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Transcript of Comments on capture of electrons by ions Ladislav Kocbach University of Bergen, Norway.
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Comments on capture of electrons by ions
Ladislav Kocbach University of Bergen, Norway
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Comments on capture of electrons by ionsin ion-atom and ion-ion collisions
Ladislav Kocbach University of Bergen, Norway
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Capture of electrons by ionsin ion-atom and ion-ion collisions
Electron Capture
Electron Transfer
Charge Exchange Charge Exchange Processes
Charge Transfer
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Selective population of the n=3 level of hydrogen-like carbon in two colliding laser-produced plasmas
F. Ruhl, L. Aschke and H.-J. Kunze
Phys. Lett. A 225 (1997) 107-112
The possibility is investigated that charge exchange collisions between ions of a hot plasma (C6+) and a cold plasma (C2+) is responsible for selectively enhanced emission of the C5+ Balmer-alpha line emitted from the interaction zone of the two colliding laser-produced plasmas.
Electron capture by bare carbon from doubly ionized carbon
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Electron capture by bare carbon
from doubly ionized carbon
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Electron capture by bare carbon from doubly ionized carbon
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
![Page 7: Comments on capture of electrons by ions Ladislav Kocbach University of Bergen, Norway.](https://reader036.fdocuments.in/reader036/viewer/2022062721/56649f1c5503460f94c31e65/html5/thumbnails/7.jpg)
Electron capture by bare carbon from doubly ionized carbon
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
![Page 8: Comments on capture of electrons by ions Ladislav Kocbach University of Bergen, Norway.](https://reader036.fdocuments.in/reader036/viewer/2022062721/56649f1c5503460f94c31e65/html5/thumbnails/8.jpg)
Electron capture by bare neon from neutral (atomic) hydrogen (THEORY)
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Comparison of experimental data on cross sections for H+ + H collision products
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Electron capture by proton from neutral (atomic) oxygen (important in aurora physics)
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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resonant charge exchange normal charge exchange
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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We shall explain the three features:
1. why does excitation/ionization remain large2. Why the charge exchange is ‘narrower’3. The behaviour of the resonant cross section
resonant charge exchange normal charge exchange
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Ionization and Excitation Theories
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Time-Dependent Schrödinger Equation
Perturbation Theory
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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The typical shape of the F(s)
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Understanding the shape F(s) of excitation cross sections
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Understanding the shape F(s) of excitation cross sections
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
![Page 25: Comments on capture of electrons by ions Ladislav Kocbach University of Bergen, Norway.](https://reader036.fdocuments.in/reader036/viewer/2022062721/56649f1c5503460f94c31e65/html5/thumbnails/25.jpg)
Understanding the shape F(s) of excitation cross sections
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
![Page 26: Comments on capture of electrons by ions Ladislav Kocbach University of Bergen, Norway.](https://reader036.fdocuments.in/reader036/viewer/2022062721/56649f1c5503460f94c31e65/html5/thumbnails/26.jpg)
Understanding the shape F(s) of excitation cross sections
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
![Page 27: Comments on capture of electrons by ions Ladislav Kocbach University of Bergen, Norway.](https://reader036.fdocuments.in/reader036/viewer/2022062721/56649f1c5503460f94c31e65/html5/thumbnails/27.jpg)
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
Ionization, excitation
Charge Exchange
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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The decrease at large projectile velocitiesexplained.
The resonant property associated with
Alternative,Nonperturbative explanation
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Place the electron in one well: Time development
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Time development
Place the electron in one well
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Time development
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
Probability as function of impact parameter
b[a.u.]
~ 0.5
(bmax)2
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= +
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
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Electron capture by bare neon from neutral (atomic) hydrogen (THEORY)
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003
If there is any resonant or quasi-resonant process,it will dominate
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We have explained these three features:
1. excitation/ionization remain large at large energies2. the charge exchange is ‘narrower’3. The behaviour of the resonant cross section
resonant charge exchange normal charge exchange
Workshop “Ultrashort pulse laser-plasma interactions”, Prague, September 24-27, 2003