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

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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.

Original languageEnglish
Article number111
JournalInternational Journal of Thermophysics
Volume38
Issue number7
DOIs
StatePublished - 1 Jul 2017

Keywords

  • Non-radiative relaxation
  • Photoacoustic spectroscopy time
  • Zea mays L

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