"Espalhamento Compton e medida absoluta da energia de fótons marcados - Uma simulação Monte Carlo" / Compton scattering and absolute measurement of tagged photon energies.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

A simulation based on Monte Carlo methods was created in order to evaluate the potentiality of using Compton scattering at high energies to obtain high precision absolute measurements of tagged photon energies. This method is based on angular measurements of the scattering products to reconstruct the incident photon energy using the kinematics of Compton scattering in impulse approximation. The simulation includes several effects that are relevant to the measurement, such as electron multiple scattering, internal momentum of the electrons in the atoms of the target, detector resolution and several geometrical parameters of the experimental setup. Through simulation of an experiment that uses this method for energy calibration of a tagged photon beam, it was possible to identify two sources of systematic errors. Analysis methods that minimize one of these systematic errors were developed, as well as methods for the creation of corrections to the energy measurements. Our results show that, at least in the studied experimental setup, it is possible to obtain energy measurements with a precision in the order of 0.07%.

ASSUNTO(S)

photon beam monte carlo simulation feixe de fótons espalhamento compton photometry simulação monte carlo fotometria compton scattering

ACESSO AO ARTIGO

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