Ionization Equilibrium
نویسندگان
چکیده
منابع مشابه
Non-equilibrium Photodissociation Regions: Ionization-dissociation Fronts
We discuss the theory of coupled ionization{dissociation fronts produced when molecular clouds are exposed to < 1110 A radiation from hot stars. A steady, composite structure is developed, which generally includes an ionized outtow away from the cloud, an ionization front, a layer of photodissociated gas, a photodissociation front, and a shock wave preceding the photodissociation front. We show...
متن کاملIonization Equilibrium in the Electron-Proton Gas
Using Fefferman's analysis of the quantum electron-proton gas, we give a rigorous proof of ionization equilibrium in this system. Ionization equilibrium phases are obtained as low-density and low-temperature limits, letting the chemical potential #(T) approach the ground-state energy of the hydrogen atom as the temperature T tends to zero. The rate of ionization is determined by the slope of #(...
متن کاملThe ionization equilibrium of iron in H ii regions
We study the ionization equilibrium of Fe using photoion-ization models that incorporate improved values for the ionization and recombination cross-sections and the charge-exchange rates for the Fe ions. The previously available photoionization models predict concentrations of Fe 3+ which are a factor of 3–8 higher than the values inferred from emission lines of [Fe iii] and [Fe iv]. Our new mo...
متن کاملNon-equilibrium Ionization State of Warm–hot Intergalactic Medium
Time evolution of the ionization state of metals in the cosmic baryons is investigated in a cosmological context without the assumption of ionization equilibrium. We find that a significant fraction of ionized oxygen (Ovii and Oviii) in the warm-hot intergalactic medium (WHIM) is not in the ionization equilibrium state at a redshift of z≃ 0. We also investigate the effect on the detectability a...
متن کاملDegree of Ionization of a Plasma in Equilibrium
Previous investigations derived the SAHA equation for a plasma in equilibrium applying the free-bound concept valid for an isolated electron-ion pair. In our investigation of the "adapted free-bound model" (I) we have shown that due to the free-bound interaction the demarcation between free and bound states is shifted by A%= —e2/r0 . We study the influence of this shift of the ionization limit ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physical Chemistry
سال: 1915
ISSN: 0092-7325,1541-5740
DOI: 10.1021/j150156a002