Reactivity of Organic Halides toward the Mobile Electron in Methyltetrahydrofuran Glass

1972 ◽  
Vol 50 (16) ◽  
pp. 2702-2704 ◽  
Author(s):  
Noriyuki Kato ◽  
Kenji Fueki ◽  
Zen-ichiro Kuri
Keyword(s):  
Gas Phase ◽  
Electron Capture ◽  
Cross Section ◽  
Glassy Matrix ◽  
Heat Of Reaction ◽  
Electron Capture Cross Section ◽  
Organic Halides ◽  
Mobile Electron ◽  
Relative Electron ◽  
Phase Data

The relative reactivity of a number of organic halides with the mobile electron produced in γ-irradiated methyltetrahydrofuran glass at 77 °K has been studied by a scavenger competition kinetics. It has been found that for the organic halides there exists a correlation between the relative electron capture cross section in the glassy matrix and the heat of reaction for dissociative electron capture estimated from gas phase data.

scholarly journals FAST NEGATIVE HYDROGEN IONS

1954 ◽  
Vol 32 (4) ◽  
pp. 275-290 ◽  
Author(s):  
A. Charles Whittier
Keyword(s):  
Electron Capture ◽  
Cross Section ◽  
Capture Cross Section ◽  
Hydrogen Gas ◽  
Negative Ion ◽  
Hydrogen Ions ◽  
Capture Cross ◽  
Electron Capture Cross Section ◽  
Magnetic Analysis ◽  
Equilibrium Ratio

A proton beam was directed through hydrogen gas at low pressure and magnetic analysis of the emergent beam showed that an appreciable fraction of the beam was transformed into negative hydrogen ions. After the beam had traversed a sufficient layer of gas, the ratio of negative hydrogen ions to protons reached an equilibrium value which was a maximum of 22.2% at 8.5 kev. The proton energy interval investigated extended from 4 to 70 kev.In this interval the electron loss cross section for negative hydrogen ions was measured and found to vary from 6.3 × 10−16 sq. cm. at 4.2 kev. to 2.5 × 10−10 sq. cm. at 70.3 kev. The electron capture cross section for protons in hydrogen was measured over the same interval and the results agreed substantially with those of other workers. The electron capture cross section for neutral atoms was also determined by combining present results for the negative ion loss cross section and for the equilibrium ratio of H− to H+ with the values of Bartels and of Montague and Ribe for the ratio of neutral atom loss cross section to the proton capture cross section.

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