scholarly journals Vibrationally resolved NO dissociative excitation cross sections by electron impact

2020 ◽  
Vol 29 (5) ◽  
pp. 05LT02 ◽  
Author(s):  
V Laporta ◽  
J Tennyson ◽  
I F Schneider
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Dissociative Excitation ◽  
Excitation Cross Sections

Measurement of absolute electron-impact excitation cross sections in Ar and N2 using H and H2 emissions as secondary standards

1988 ◽  
Vol 66 (4) ◽  
pp. 349-357 ◽  
Author(s):  
J. L. Forand ◽  
S. Wang ◽  
J. M. Woolsey ◽  
J. W. McConkey
Keyword(s):  
Electron Impact ◽  
Cross Section ◽  
Cross Sections ◽  
Emission Cross Section ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Dissociative Excitation ◽  
Excitation Cross Sections ◽  
Line Following ◽  
Good Agreement

A detailed description is given of a technique in which emissions from H and H2 are used to calibrate an apparatus used for electron-impact emission cross-section measurements in the wavelength range 90–130 nm. Absolute emission cross sections have been measured at 200 eV electron-impact energy for the 120 nm N I line following dissociative excitation of N2 and for the Ar and Ar+ lines at 104.8, 106.7, 92.0, and 93.8 nm respectively. Good agreement with earlier works is obtained in the case of the N I line when earlier data are renormalized to take into account the recent revision of the cross section for production of Lyman α from H2. Measurements of the 104.8 and 106.7 nm lines suggest a 40% cascade component for the latter line at energies of 200 eV and above.

scholarly journals Electron-impact dissociative excitation cross sections for singlet states of molecular hydrogen

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
Jonathan K. Tapley ◽  
Liam H. Scarlett ◽  
Jeremy S. Savage ◽  
Dmitry V. Fursa ◽  
Mark C. Zammit ◽  
...  
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Molecular Hydrogen ◽  
Dissociative Excitation ◽  
Singlet States ◽  
Excitation Cross Sections

Intensity Ratios within the Balmer Lines Hα and Hβ After Dissociative Excitation of C6H6 and H2

1976 ◽  
Vol 31 (11) ◽  
pp. 1292-1297 ◽  
Author(s):  
H. J. Hartfuß ◽  
J. Neumann ◽  
H. D. Schneider
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Principal Quantum Number ◽  
Dissociative Excitation ◽  
Total Emission ◽  
Excitation Cross Sections ◽  
Balmer Lines ◽  
State Production ◽  
Intensity Ratios ◽  
Dissocia Tion

Abstract The decay-curves of the Balmer-lines Hα and Hβ have been measured after dissociative excitation of C6H6 and H2 by electron-impact in the 100 eV range. The analysis of the decay-curves shows, in agreement with other authors, that only the 3s-and 3d-states in the case of Hα and the 4s-and 4d-states in the case of Hβ contribute significantly to the total intensity of Hα and Hβ, respectively, but not the p-states 3p and 4p. The intensity-ratios J(3s)/J(Ha) and J(4s)/J(Hβ) have been investigated. Comparison with the total emission cross-sections of the states n=3 and n=4 allows to determine the excitation cross-sections of the sublevels 3s and 4s. It is found that s-state production is favoured in the dissocia-tion process. This seems to be independent on the principal quantum number.

Dissociative excitation of HD +, D 2+, and DT + by electron impact

Open Physics ◽  
2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Mariana Duca ◽  
Magda Fifirig
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Theoretical Study ◽  
Electronic States ◽  
Dissociative Excitation ◽  
Molecular Electronic ◽  
Excitation Cross Sections ◽  
Quantum Defect Theory ◽  
K Matrix ◽  
Diabatic Representation

AbstractIn the framework of the Multi-Channel Quantum Defect Theory (MQDT), a theoretical study of the dissociative excitation is presented. Numerical results for the dissociative excitation cross sections of HD +, D 2+, and DT + with electrons of energy between 2 and 12 eV are reported. The contribution of the vibrational continua of the two lowest electronic states as explicit ionization channels has been considered. Within a quasi-diabatic representation of the molecular electronic states, the Born expansion of second order is done in the K-matrix evaluation.

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