygen availability in the retina. To examine whether this effect was due to an increase in retinal or choroidal blood flow, we used radioactively labeled 15 microns microspheres of Ce 141, Sn 113, Ru 103, or Nb 95, to measure ocular blood flow in cats during enflurane anesthesia.
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