Time-of-Flight Studies

E. Botek, J. L. Debrun, B. Hakim, and L. Morin-Allory, Attachment of alkali cations on beta-D-glucopyranose Matrix-assisted laser desorption/ionization time-of-flight studies and ah initio calculations, Rapid Commun. Mass Spectrom, 15 (2001) 273-276. 

Figure 15 Neutron time-of-flight study of 0-(BEDT-TTF)2I3 performed at the IPNS pulsed source (Argonne). (a) Neutron diffraction intensity distribution in the h = 4.92 reciprocal lattice plane at 20 K and ambient pressure. Satellite peaks are observed (arrows) (b) the same reciprocal plane after applying a pressure of 0.14 GPa, warming to room temperature, and cooling back down to 20 K. (From Ref. 64.)...

FIGURE 2.1.4 A tetracene crystal grown by the vapor-Bridgman technique and used for the time-of-flight studies. (From Niemax, J. et al., Appl. Phys. Lett., 86, 122105, 2005.)... 

J. C. (2002) Post-source decay time-of-flight study of fragmentation mechanisms of protonated synthetic polymers under matrix-assisted laser desorption/ionization conditions. Rapid Commun. Mass Spectrom., 16, 596-704. 

In an early study, Greenleaf et al. [4] reported reconstructions of ultrasonic velocity from time-of-flight profiles. Since then there has been periodic activity in using ultrasound to determine the transmission properties attenuation or refractive index. 

Masson F and Rabalais J W 1991 Time-of-flight scattering and recoiling spectrometry (TOF-SARS) analysis of Pt 110. I. Quantitative structure study of the clean (1 x 2) surface Surf. Sc/. 253 245-57... 

The incident ions cause recoil in the surface atoms. In studies of ionic liquids, only direct recoil - that is, motion in the forward direction - was measured. Watson and co-workers [56, 57] used time-of-flight analysis with a pulsed ion beam to measure the kinetic energies of the scattered and sputtered ions and therefore determine the masses of the recoiled surface atoms. By relating the measured intensities of the... 

In the past few years this pulsing technique has been used by several groups, utilizing both magnetic deflection (16, 31, 37) and time-of-flight (12, 13) instruments, to study ion-molecule reactions at thermal energies. Here we review the results obtained and discuss the applications and limitations of the method, based on our observations and experiences over the past three years. 

The pulsed circuitry of the time-of-flight mass spectrometer is ideally suited for this type of operation, and both Hand and von Weyssenhoff (12, 13) and Lampe and Hess (25) have reported experiments using such an instrument with variable delay between the ionizing and withdrawal pulses to study secondary processes. 

Tandem mass spectrometry (MS-MS) uses more than one mass analyzer for structural and sequencing studies that have been found very useful for anthocyanin characterization. These mass analyzers may be of the same type (triple or quadru-poie)85,86 Qj. such as ion trap quadrupole, - and quadrupole-time-of-flight... 

The main implications of the new remote detection methodology are the sensitivity enhancement, which can be several orders of magnitude in certain applications, the option to study flow transiently with time-of-flight techniques and the broadening of the application range of NMR and MRI to samples that were previously... 

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