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Photoacoustic Determination of Non-radiative Relaxation Time of Absorbing Centers in Maize Seeds

  • A. Domínguez-PachecoEmail author
  • C. Hernández-Aguilar
  • A. Cruz-Orea
20th ECTP
Part of the following topical collections:
  1. 20th European Conference on Thermophysical Properties

Abstract

Using non-destructive photothermal techniques, it is possible to characterize non-homogenous materials to obtain its optical and thermal properties through photoacoustic spectroscopy (PAS). In photoacoustic (PA) phenomena, there are transient states of thermal excitation, when samples absorb the incident light; these states manifest an excitation process that generates the PA signal, being in direct relation with the non-radiative relaxation times with the sample absorbent centers. The objective of this study was to determine the non-radiative relaxation times associated with different absorbent centers of corn seeds (Zea mays L.), by using PAS. A frequency scan was done at different wavelengths (350 nm, 470 nm and 650 nm) in order to obtain the non-radiative relaxation times with different types of maize seeds.

Keywords

Non-radiative relaxation Photoacoustic spectroscopy time Zea mays L. 

Notes

Acknowledgements

The authors thank Instituto Politécnico Nacional; through CONACYT, COFAA, EDI and projects SIP scholarships. Also, we thank INIFAP, Campus Montecillo and Photothermal Techniques Laboratory of Physics Department, CINVESTAV-IPN for the support to develop the experiments of the present study. One of the authors (A. Cruz-Orea) is grateful for the economic support of CONACYT through Project 241330. We also thank Ing. Esther Ayala at the Physics Department of CINVESTAV-IPN for her technical support.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • A. Domínguez-Pacheco
    • 1
    Email author
  • C. Hernández-Aguilar
    • 1
  • A. Cruz-Orea
    • 2
  1. 1.Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico NacionalSEPI–ESIME-Zac.Ciudad de MéxicoMexico
  2. 2.Departamento de FísicaCINVESTAV–IPNCiudad de MéxicoMexico

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