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 -