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Energy resolution of in-phantom dose and charge measurement techniques used in the reconstruction of electron spectra.

Hugtenburg, R P*; DuSautoy, A R; Duane, S (2002) Energy resolution of in-phantom dose and charge measurement techniques used in the reconstruction of electron spectra. NPL Report. CIRM 50

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Abstract

The energy resolution if spectra derived from dose and charge verses depth measurements performed in a uniform water phantom are examined. A Markov chain Monte Carlo (MCMC) method has been devised to determine spectra for broad parallel electron beams. The MCMC method presented here is an example of an inverse Monte Carlo method, MCMC is able to consider the contribution of electrons sampled from a prior continuous energy domain. Minimum of 10 MeV electrons are 0.28 MeV and 0.59 MeV respectively. The resolution of pre-computed bi-energetic sources are demonstrated and realistic beam spectra are examined for two therapeutic linear accelerators.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CIRM 50
Keywords: electron, spectra, spectrum, Monte Carlo, Markov chain
Subjects: Ionising Radiation
Ionising Radiation > Dosimetry
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2196

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