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Implementation of a preamplifier-amplifier system for radiation detectors used in Mössbauer spectroscopy

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LACAME 2012

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Abstract

We report the assembly and testing of a preamplification and amplification system for pulses produced by gaseous radiation detectors commonly used in Mössbauer spectroscopy. The system is composed by a pair of commercial integrated circuits A203 and A206, which operate as charge sensitive preamplifier-shaping amplifier and linear amplifier-low level discriminator, respectively. The integrated circuits were interconnected in the unipolar output mode and placed inside a metallic shielding, which prevents noise amplification for a suitable signal-noise ratio. The system was tested by irradiating a proportional counter LND-45431 with characteristic X rays of 6.3 keV and gamma rays of 14.4 keV emitted by a Mössbauer radioactive source of 57Co (Rh). Unipolar pulses with Gaussian profile were obtained at the output of the linear amplifier, whose amplitudes were close to 0.4 V for 6.3 keV X rays and 1.4 V for 14.4 keV gamma rays. Pulse height spectra showed that the system allows a satisfactory identification of the X-rays and gamma rays emitted by the 57Co source, giving the possibility to make a good selection of the 14.4 keV peak for having a suitable signal-noise ratio in the Mössbauer spectra. Absorption percentages of 14 % were found by taking the Mössbauer spectra of a natural iron absorber. The assembly and tests of the system are presented through this paper.

Thirteenth Latin American Conference on the Applications of the Mössbauer Effect, LACAME 2012, Medellín Columbia, 11–16 November 2012.

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References

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Author information

Authors and Affiliations

  1. Grupo de Electromagnetismo Aplicado, Universidad EAFIT, A. A 3300, Medellín, Colombia

    A. A. Velásquez & M. Arroyave

Authors
  1. A. A. Velásquez
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  2. M. Arroyave
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Editor information

Editors and Affiliations

  1. Instituto de Física, Universidad de Antioquia, Medellín, Colombia

    C. A. Barrero Meneses

  2. Centro de Ciências Exatas Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, Brazil

    E. Passamani Caetano

  3. Departamento de Física y Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina

    C. E. Rodríguez Torres

  4. Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile

    C. Pizarro

  5. Departamento de Física, Universidad del Valle, Cali, Colombia

    L. E. Zamora Alfonso

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Velásquez, A.A., Arroyave, M. (2013). Implementation of a preamplifier-amplifier system for radiation detectors used in Mössbauer spectroscopy. In: Meneses, C.A.B., Caetano, E.P., Torres, C.E.R., Pizarro, C., Alfonso, L.E.Z. (eds) LACAME 2012. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6482-8_8

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  • DOI: https://doi.org/10.1007/978-94-007-6482-8_8

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-007-6481-1

  • Online ISBN: 978-94-007-6482-8

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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