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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F14%3A10289675%21RIV15-MSM-11320___
rdf:type
n13:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1103/PhysRevA.90.042708
dcterms:description
Stationary afterglow measurements in conjunction with near-infrared absorption spectroscopy show that the recombination of the H-3(+) ion with electrons in ionized gas mixtures of He, Ar, and H-2 at 300 K is strongly enhanced by neutral helium and by molecular hydrogen. The H-2-assisted ternary recombination coefficient K-H2 = (8.7 +/- 1.5) x 10(-23) cm(6)s(-1) substantially exceeds the value measured for H-3(+) in ambient helium (K-He similar to 10(-25) cm(6) s(-1)) or predicted by the generally accepted classical theory of Bates and Khare (similar to 10(-27) cm(6) s(-1)) for atomic ions. Because of the extremely large value of K-H2 in a hydrogen plasma the ternary recombination dominates over binary recombination already at pressures above 3 Pa. This can have consequences in plasma physics, astrophysics, recombination pumped lasers, plasma spectroscopy, plasmatic technologies, etc. The ternary processes provide a plausible explanation for the discrepancies between many earlier experimental results on H-3(+) recombination. The observation that the ternary process saturates at high He and H-2 densities suggests that recombination proceeds by a two-step process: formation of a long-lived complex [with a rate coefficient alpha(F) = (1.5 +/- 0.1) x 10(-7) cm(3) s(-1)] followed by collisional stabilization. Stationary afterglow measurements in conjunction with near-infrared absorption spectroscopy show that the recombination of the H-3(+) ion with electrons in ionized gas mixtures of He, Ar, and H-2 at 300 K is strongly enhanced by neutral helium and by molecular hydrogen. The H-2-assisted ternary recombination coefficient K-H2 = (8.7 +/- 1.5) x 10(-23) cm(6)s(-1) substantially exceeds the value measured for H-3(+) in ambient helium (K-He similar to 10(-25) cm(6) s(-1)) or predicted by the generally accepted classical theory of Bates and Khare (similar to 10(-27) cm(6) s(-1)) for atomic ions. Because of the extremely large value of K-H2 in a hydrogen plasma the ternary recombination dominates over binary recombination already at pressures above 3 Pa. This can have consequences in plasma physics, astrophysics, recombination pumped lasers, plasma spectroscopy, plasmatic technologies, etc. The ternary processes provide a plausible explanation for the discrepancies between many earlier experimental results on H-3(+) recombination. The observation that the ternary process saturates at high He and H-2 densities suggests that recombination proceeds by a two-step process: formation of a long-lived complex [with a rate coefficient alpha(F) = (1.5 +/- 0.1) x 10(-7) cm(3) s(-1)] followed by collisional stabilization.
dcterms:title
H-2-assisted ternary recombination of H-3(+) with electrons at 300 K H-2-assisted ternary recombination of H-3(+) with electrons at 300 K
skos:prefLabel
H-2-assisted ternary recombination of H-3(+) with electrons at 300 K H-2-assisted ternary recombination of H-3(+) with electrons at 300 K
skos:notation
RIV/00216208:11320/14:10289675!RIV15-MSM-11320___
n3:aktivita
n7:P n7:I n7:S
n3:aktivity
I, P(GAP209/12/0233), P(GP14-14649P), S
n3:cisloPeriodika
4
n3:dodaniDat
n15:2015
n3:domaciTvurceVysledku
n12:1847228 n12:8133824 n12:2913623 n12:8991596 n12:9667334 n12:3847632
n3:druhVysledku
n8:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
20179
n3:idVysledku
RIV/00216208:11320/14:10289675
n3:jazykVysledku
n14:eng
n3:klicovaSlova
molecules; dependence; gas; h-3+; afterglow; temperature; spectroscopy; plasma; d-3(+) ions; dissociative recombination
n3:klicoveSlovo
n9:dependence n9:afterglow n9:gas n9:dissociative%20recombination n9:spectroscopy n9:molecules n9:h-3%2B n9:plasma n9:d-3%28%2B%29%20ions n9:temperature
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[E3828E6DB6C2]
n3:nazevZdroje
Physical Review A - Atomic Molecular and Optical Physics
n3:obor
n19:BL
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
7
n3:projekt
n10:GP14-14649P n10:GAP209%2F12%2F0233
n3:rokUplatneniVysledku
n15:2014
n3:svazekPeriodika
90
n3:tvurceVysledku
Johnsen, Rainer Plašil, Radek Dohnal, Petr Kálosi, Ábel Hejduk, Michal Rubovič, Peter Glosík, Juraj
n3:wos
000343699100007
s:issn
1050-2947
s:numberOfPages
6
n20:doi
10.1103/PhysRevA.90.042708
n16:organizacniJednotka
11320