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Laboratory astrophysics: Formation and recombination of astrophysically relevant ions.

Project goals

The experimental study of collisional processes pertinent to formation and destruction of astrophysically relevant ions is the main aim of the proposed project. It is proposed to study participation of ions H3+and D3+ (and partly also H2D+ and D2H+) in these processes. The research will be concentrated on recombination of H3+ ions in vibrational groundstate and in lowest rotational state (J=1, K=1) and in the next lowest state (J=1, K=0), para-H3+ and ortho-H3+, respectively. The goal of the study is torationalize role of rotational excitation of H3+ ions in low temperature hydrogen containing plasma at conditions relevant to astrophysics. It is proposed to study ion-molecule reactions leading to formation of para-H3+ and ortho-H3+, respectively. Therate coefficients of recombination of para and ortho-H3+ with electrons will be measured using Stationary afterglow (SA) and Flowing afterglow (FALP) techniques adapted for measurements at low plasma temperatures and equipped with near infrared laser absorption spectroscopy (NIR-CRDS configuration)

Keywords

H3+paraorthorecombinationinterstellarclouds

Public support

  • Provider

    Czech Science Foundation

  • Programme

    Standard projects

  • Call for proposals

    Standardní projekty 12 (SGA02009GA-ST)

  • Main participants

  • Contest type

    VS - Public tender

  • Contract ID

    205-09-1183

Alternative language

  • Project name in Czech

    Laboratorní astrofyzika : Formování a rekombinace astrofyzikálně relevantních iontů.

  • Annotation in Czech

    Hlavním cílem projektu je experimentální studium procesů tvorby a zániku astrofyzikálně důležitých iontů. Je navrhováno studium procesů, ve kterých se zúčastňují ionty H3+ a D3+ (a částečně též studium iontů H2D+ a D2H+). Výzkum bude zaměřen na rekombinaci iontů H3+ v základním vibračním stavu a nejnižším rotačním stavu (J=1, K=1) a též v dalším vyšším rotačním stavu (J=1, K=0); stavy označované jako para-H3+ a ortho-H3+. Cílem studia je ozřejmění role rotační excitace iontů H3+ ve vodíkovém plazmatu vpodmínkách relevantních pro astrofyziku. Navrhováno je i studium reakcí vedoucích k tvorbě iontů para-H3+ a ortho-H3+. Rychlostní konstanty rekombinace budou měřeny na aparaturách ?Stationary afterglow? (SA - stacionární dohasínající plazma) a ?Flowing afterglow? (FALP - proudící dohasínající plazma) upravenými pro dané měření a doplněnými o laserovou absorpční spektroskopii v blízké infračervené oblasti (v konfiguraci NIR-CRDS).

Scientific branches

  • R&D category

    ZV - Basic research

  • CEP classification - main branch

    BN - Astronomy and celestial mechanics, astrophysics

  • CEP - secondary branch

    BL - Plasma physics and discharge through gases

  • CEP - another secondary branch

    BG - Nuclear, atomic and molecular physics, accelerators

  • 10304 - Nuclear physics
    10305 - Fluids and plasma physics (including surface physics)
    10308 - Astronomy (including astrophysics,space science)

Completed project evaluation

  • Provider evaluation

    V - Vynikající výsledky projektu (s mezinárodním významem atd.)

  • Project results evaluation

    Internationally important results were reached, in particular, a new process of H3+ and D3+ ions recombination was discovered. Results are well described and in agreement with the proposal. Many students participated on the project. Results were published in more than 20 papers and were already cited more than 50 times. No management problems were found.

Solution timeline

  • Realization period - beginning

    Jan 1, 2009

  • Realization period - end

    Dec 31, 2013

  • Project status

    U - Finished project

  • Latest support payment

    Jun 12, 2013

Data delivery to CEP

  • Confidentiality

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

  • Data delivery code

    CEP14-GA0-GA-U/01:1

  • Data delivery date

    Jul 1, 2014

Finance

  • Total approved costs

    2,750 thou. CZK

  • Public financial support

    2,750 thou. CZK

  • Other public sources

    0 thou. CZK

  • Non public and foreign sources

    0 thou. CZK