Room temperature calibrations of the interstitial oxygen infrared absorption bands in single-ciwstal silicon at 1106 and 515 cm-', using the technique of gamma photon activation analysis are reported. Attempts have been made to assess the accuracy of both techniques. An integrated area method, appropriate to device quality wafers, is reported in addition to the conventional peak height calibration at 1106 cm -~. At 30~ the calibration constant for the peak height of the 1106 cm -1 band is 2.61 +/-0.3 x 10 '7 at.-cm-~; the integrated area calibration of the 1106 cm-' band at 30~ is 1.83 +/-0.2 • 10 TM at.-cm -~. The integrated area calibration constant for the 515 cm-' band at 30~ is 1.06 +/-0.1 • 10 '7 at.-cm -I. Temperature coefficients of the calibration constants have been determined close to spectrometer ambient.
1 Nine volunteers ingested high levels of lead in beer over a 28-d period. The increase in blood lead varied by a factor of about two. There was a similar two-fold variability in the whole-body uptake (mean 14%) of a single oral dose of the short-lived tracer 203Pb. 2 The average elevations led to estimates of the potential increment from consumption of alcoholic beverages which accord broadly with epidemiological observation and which, if relevant to intakes of lead in table wine, raise the possibility of considerably elevated levels in the blood of avid consumers. 3 Rate constants inferred for removal of stable lead from blood were lower than reported following intake of the tracer, reflecting feedback of lead from other compartments.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.