Efficiency stability of HPGe detectors under distinct count rates

Authors

  • Guilherme Soares Zahn Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP https://orcid.org/0000-0003-3237-8588
  • Frederico Antonio Genezini Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1410

Keywords:

HPGe, efficiency stability, pile up

Abstract

In this work the reproducibility of the efficiency of different HPGe detectors was analyzed under a series of different conditions. The detectors studied were plugged either to a regular analogical amplifier or to a digital signal processing (DSP) device, in order to evaluate the possible differences between either setup. Detectors were inspected by performing a long series of sequential measurements with standard calibration sources, and comparing the standard deviation of the number of counts per second in each series to the uncertainty of the individual measurements. Detectors were also subjected to distinct count rates, in order to verify the possible experimental issues associated with this parameter. The results allow a discussion on the stability of the detectors’ efficiencies over a few days, the possible dependence with the count rate, and the estimation of the uncertainty related to the efficiency variation.

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Author Biographies

  • Guilherme Soares Zahn, Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
    Centro do Reator de Pesquisas - CERPQ
  • Frederico Antonio Genezini, Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
    Centro do Reator de Pesquisas - CERPQ

References

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LOVELAND, W. D. ; MORRISSEY, D. J. ;SEABORG, G. T., Modern Nuclear Chemistry, Hoboken : John Wiley & Sons, 2006.

SIEGERT, H; SCHRADER, H. ;SCHÖTZIG, U. Half-life measurements of Europium radionuclides and the long-term stability of detectors, Appl Radiat Isot, v.49, p. 1397–1401,1998.

ALVES, A. P. ; AMARAL, A. M., KASTNER, G. F. ;FERREIRA, A. V. HPGe Gamma Detector:Efficiency Curve Evaluationduring Ten Years Of Operation, In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, 2009, Rio de Janeiro, Annals… Rio de Janeiro, Comissão Nacional de Energia Nuclear, 2009.

ZAHN , G. S. ; GENEZINI, F. A. ; TICIANELLI, R. B. ; SAIKI, M. Long-term performance assessment of HPGE detectors used in the neutron activation analysis laboratory of IPEN-CNEN/SP (Brazil), Appl Radiat Isot, v125, p. 108–112,2017.

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Published

2021-04-30

Issue

Section

The Meeting on Nuclear Applications (ENAN) 2019

How to Cite

Efficiency stability of HPGe detectors under distinct count rates. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 9, n. 1A, 2021. DOI: 10.15392/bjrs.v9i1A.1410. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/1410. Acesso em: 22 dec. 2024.

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