The convolution problem in COIN spectroscopy

General formulae are derived for the interferometric COIN (Coherence Observ ation by Interference Noise) signal in the Limit of finite width pulses. Ga ussian and exponential forms of the pulses have been used in the numerical calculations of the COIN observable. Qualitative agreement with experiment is found for the form of the COIN signal. As compared to previous studies u sing the delta-function form of the pulses unexpected sensitivity of the ev aluated variance to the pulse-width, T-2-relaxation, and detuning is found. (C) 1999 Elsevier Science B.V. All rights reserved.