Production of metastable hydrogen atoms by charge exchange of protons in potassium vapor

1976 ◽  
Vol 56 (4) ◽  
pp. 261-262 ◽  
Author(s):  
T. Nagata
Keyword(s):  
Charge Exchange ◽  
Hydrogen Atoms ◽  
Potassium Vapor

scholarly journals Magnetic Field Generation by Charge Exchange in a Supernova Remnant in the Early Universe

2021 ◽  
Vol 922 (1) ◽  
pp. 63
Author(s):  
Shuhei Kashiwamura ◽  
Yutaka Ohira
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Early Universe ◽  
Charge Exchange ◽  
External Force ◽  
Supernova Remnant ◽  
Hydrogen Atoms ◽  
Return Current ◽  
Downstream Region ◽  
The Magnetic Field

Abstract We present new-generation mechanisms of magnetic fields in supernova remnant shocks propagating to partially ionized plasmas in the early universe. Upstream plasmas are dissipated at the collisionless shock, but hydrogen atoms are not dissipated because they do not interact with electromagnetic fields. After the hydrogen atoms are ionized in the shock downstream region, they become cold proton beams that induce the electron return current. The injection of the beam protons can be interpreted as an external force acting on the downstream proton plasma. We show that the effective external force and the electron return current can generate magnetic fields without any seed magnetic fields. The magnetic field strength is estimated to be B ∼ 10 − 14 – 10 − 11 G , where the characteristic length scale is the mean free path of charge exchange, ∼ 10 15 cm . Since protons are marginally magnetized by the generated magnetic field in the downstream region, the magnetic field could be amplified to larger values and stretched to larger scales by turbulent dynamo and expansion.

Formation of metastable hydrogen atoms by charge exchange of protons in cesium vapor

1974 ◽  
Vol 9 (3) ◽  
pp. 1242-1251 ◽  
Author(s):  
Vu Ngoc Tuan ◽  
G. Gautherin ◽  
A. S. Schlachter
Keyword(s):  
Charge Exchange ◽  
Cesium Vapor ◽  
Hydrogen Atoms

scholarly journals Classical Description of Resonant Charge Exchange Involving the Second Flavor of Hydrogen Atoms

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 41
Author(s):  
Eugene Oks
Keyword(s):  
Perturbation Theory ◽  
Electric Field ◽  
Charge Exchange ◽  
Cross Sections ◽  
Stark Effect ◽  
Uniform Electric Field ◽  
Hydrogen Atoms ◽  
Additional Tool ◽  
Classical Description ◽  
Resonant Charge Exchange

We studied the consequences of the existence of the second flavor of hydrogen atoms (SFHA)—the existence proven by atomic experiments and evidenced by astrophysical observations—on the resonant charge exchange. We found analytically that there is indeed an important difference in the corresponding cross-sections for the SFHA compared to the usual hydrogen atoms. This difference could serve as an additional tool for distinguishing between the two kinds of hydrogen atoms in future experiments/observations. We also show that the SFHA does not exhibit any Stark effect—whether in a uniform or a non-uniform electric field—in any order of the perturbation theory.

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