𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Threshold photoionization in time-of-flight mass spectrometry

✍ Scribed by Julian Erik Braun; Hans Jürgen Neusser

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
469 KB
Volume
21
Category
Article
ISSN
0277-7037

No coin nor oath required. For personal study only.

✦ Synopsis

Multi-photon excitation in a time-of-flight mass spectrometer (TOF-MS) is shown to lead to threshold ions with defined internal energy. A powerful technique for the production of threshold ions is based on the excitation of high long-lived Rydberg states embedded in the ionization continuum. The Rydberg molecules are separated with suitable separation techniques from ions produced by a direct multi-photon ionization process. Finally, the ionization of the Rydberg molecules in a delayed pulsed electric field leads to threshold ions. This work reviews several separation techniques, and reports on applications of threshold ionization for investigation of the structure, energetics, and dynamics of neutral molecules, molecular cations, and cluster cations.

📜 SIMILAR VOLUMES

Perfect Timing: Time-of-flight Mass Spec
Perfect Timing: Time-of-flight Mass Spectrometry†
✍ M. Guilhaus; V. Mlynski; D. Selby 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 403 KB 👁 2 views

In the 1990s time-of-flight mass spectrometry (TOFMS) has reestablished itself as a mainstream technique in mass spectrometry. There have been several developments which have contributed to this. The development of the technique of matrix-assisted laser desorption/ionization (MALDI), a pulsed ioniza

Orthogonal acceleration time-of-flight m
Orthogonal acceleration time-of-flight mass spectrometry
✍ M. Guilhaus; D. Selby; V. Mlynski 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 918 KB

The principles and applications of time-of-¯ight mass spectrometry involving instruments with independent (orthogonal) axes for ion generation and mass analysis are reviewed. This approach, generally referred to as orthogonal acceleration time-of-¯ight mass spectrometry, has proved particularly adva

Maldi time-of-flight mass spectrometry o
Maldi time-of-flight mass spectrometry of synthetic polymers
✍ Michel W.F. Nielen 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 547 KB

Mass spectrometry of intact synthetic polymers has been limited to ®eld desorption (FD) MS for many years. More recently, soft ionization techniques such as electrospray (ESI) and matrixassisted laser desorption/ionization (MALDI) and the revival of time-of-¯ight analyzers created new opportunities