Binary encounter models for electron ionization of atoms: A one parameter expression for electron energy dependent (E<200eV) single ionization cross section

2012 ◽  
Vol 328-329 ◽  
pp. 2-16 ◽  
Author(s):  
B. Tsipinyuk ◽  
A. Bekkerman ◽  
E. Kolodney
Keyword(s):  
Electron Energy ◽  
Cross Section ◽  
Ionization Cross Section ◽  
Electron Ionization ◽  
Ionization Cross ◽  
Single Ionization ◽  
Energy Dependent ◽  
Binary Encounter

A measurement of the ionization cross-section of Ne + to Ne 2+ by electron impact

1963 ◽  
Vol 274 (1359) ◽  
pp. 546-551 ◽  
Keyword(s):  
Electron Energy ◽  
Cross Section ◽  
Ionization Cross Section ◽  
Incident Electron Energy ◽  
Ionization Cross ◽  
Maximum Value ◽  
Beam Method ◽  
The Cross ◽  
Semi Empirical ◽  
Limits Of Error

The crossed-beam method described by the authors in 1961 was used to measure the cross-section of Ne + in the reaction Ne + + e → Ne 2+ + 2 e . The cross-section increases linearly with electron energy near the threshold and attains a maximum value of 3·13 x 10 -17 cm 2 at 200 eV. The errors in the measurements were estimated to be less than ± 10% and the highest incident electron energy used was 1000 eV. A semi-empirical formula proposed by Drawin in 1961 describes the measured cross-section within the above limits of error when the two adjustable parameters take the values ξf 1 = 5·25 and f 2 = 0·70.

Electron ionization cross-section and fragmentation of α-cyclohexanedione

2012 ◽  
Vol 309 ◽  
pp. 192-199 ◽  
Author(s):  
Anamika Mukhopadhyay ◽  
Arup Kumar Ghosh ◽  
Moitrayee Mukherjee ◽  
Tapas Chakraborty
Keyword(s):  
Cross Section ◽  
Ionization Cross Section ◽  
Electron Ionization ◽  
Ionization Cross

scholarly journals Photoionization of Kr 4s. III. Detailed and extended measurements of the Kr 4s-electron ionization cross section

1994 ◽  
Vol 27 (8) ◽  
pp. 1489-1496 ◽  
Author(s):  
A Ehresmann ◽  
F Vollweiler ◽  
H Schmoranzer ◽  
V L Sukhorukov ◽  
B M Lagutin ◽  
...  
Keyword(s):  
Cross Section ◽  
Ionization Cross Section ◽  
Electron Ionization ◽  
Ionization Cross

A measurement of the electron impact ionization cross section of atomic hydrogen in the metastable 2S state

1975 ◽  
Vol 343 (1634) ◽  
pp. 333-349 ◽  
Keyword(s):  
Electric Field ◽  
Electron Energy ◽  
Cross Section ◽  
Cross Sections ◽  
Ionization Cross Section ◽  
Impact Ionization ◽  
Weak Field ◽  
Weak Electric Field ◽  
Hydrogen Atoms ◽  
Ionization Cross

The total ionization cross section for electrons colliding with metastable 2S atoms has been measured up to 500 eV electron energy by a crossed beam technique. A beam of fast hydrogen atoms, containing about 25% in the 2S state and the rest in the IS ground state, is formed by charge capture onto protons that are passed through a caesium vapour target. Protons emerging from the target are removed from the beam by deflexion in a weak electric field. Atoms formed by capture into long-lived, high quantum states are first ionized in a topographically suitable field and then removed by deflexion in the weak field. The signal arising from electron ionization of the 2S atoms is identified by quenching them in a pulsed electric field. Contributions from other sources of extraneous ionization are eliminated by modulated beam techniques. The cross sections are determined from absolute measurements of the beam fluxes, the geometry of the interaction region and the rate at which 2S atoms are ionized. The results show that as the electron energy is raised, the ionization cross section for 2S atoms rises to a maximum at about 4 times the ionization energy of the 2S state. This maximum, about 10 -15 cm 2 , is 13 times larger than th at of the IS atoms. Comparison with various theoretical determinations indicates th at best agreement is obtained with the Born approximation which includes exchange, but below 100eV the classical Monte Carlo approximation agrees equally well with observations.

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