Stripping of X-ray bremsstrahlung spectra up to 300 kVp on a desk type computer.

The direct result of a spectrometric measurement is a pulse height distribution. In the energy region up to 300 keV three corrections in particular need to be applied to get the photon spectrum: corrections for K-escape, Compton scattering and inefficient photon absorption. A simple 'stripping' procedure is described which may be implemented on a desk type computer. All data necessary are either available in the literature or may be derived from the measurement of very heavily filtered X-ray spectra. The accuracy of the procedure is better than +/- 5% of the peak value. Results are compared with a more detailed stripping procedure, based on Monte Carlo calculated data.

[1]  T R Fewell,et al.  Photon energy distribution of some typical diagnostic x-ray beams. , 1977, Medical physics.

[2]  H Weiss,et al.  Experimental study of the photon energy spectrum of primary diagnostic x-rays. , 1966, Physics in medicine and biology.

[3]  R. Birch,et al.  A technique for measuring the variation of photon spectrum from X-ray generators over the mains voltage cycle. , 1976, Physics in medicine and biology.

[4]  H. Atkins,et al.  Effect of absorption edge filters on diagnostic x-ray spectra. , 1975, Radiology.

[5]  G. Ardran,et al.  A comparison of x-ray spectra and outputs from molybdenum and tungsten targets. , 1975, The British journal of radiology.

[6]  M. Federoff.  Contribution au calcul des conditions optimales d'irradiation et de mesure de la radioactivité en analyse par activation , 1971 .

[7]  T. Paradellis,et al.  A semi-empirical efficiency equation for Ge(Li) detectors , 1969 .

[8]  A. Stacey,et al.  High kilovoltage techniques and the choice of optimal filtration in xeroradiography. , 1977, The British journal of radiology.

[9]  A. Z. Ortaovali,et al.  Calculation of total and full energy peak efficiencies of Ge(Li) and NaI(Tl) detectors by introducing the mean chord length , 1976 .

[10]  B. Grosswendt,et al.  Determination of detector efficiencies for gamma ray energies up to 12 MeV II. Monte Carlo calculation , 1975 .

[11]  F. Perzl,et al.  Spectrometry of low-energy γ- and X-rays with Ge(Li) detectors , 1967 .

[12]  R. Waggener,et al.  Measured x-ray spectra from 25 to 110 kVp for a typical diagnostic unit. , 1972, Radiology.