Dissociative double photoionization of CO2 molecules in the 36–49 eV energy range: angular and energy distribution of ion products

2010 ◽  
Vol 12 (20) ◽  
pp. 5389 ◽  
Author(s):  
M. Alagia ◽  
P. Candori ◽  
S. Falcinelli ◽  
M. Lavollée ◽  
F. Pirani ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Energy Range ◽  
Double Photoionization

Anisotropy of the angular distribution of fragment ions in dissociative double photoionization of N2O molecules in the 30–50eV energy range

2007 ◽  
Vol 126 (20) ◽  
pp. 201101 ◽  
Author(s):  
M. Alagia ◽  
P. Candori ◽  
S. Falcinelli ◽  
M. Lavollée ◽  
F. Pirani ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Energy Range ◽  
Double Photoionization ◽  
Fragment Ions

scholarly journals The computation of Fermi-Dirac functions

1938 ◽  
Vol 237 (773) ◽  
pp. 67-104 ◽  
Keyword(s):  
Energy Distribution ◽  
Energy Range ◽  
Total Energy ◽  
Variational Equation ◽  
Statistical Treatment ◽  
Unit Energy ◽  
Boltzmann Statistics ◽  
Number Of Particles

The quantitative application of Fermi-Dirac statistics involves the evaluation of certain integrals which have not previously been tabulated. In this paper, tables are given of the values of the basic integrals most frequently required , with a view to placing Fermi-Dirrac statistics on as firm a numerical basis as is Maxwell-Boltzmann statistics. T e expression for the energy distribution of particles subject to Fermi-Dirrac statistics may be written in the form dN He) de e<*+Pe -)-1 ’ wherev(e) is the number of states per unit energy range, and dN is the number of particles in the energy range e to e--de. In the statistical treatment, the parameters ot and fi, which are usually introduced as undetermined multipliers in a variational equation, are to be determined from two equations expressing conditions imposed by the total number of particles, and the total energy of the system. By linking up the statistical and thermodynamical treatments, interpretation can be given to a and b this is expressed by P**:l IkT, a = -C lk T ,

Angular and energy distribution of fragment ions in dissociative double photoionization of acetylene molecules at 39 eV

2012 ◽  
Vol 136 (20) ◽  
pp. 204302 ◽  
Author(s):  
M. Alagia ◽  
C. Callegari ◽  
P. Candori ◽  
S. Falcinelli ◽  
F. Pirani ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Double Photoionization ◽  
Fragment Ions

Double photoionization of N2O molecules in the 28–40eV energy range

2006 ◽  
Vol 432 (4-6) ◽  
pp. 398-402 ◽  
Author(s):  
Michele Alagia ◽  
Pietro Candori ◽  
Stefano Falcinelli ◽  
Michel Lavollée ◽  
Fernando Pirani ◽  
...  
Keyword(s):  
Energy Range ◽  
Double Photoionization

scholarly journals Possible interaction between thermal electrons and vibrationally excited N<sub>2</sub> in the lower E-region

2011 ◽  
Vol 29 (3) ◽  
pp. 583-590 ◽  
Author(s):  
K.-I. Oyama ◽  
M. Shimoyama ◽  
J. Y. Liu ◽  
C. Z. Cheng
Keyword(s):  
Distribution Function ◽  
Energy Distribution ◽  
Energy Range ◽  
Laboratory Experiment ◽  
Electron Temperature ◽  
Thermal Energy ◽  
Energy Distribution Function ◽  
Gas Mixture ◽  
Vibrationally Excited ◽  
E Region

Abstract. As one of the tasks to find the energy source(s) of thermal electrons, which elevate(s) electron temperature higher than neutral temperature in the lower ionosphere E-region, energy distribution function of thermal electron was measured with a sounding rocket at the heights of 93–131 km by the applying second harmonic method. The energy distribution function showed a clear hump at the energy of ~0.4 eV. In order to find the reason of the hump, we conducted laboratory experiment. We studied difference of the energy distribution functions of electrons in thermal energy range, which were measured with and without EUV radiation to plasma of N2/Ar and N2/O2 gas mixture respectively. For N2/Ar gas mixture plasma, the hump is not clearly identified in the energy distribution of thermal electrons. On the other hand for N2/O2 gas mixture, which contains vibrationally excited N2, a clear hump is found when irradiated by EUV. The laboratory experiment seems to suggest that the hump is produced as a result of interaction between vibrationally excited N2 and thermal electrons, and this interaction is the most probable heating source for the electrons of thermal energy range in the lower E-region. It is also suggested that energy distribution of the electrons in high energy part may not be Maxwellian, and DC probe measures the electrons which are non Maxwellian, and therefore "electron temperature" is calculated higher.

Dissociative double-photoionization of butadiene in the 25-45 eV energy range using 3-D multi-coincidence ion momentum imaging spectrometry

2015 ◽  
Vol 143 (11) ◽  
pp. 114309 ◽  
Author(s):  
Shabnam Oghbaie ◽  
Mathieu Gisselbrecht ◽  
Joakim Laksman ◽  
Erik P. Månsson ◽  
Anna Sankari ◽  
...  
Keyword(s):  
Energy Range ◽  
Imaging Spectrometry ◽  
Double Photoionization ◽  
Momentum Imaging

Double Photoionization of CO2Molecules in the 34−50 eV Energy Range†

2009 ◽  
Vol 113 (52) ◽  
pp. 14755-14759 ◽  
Author(s):  
M. Alagia ◽  
P. Candori ◽  
S. Falcinelli ◽  
M. Lavollée ◽  
F. Pirani ◽  
...  
Keyword(s):  
Energy Range ◽  
Double Photoionization
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