SciELO - Scientific Electronic Library Online

 
 número65Estudio de la respuesta temporal de dos MCP-PMT a bajas intensidades de la luz utilizando un DRS4Dosimetría in vivo en irradiación corporal total índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO

Compartir


Nucleus

versión impresa ISSN 0864-084Xversión On-line ISSN 2075-5635

Resumen

ORTIZ-RAMIREZ, Pablo  y  LOPEZ-USQUIANO, Franco. Development of a semi-empirical method to determine the efficiency of a gamma radiation detector for point sources. Nucleus [online]. 2019, n.65, pp.47-50.  Epub 27-Jul-2019. ISSN 0864-084X.

In the present work, we introduce the theoretical development and a new approach to validate a novel method to calibrate the efficiency of a gamma radiation detector for point sources, which we have named the “Efficiency Extrapolation Method”.

The method consists in the determination of the detector efficiency using a set of monoenergetic gamma sources, which we will refer to as reference efficiencies. From these values, we will extrapolate the detector efficiency to the complete energy range using the first principle physics of gamma radiation detection theory. Therefore the proposed method corresponds to a semi-empirical one.

The determination of reference efficiencies must be done experimentally, but in this work, simulations were performed using FLUKA code. The reference energies will be: 59,54 keV, 661,66 keV and 1 274,54 keV associated to the isotopes 241Am, 137Cs and 22Na respectively. The second part of the method, the extrapolation from the reference energies to the gamma range, will be done over the energies emitted by 152Eu and 133Ba.

In general, the results are very good. While the obtained results for energies 53,16 keV and greater than 344,3 keV show an excellent agreement, the results obtained for energies in the middle range are only good.

Palabras clave : point sources; gamma radiation; high-purity GE detectors; calibration; accuracy.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )