A new time of flight mass spectrometer for absolute dissociative electron attachment cross-section measurements in gas phase

The Review of Scientific Instruments
Dipayan ChakrabortyDhananjay Nandi

Abstract

A new time of flight mass spectrometer (TOFMS) has been developed to study the absolute dissociative electron attachment (DEA) cross section using a relative flow technique of a wide variety of molecules in gas phase, ranging from simple diatomic to complex biomolecules. Unlike the Wiley-McLaren type TOFMS, here the total ion collection condition has been achieved without compromising the mass resolution by introducing a field free drift region after the lensing arrangement. The field free interaction region is provided for low energy electron molecule collision studies. The spectrometer can be used to study a wide range of masses (H-ion to few hundreds atomic mass unit). The mass resolution capability of the spectrometer has been checked experimentally by measuring the mass spectra of fragment anions arising from DEA to methanol. Overall performance of the spectrometer has been tested by measuring the absolute DEA cross section of the ground state SO2molecule, and the results are satisfactory.

References

Mar 1, 1990·Physical Review. a·E Krishnakumar, S K Srivastava
Feb 19, 2015·Physical Chemistry Chemical Physics : PCCP·Pamir Nag, Dhananjay Nandi
Aug 19, 2015·The Journal of Physical Chemistry Letters·Y KawaraiD S Slaughter
Nov 26, 2016·Physical Chemistry Chemical Physics : PCCP·Dipayan ChakrabortyDhananjay Nandi
Aug 10, 2017·The Journal of Chemical Physics·K GopeE Krishnakumar

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Citations

Sep 26, 2019·Physical Chemistry Chemical Physics : PCCP·Dipayan ChakrabortyDhananjay Nandi

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