TY - JOUR
T1 - High-resolution frequency analysis by the use of derivatives of the Fourier transform
T2 - Application to fluorescence quantum beats
AU - Kono, Hirohiko
AU - Kawata, Isao
AU - Ohta, Nobuhiro
PY - 1999/6/1
Y1 - 1999/6/1
N2 - The ν th frequency derivative of the Fourier spectrum obtained by the use of t(ν)-windows is proposed with some applications to practical examples. Derivative power spectra have higher resolution and lower base lines than conventional spectra (e.g., ν = 0), and are insensitive to the choice of the beginning of the acquisition duration. For extremely large ν, the spectrum is not resolved well. The optimal value of ν is determined so that the main body of the product of the window t(ν) and the signal is accommodated in the range where the S/N ratio is relatively high. This criterion is successfully applied to a signal generated from a known spectrum and to fluorescence quantum beats in pyrimidine at zero and nonzero magnetic fields.
AB - The ν th frequency derivative of the Fourier spectrum obtained by the use of t(ν)-windows is proposed with some applications to practical examples. Derivative power spectra have higher resolution and lower base lines than conventional spectra (e.g., ν = 0), and are insensitive to the choice of the beginning of the acquisition duration. For extremely large ν, the spectrum is not resolved well. The optimal value of ν is determined so that the main body of the product of the window t(ν) and the signal is accommodated in the range where the S/N ratio is relatively high. This criterion is successfully applied to a signal generated from a known spectrum and to fluorescence quantum beats in pyrimidine at zero and nonzero magnetic fields.
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U2 - 10.1246/bcsj.72.1225
DO - 10.1246/bcsj.72.1225
M3 - Article
AN - SCOPUS:0032991745
VL - 72
SP - 1225
EP - 1231
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 6
ER -