A prototype spectrometer for XRF ″in situ″ analysis using a 20 mm**2 gas cooled Si(Li) detector (with FWHM equals 220 eV for Mn-K// alpha rays) is presented. The spectrometer is capable of performing multielement analyses on a small sample area with good sensitivity. The detector cooling system is obtained through a miniature Joule-Thomson liquifier fed with argon or nitrogen gas contained in a standard pressure bottle. The lack of the liquid N//2 Dewar makes the spectrometer a compact and portable instrument, still maintaining the characteristics of a laboratory instrument. The applicability of the prototype for measurements of artistic and mineralogical samples is surveyed.
A PROTOTYPE SPECTROMETER FOR XRF ″IN SITU″ ANALYSIS USING A GAS COOLED Si(Li) DETECTOR.
FENZI, Alberto;
1979-01-01
Abstract
A prototype spectrometer for XRF ″in situ″ analysis using a 20 mm**2 gas cooled Si(Li) detector (with FWHM equals 220 eV for Mn-K// alpha rays) is presented. The spectrometer is capable of performing multielement analyses on a small sample area with good sensitivity. The detector cooling system is obtained through a miniature Joule-Thomson liquifier fed with argon or nitrogen gas contained in a standard pressure bottle. The lack of the liquid N//2 Dewar makes the spectrometer a compact and portable instrument, still maintaining the characteristics of a laboratory instrument. The applicability of the prototype for measurements of artistic and mineralogical samples is surveyed.
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