Ionization energy, in chemistry and physics, the amount of energy required to remove an electron from an isolated atom or molecule. The ionization energy associated with removal of the first (most loosely held) electron, however, is most commonly used.
Double ionization of helium by He + projectiles ion-atom collisionshelium ionscross sectionselectron correlationelectron emissionenergy dependenceionizationkev range 100-1000The ratio of the cross section for ... AK Edwards,RM Wood,RL Ezell - 《Phys.rev.a》 被引量: 23发表: 1985年 Calculations of...
The total ionization cross sections of He, N2, H2 and O2 due to electron impact have been calculated by integrating the expressions given by Khare for the ionization cross sections per unit energy range. The results are in satisfactory agreement with the experimental data. Comparison has also bee...
Ionizations can be produced in liquids in many ways, for example by exposure to high energy radiation (fast electrons or alphas) or by interaction with ultraviolet photons of sufficient energy. The passage of a high energy electron results in well separated clusters, each containing a few ioniza...
ionization potential, <Iex> is the average energy of atom excitation, <Nex> is the average number of excited atoms, <Ni> is the average number of electron-ion pairs, Ki is a factor taking into account multiple acts of ionization, and <E> is the average kinetic energy of subexitation ...
Loss of this electron gives an ion with a single positive charge. The energy necessary to remove the most loosely held electron from the gaseous + 1 ion is the second ionization energy. Third, fourth, and so on, ionization energies can be measured similarly. Ionization energy values are ...
In this paper we present the calculations of: (a) the single-ionization cross section of He by protons and anti-protons in the incident energy range of about 10 keV - 50 MeV, (b) the double-ionization cross sections by both projectiles in the energy rage of about 50 keV - 20 MeV and...
The matrixionizationof proteins when excited by laser energy. 基质在激光能量的激发下使蛋白离子化. 期刊摘选 The basic characters ofionizationcurrent are studied by means of the steady flame of blowtorch. 利用喷灯的稳定火焰,对离子电流的特性进行了研究. ...
of beryllium ([He]2s2) is anselectron, whereas the electron removed during the ionization of boron ([He]2s22p1) is apelectron; this results in lower first ionization energy for boron, even though its nuclear charge is greater by one proton. Thus, we see a small deviation from the ...
EI or PI involves the collision of an electron or photon of sufficient energy with a neutral (or ionized) target particle and the subsequent production of an ion and the respective ejected electron(s). The term ‘electron impact ionization’ is somewhat misleading, because an electron is small...