Search results
Results From The WOW.Com Content Network
This is effectively a chain reaction of electron generation, and is dependent on the free electrons gaining sufficient energy between collisions to sustain the avalanche. [17] Ionization efficiency is the ratio of the number of ions formed to the number of electrons or photons used. [18] [19]
Chemi-ionization is the formation of an ion through the reaction of a gas phase atom or molecule with another atom or molecule when the collision energy is below the energy required to ionize the reagents. [1] [2] The reaction may involve a reagent in an excited state [3] or may result in the formation of a new chemical bond.
For a proton transfer reaction, this is just the difference in proton affinity between the neutral reagent molecule and the neutral analyte molecule. [8] This results in significantly less fragmentation than does 70 eV electron ionization (EI). The following reactions are possible with methane as the reagent gas.
The original ionization event in these instruments results in the formation of an "ion pair"; a positive ion and a free electron, by ion impact by the radiation on the gas molecules. The ionization chamber is the simplest of these detectors, and collects all the charges created by direct ionization within the gas through the application of an ...
The self-ionization of water (also autoionization of water, autoprotolysis of water, autodissociation of water, or simply dissociation of water) is an ionization reaction in pure water or in an aqueous solution, in which a water molecule, H 2 O, deprotonates (loses the nucleus of one of its hydrogen atoms) to become a hydroxide ion, OH −.
Electron Ionization of Methanol - Born Oppenheimer Potential Curves. In this process, an electron from the analyte molecule (M) is expelled during the collision process to convert the molecule to a positive ion with an odd number of electrons. The following gas phase reaction describes the electron ionization process [10]
US tech stocks were steady on Tuesday after they slumped on Monday following the sudden rise of Chinese-made artificial intelligence (AI) app DeepSeek. Shares in chip giant Nvidia rose by 8.8% ...
Associative ionization is a gas phase reaction in which two atoms or molecules interact to form a single product ion. [4]+ + + where species A with excess internal energy (indicated by the asterisk) interacts with B to form the ion AB +.