Charge exchange recombination spectroscopy for α particles colliding with hydrogen atoms

2011 ◽  
Vol 18 (10) ◽  
pp. 103301 ◽  
Author(s):  
X. J. Liu ◽  
L. Liu ◽  
J. G. Wang ◽  
Y. Z. Qu ◽  
B. J. Xiao
Keyword(s):  
Charge Exchange ◽  
Hydrogen Atoms ◽  
Α Particles

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
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