@article {3638, title = {Frequency-sweep Fourier transform ion cyclotron resonance spectroscopy (Reprinted from Chemical Physics Letters, vol 6, pg 489-490, 1974)}, journal = {Journal of Mass Spectrometry}, volume = {31}, number = {6}, year = {1996}, note = {ISI Document Delivery No.: UQ849Times Cited: 0Cited Reference Count: 3}, month = {Jun}, pages = {588-589}, type = {Reprint}, abstract = {A single ion cyclotron resonance (ICR) absorption spectrum showing both CH3+ and CH4+ signals has been obtained by exciting both ion cyclotron resonances with a frequency-swept rf irradiation, followed by broad-band detection, digitization of the (time-domain) response, and finally discrete Fourier transformation to produce the (frequency-domain) spectrum. Pulsed-excitation Fourier transform ICR has demonstrated the use of broad-band detection in rapid generation of ICR spectra by Fourier transform methods; this paper demonstrates that frequency-sweep excitation can provide the broad-band irradiation required to excite ion cyclotron resonances throughout any desired mass range. It will thus be possible to obtain an ICR absorption spectrum of given mass range, signal-to-noise ratio, and resolution in an observation period which is two orders of magnitude shorter than that needed to obtain the same spectrum by conventional slow-sweep detection.}, isbn = {1076-5174}, url = {://A1996UQ84900003}, author = {Comisarow, M. B. and Marshall, A. G.} }