In-situ Determination of the Population of Nuclear Spin States of H2 Injected to the 22-Pole Trap
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10133141" target="_blank" >RIV/00216208:11320/12:10133141 - isvavai.cz</a>
Result on the web
<a href="http://www.mff.cuni.cz/veda/konference/wds/proc/pdf12/WDS12_205_f2_Hejduk.pdf" target="_blank" >http://www.mff.cuni.cz/veda/konference/wds/proc/pdf12/WDS12_205_f2_Hejduk.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
In-situ Determination of the Population of Nuclear Spin States of H2 Injected to the 22-Pole Trap
Original language 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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
WDS'12 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media
ISBN
978-80-7378-225-2
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
31-37
Publisher name
Matfyzpress
Place of publication
Praha
Event location
Praha
Event date
May 29, 2012
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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