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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F12%3A10130596%21RIV13-GA0-11320___
rdf:type
n9:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1088/0004-637X/749/1/22
dcterms:description
Thermal rate coefficients for forming H-2 via associative detachment in H- + H collisions were determined using the combination of a 22-pole ion trap (22PT) with a skimmed effusive beam of atomic hydrogen penetrating the ion cloud. The temperature of both reactants have been varied independently (ion trap: T-22PT = 10-150 K, neutral beam accommodator T-ACC = 10, 50, 120 K). Using various combinations, the temperature range between 10 and 135 K has been accessed for the first time experimentally. The effective number density of H (typically some 10(8) cm(-3)) is determined in situ via chemical probing with CO2+ ions. With decreasing temperature, the measured thermal rate coefficients decrease slowly from 5.5 x 10(-9) cm(3) s(-1) at 135 K to 4.1 x 10(-9) cm(3) s(-1) at 10 K. The relative error is 10%, while the absolute values may deviate systematically by up to 40%, due to uncertainties in the calibration reaction. Significant improvements of the versatile and sensitive experiment are possible, e. g., by using electron transfer from H to D+ as calibration standard. Thermal rate coefficients for forming H-2 via associative detachment in H- + H collisions were determined using the combination of a 22-pole ion trap (22PT) with a skimmed effusive beam of atomic hydrogen penetrating the ion cloud. The temperature of both reactants have been varied independently (ion trap: T-22PT = 10-150 K, neutral beam accommodator T-ACC = 10, 50, 120 K). Using various combinations, the temperature range between 10 and 135 K has been accessed for the first time experimentally. The effective number density of H (typically some 10(8) cm(-3)) is determined in situ via chemical probing with CO2+ ions. With decreasing temperature, the measured thermal rate coefficients decrease slowly from 5.5 x 10(-9) cm(3) s(-1) at 135 K to 4.1 x 10(-9) cm(3) s(-1) at 10 K. The relative error is 10%, while the absolute values may deviate systematically by up to 40%, due to uncertainties in the calibration reaction. Significant improvements of the versatile and sensitive experiment are possible, e. g., by using electron transfer from H to D+ as calibration standard.
dcterms:title
ION TRAP STUDIES OF H- + H -> H-2 + e(-) BETWEEN 10 AND 135 K ION TRAP STUDIES OF H- + H -> H-2 + e(-) BETWEEN 10 AND 135 K
skos:prefLabel
ION TRAP STUDIES OF H- + H -> H-2 + e(-) BETWEEN 10 AND 135 K ION TRAP STUDIES OF H- + H -> H-2 + e(-) BETWEEN 10 AND 135 K
skos:notation
RIV/00216208:11320/12:10130596!RIV13-GA0-11320___
n9:predkladatel
n10:orjk%3A11320
n3:aktivita
n16:Z n16:S n16:P
n3:aktivity
P(GA202/07/0495), P(GA202/09/0642), P(GA205/09/1183), P(GAP209/12/0233), P(OC10046), S, Z(MSM0021620834)
n3:cisloPeriodika
1
n3:dodaniDat
n17:2013
n3:domaciTvurceVysledku
n6:6512895 n6:9707700 n6:9667334 Gerlich, Dieter Zymak, Illia n6:2913623
n3:druhVysledku
n21:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
142990
n3:idVysledku
RIV/00216208:11320/12:10130596
n3:jazykVysledku
n8:eng
n3:klicovaSlova
molecular processes; methods: laboratory; early Universe; atomic processes; astrochemistry
n3:klicoveSlovo
n5:molecular%20processes n5:early%20Universe n5:astrochemistry n5:atomic%20processes n5:methods%3A%20laboratory
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[0BD0B673E19A]
n3:nazevZdroje
Astrophysical Journal
n3:obor
n12:BL
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
6
n3:projekt
n7:GA205%2F09%2F1183 n7:GAP209%2F12%2F0233 n7:GA202%2F09%2F0642 n7:GA202%2F07%2F0495 n7:OC10046
n3:rokUplatneniVysledku
n17:2012
n3:svazekPeriodika
749
n3:tvurceVysledku
Glosík, Juraj Plašil, Radek Zymak, Illia Jusko, Pavol Gerlich, Dieter Roučka, Štěpán
n3:wos
000302175500022
n3:zamer
n18:MSM0021620834
s:issn
0004-637X
s:numberOfPages
6
n20:doi
10.1088/0004-637X/749/1/22
n19:organizacniJednotka
11320