Location of Repository

ΠΑΡΑΓΩΓΗ ΜΟΝΟΧΡΩΜΑΤΙΚΩΝ ΔΕΣΜΩΝ ΑΚΤΙΝΩΝ Χ ΑΠΟ ΠΡΩΤΟΝΙΑ ΚΑΙ ΧΡΗΣΗ ΤΟΥΣ ΣΕ ΑΝΑΛΥΤΙΚΕΣ ΕΦΑΡΜΟΓΕΣ

By ΑΝΔΡΕΑΣ-ΓΕΡΜΑΝΟΣ ΚΑΡΥΔΑΣ

Abstract

THE POSSIBILITY OF USING PROTONS WITH ENERGY OF A FEW MEV FOR THE PRODUCTION OF MONOENERGETIC X-RAY BEAMS WITH APPLICATION TO THE X-RAY FLUORESCENCE ANALYSIS (XRF), WAS INVESTIGATED THEORETICALLY AND EXPERIMENTALLY. THE YIELD OF THE CHARACTERISTIC X-RAYS, PRODUCED WHEN A PURE TARGET IS BOMBARDED BY PROTONS, WAS CALCULATED (AT REFLECTION OR TRANSMISSION GEOMETRY) AND ITS DEPENDENCE ON VARIOUS EXPERIMENTAL PARAMETERS (PROTON ENERGY, ANGLE OF INCIDENCE) WAS STUDIED. AN EXPERIMENTAL ARRANGEMENT WITH SMALL INTERCOMPONENT DISTANCES (SOURCE-SAMPLE-DETECTOR) AND SUITABLE FOR SAMPLE IRRADIATION AND DETECTION OF THE FLUORESCENT X-RAYS IN VACUUM, WAS CONSTRUCTED. THE BACKGROUND PRODUCED IN THE SI(LI) DETECTOR BY THE Γ-RAYS, ORIGINATING FROM THE PRIMARY TARGET, WAS STUDIED AS A FUNCTION OF THE PROTON ENERGY, FOR THE PURPOSE OF FINDING AN OPTIMUM ENERGY. FOR CALIBRATION PURPOSES, A NUMBER OF THIN TARGETS WERE MADE AND THEIR THICKNESS WAS MEASURED EMPLOYING INDEPENDENT METHODS. ALSO, IN ORDER TO IMPROVE THE ACCURACY OF THE CALIBRATION PROCEDURE, THE EXACT THEORETICAL CALCULATION OF THE ENHANCEMENT OF THE XRF INTENSITY, DUE TO THE SCATTERING INSIDE THE SAMPLE OF EITHER THE EXCITING OR THE CHARACTERISTIC RADIATION, WAS PERFORMED. A SOFTWARE PROGRAM FOR THE QUANTITATIVE ANALYSIS OF HOMOGENEOUS SAMPLES WAS DEVELOPED,WHICH TAKE INTO ACCOUNT ALL SECOND ORDER CORRECTIONS TO THE XRF INTENSITY AND ALSO HAVING THE ADVANTAGE OF USING SIMULTANEOUSLY DATA FROM MANY X-RAY SOURCES. (ABSTRACT TRUNCATED)

Topics: ANALYTICAL APPLICATIONS, MONOENERGETIC X-RAY BEAMS, PIXRF, IXX, XSQR, PROTON BEAMS, X-ray fluorescence (XRF), ΑΝΑΛΥΤΙΚΕΣ ΕΦΑΡΜΟΓΕΣ, ΔΕΣΜΗ ΠΡΩΤΟΝΙΩΝ, ΜΟΝΟΕΝΕΡΓΕΙΑΚΕΣ ΔΕΣΜΕΣ ΑΚΤΙΝΩΝ Χ, Φθορισμός ακτίνων-Χ
Publisher: National Technical University of Athens (NTUA)
Year: 1994
DOI identifier: 10.12681/eadd/3032
OAI identifier:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://hdl.handle.net/10442/he... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.