## Abstract Collision with neutral molecules is shown to provide a convenient method of adding internal energy to ions in a fieldβfree drift region of the mass spectrometer. The effects on this process of ion accelerating potential, target gas pressure and identity, and precursor ion internal energ
Energy transfer in collisional activation of gaseous organic ions
β Scribed by Timothy Wachs; F.W. McLafferty
- Publisher
- Elsevier Science
- Year
- 1977
- Weight
- 320 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0020-7381
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π SIMILAR VOLUMES
We present a novel approach for the determination of activation energy for the unimolecular dissociation of a large (b50 atoms) ion, based on measurement of the unimolecular dissociation rate constant as a function of continuous-wave CO 2 laser intensity. Following a short ($ 1 s) induction period,
It is shown that the optimal means of tabulating collisional energy transfer parameters in gas-phase uni-and ter-molecular reactions is as the average downward energy transfer, rather than the total energy transferred or the collision efficiency.
## Abstract This article is a review of the mechanisms responsible for collisional activation of ions in mass spectrometers. Part I gives a general introduction to the processes occurring when a projectile ion and neutral target collide. The theoretical background to the physical phenomena of curve