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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F12%3A10133141%21RIV13-GA0-11320___
rdf:type
skos:Concept n14:Vysledek
rdfs:seeAlso
http://www.mff.cuni.cz/veda/konference/wds/proc/pdf12/WDS12_205_f2_Hejduk.pdf
dcterms:description
We evaluate a population of ortho nuclear spin states in H2 gas in the 22-pole linear radio-frequency trap using N+ ions as a chemical probe. The rate coefficient of the reaction N+ + H2 -> NH+ + H strongly depends on the nuclear spin states of the H2 molecules at the temperature 11 K. To achieve astrophysically relevant conditions in other our experiments, we convert the normal H2 gas (25% of the molecules in para-states) to H2 gas with a distribution of the nuclear spin states corresponding to the temperatures in prestellar cores (> 99 % in para-states at temperatures 20 K) by a catalytic converter (para-hydrogen generator). Tests by the aforementioned probing reaction show that the abundance of ortho-H2 in such H2 gas is (0:5 0:2)% in the trap. Para-to-ortho back-conversion of H2 gas in the generator's outlet tube was studied and its rate was estimated to lie in the interval (10-4; 10-2)s-1. We evaluate a population of ortho nuclear spin states in H2 gas in the 22-pole linear radio-frequency trap using N+ ions as a chemical probe. The rate coefficient of the reaction N+ + H2 -> NH+ + H strongly depends on the nuclear spin states of the H2 molecules at the temperature 11 K. To achieve astrophysically relevant conditions in other our experiments, we convert the normal H2 gas (25% of the molecules in para-states) to H2 gas with a distribution of the nuclear spin states corresponding to the temperatures in prestellar cores (> 99 % in para-states at temperatures 20 K) by a catalytic converter (para-hydrogen generator). Tests by the aforementioned probing reaction show that the abundance of ortho-H2 in such H2 gas is (0:5 0:2)% in the trap. Para-to-ortho back-conversion of H2 gas in the generator's outlet tube was studied and its rate was estimated to lie in the interval (10-4; 10-2)s-1.
dcterms:title
In-situ Determination of the Population of Nuclear Spin States of H2 Injected to the 22-Pole Trap In-situ Determination of the Population of Nuclear Spin States of H2 Injected to the 22-Pole Trap
skos:prefLabel
In-situ Determination of the Population of Nuclear Spin States of H2 Injected to the 22-Pole Trap In-situ Determination of the Population of Nuclear Spin States of H2 Injected to the 22-Pole Trap
skos:notation
RIV/00216208:11320/12:10133141!RIV13-GA0-11320___
n14:predkladatel
n15:orjk%3A11320
n3:aktivita
n20:S n20:P
n3:aktivity
P(GA205/09/1183), P(GAP209/12/0233), P(OC10046), S
n3:dodaniDat
n16:2013
n3:domaciTvurceVysledku
n6:9667334 Zymak, Illia n6:8133824 Mulin, Dmytro n6:2913623 Gerlich, Dieter
n3:druhVysledku
n5:D
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
142011
n3:idVysledku
RIV/00216208:11320/12:10133141
n3:jazykVysledku
n23:eng
n3:klicovaSlova
22-pole trap; Nuclear spin states
n3:klicoveSlovo
n9:Nuclear%20spin%20states n9:22-pole%20trap
n3:kontrolniKodProRIV
[E8F75150F5E3]
n3:mistoKonaniAkce
Praha
n3:mistoVydani
Praha
n3:nazevZdroje
WDS'12 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media
n3:obor
n21:BL
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
7
n3:projekt
n7:GA205%2F09%2F1183 n7:GAP209%2F12%2F0233 n7:OC10046
n3:rokUplatneniVysledku
n16:2012
n3:tvurceVysledku
Mulin, Dmytro Gerlich, Dieter Gartner, S. Zymak, Illia Hejduk, Michal Glosík, Juraj Plašil, Radek
n3:typAkce
n10:EUR
n3:zahajeniAkce
2012-05-29+02:00
s:numberOfPages
7
n22:hasPublisher
Matfyzpress
n18:isbn
978-80-7378-225-2
n19:organizacniJednotka
11320