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Reaction of NH+, NH2+, and NH3+ ions with H-2 at low temperatures The pathway to ammonia production in the interstellar medium

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10395967" target="_blank" >RIV/00216208:11320/19:10395967 - isvavai.cz</a>

  • Result on the web

    <a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=THnSZc8DeG" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=THnSZc8DeG</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1051/0004-6361/201834149" target="_blank" >10.1051/0004-6361/201834149</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Reaction of NH+, NH2+, and NH3+ ions with H-2 at low temperatures The pathway to ammonia production in the interstellar medium

  • Original language description

    Aims. We present an experimental investigation of the exothermic reactions of NH+, NH2+, and NH3+ ions with H-2 at temperatures relevant for interstellar clouds. Methods. The reactions were studied using a variable-temperature 22-pole radio frequency ion trap instrument. Results. The temperature dependences of rate coefficients of these reactions have been obtained at temperatures from 15 up to 300 K. The reaction of NH+ with H-2 has two channels, which lead to NH2+ (similar to 97%) and H-3(+)(similar to 3%) with nearly constant reaction rate coefficients (k(NH+)(a) (17 K) = 1.0 x 10(-9) cm(3) s(-1) and k(NH+)(b) (17 K) = 4.0 x 10(-11) cm(3) s(-1), respectively). The reaction of NH2+ with H-2 produces only NH3+ ions. The measured rate coefficient monotonically decreases with increasing temperature from k(NH+2) (17 K) = 6 x 10(-10) cm(3) s(-1) to k(NH +2) (300 K) = 2 x 10(-10) cm(3) s(-1). The measured rate coefficient of the reaction of NH3+ with H-2, producing NH4+, increases with decreasing temperature from 80K down to 15 K, confirming that the reaction proceeds by tunnelling through a potential barrier.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

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)

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Astronomy &amp; Astrophysics [online]

  • ISSN

    1432-0746

  • e-ISSN

  • Volume of the periodical

    625

  • Issue of the periodical within the volume

    May

  • Country of publishing house

    FR - FRANCE

  • Number of pages

    8

  • Pages from-to

    A74

  • UT code for WoS article

    000468015700003

  • EID of the result in the Scopus database

    2-s2.0-85071235213