Search Results - "Collings, B.A"

Increased Fragmentation Efficiency of Ions in a Low Pressure Linear Ion Trap with an Added dc Octopole Field by Collings, B.A.

“…In-trap fragmentation of ions in a hybrid linear ion trap triple quadrupole mass spectrometer occurs at pressures about 5e-5 torr. At these low pressures,…”
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Resonant excitation in a low-pressure linear ion trap by Collings, B.A, Stott, W.R, Londry, F.A

“…It has been shown that through the process of resonant excitation the fragmentation of ions confined in a low-pressure (<0.05 mTorr) linear ion trap (LIT) can…”
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Collision cross sections of myoglobin and cytochrome c ions with Ne, Ar, and Kr by Chen, Yu-Luan, Collings, B.A., Douglas, D.J.

“…The energy losses of ions of myoglobin and cytochrome c in collisions with Ne, Ar, and Kr have been measured with a triple quadrupole mass spectrometer system…”
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Observation of higher order quadrupole excitation frequencies in a linear ion trap by Collings, B.A, Douglas, D.J

“…The resonant frequencies for quadrupole excitation of ions confined with a buffer gas in a linear quadrupole ion trap with Mathieu parameters a = 0 and q ≈…”
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Resonance shifts in the excitation of the n = 0, K = 1 to 6 quadrupolar resonances for ions confined in a linear ion trap by Collings, B.A., Sudakov, M., Londry, F.A.

“…Experiments examining the excitation of the quadrupolar n = 0, K = 1 to 6 resonances for the ion reserpine in a linear ion trap have been shown to produce…”
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An atom-resolved view of silicon nanoclusters by McComb, D.W., Collings, B.A., Wolkow, R.A., Moffatt, D.J., MacPherson, C.D., Rayner, D.M., Hackett, P.A., Hulse, J.E.

“…Atomically resolved scanning tunneling microscope images of Si clusters deposited onto a Si(111)-7 × 7 substrate have been obtained. The clusters display a…”
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An extended mass range quadrupole for electrospray mass spectrometry by Collings, B.A., Douglas, D.J.

“…The mass range of a quadrupole mass spectrometer with an eleetrospray source has been increased from m/z 4000 to m/z 8585 by lowering the radio frequency of…”
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