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spectrum from the reference and sample with intensity being measured by the two detectors. The tuning of each laser is synchronised such that a step change intensity occurs after each cycle (open, reflective blade) of the chopper. Alternatively, instead of a step change, a smooth continuous ...
In the presence of 0.5 Torr CO, the spectrum appears as a single feature at around 2091 cm− 1 due to the superposition of the previous two peaks, suggesting an increase in the density of clusters with increasing pressure. Once CO gas is evacuated from the chamber, CO desorbs completely...
To study the photocarrier excitation process of Bi2O2Se, we recorded photocurrents while changing the wavelengths of incident light and showed photovoltage spectrum in Fig.1f, g. The spectrum extends to ~1700 nm (0.73 eV), which agrees in a reasonable accuracy with the band gap value ...
Thus, the quality of the IR spectrum acquired is improved. This phenomenon is the same as reflection light meeting transmission light in an integrating sphere, that is, reducing interference and increasing absorption27. However, there is a slight difference between the integrating sphere and the ...
Analytical sensitivity was calculated as (SEN/δx), where δx is the approximation of the instrumental noise estimated by the standard deviation of the NAS value for 15 spectra of the reference signal (blank spectrum) [60]. If the value obtained for tbias was greater than the critical value...
Therefore, we conclude that the metabolic differences in apples from different harvest dates cannot be detected in NIR spectra but require other methods or regions of the electromagnetic spectrum. Next a PCA was performed on a subset of NIR spectra, comprising freshly harvested (0 week storage) ...