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Activation Analysis of Tibetan Coins and Thermal Neutron Flux Measurement at the VR-1 Training Reactor

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00320242" target="_blank" >RIV/68407700:21340/19:00320242 - isvavai.cz</a>

  • Výsledek na webu

    <a href="https://doi.org/10.1016/j.radphyschem.2018.06.032" target="_blank" >https://doi.org/10.1016/j.radphyschem.2018.06.032</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.radphyschem.2018.06.032" target="_blank" >10.1016/j.radphyschem.2018.06.032</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Activation Analysis of Tibetan Coins and Thermal Neutron Flux Measurement at the VR-1 Training Reactor

  • Popis výsledku v původním jazyce

    The VR-1 training reactor of Czech Technical University in Prague serves mostly to train students; however, owing to the presence of the experimental channels, it can be utilized for particular research tasks such as irradiation experiments, neutron radiography, and neutron activation analysis (NAA). Within the presented experiments, eight samples of historical Tibetan coins were irradiated in the experimental channel at maximum power, and the amount of the copper, silver, gold, and zinc was investigated using the NAA. The irradiated samples were repeatedly measured by the calibrated semiconductor HPGe detector; saturated activities were obtained by means of the gamma-ray spectrometry, and subsequently the composition of the samples was determined. In investigated Tibetan coins, the determined concentration of silver ranged from 47.9% to 54.5%, concentration of copper ranged from 13.5% to 99.3%, concentration of zinc ranged from 0.6% to 4.0%, and abundance of gold was 0.03-0.2%. Moreover, the activation measurement of neutron field parameters using the dosimetry foils was performed, and the reaction rates in the vertical experimental channel were determined utilizing the bare and cadmium covered gold foils. Afterwards, the thermal neutron flux for the relevant position was extracted employing the Westcott formalism and activation cross-section from the ENDF/B-VII.1 database. The results presented in this paper show clearly that the low-power VR-1 training reactor (ca. 80 W) is suitable for the neutron activation analysis of historical samples containing the noble metals.

  • Název v anglickém jazyce

    Activation Analysis of Tibetan Coins and Thermal Neutron Flux Measurement at the VR-1 Training Reactor

  • Popis výsledku anglicky

    The VR-1 training reactor of Czech Technical University in Prague serves mostly to train students; however, owing to the presence of the experimental channels, it can be utilized for particular research tasks such as irradiation experiments, neutron radiography, and neutron activation analysis (NAA). Within the presented experiments, eight samples of historical Tibetan coins were irradiated in the experimental channel at maximum power, and the amount of the copper, silver, gold, and zinc was investigated using the NAA. The irradiated samples were repeatedly measured by the calibrated semiconductor HPGe detector; saturated activities were obtained by means of the gamma-ray spectrometry, and subsequently the composition of the samples was determined. In investigated Tibetan coins, the determined concentration of silver ranged from 47.9% to 54.5%, concentration of copper ranged from 13.5% to 99.3%, concentration of zinc ranged from 0.6% to 4.0%, and abundance of gold was 0.03-0.2%. Moreover, the activation measurement of neutron field parameters using the dosimetry foils was performed, and the reaction rates in the vertical experimental channel were determined utilizing the bare and cadmium covered gold foils. Afterwards, the thermal neutron flux for the relevant position was extracted employing the Westcott formalism and activation cross-section from the ENDF/B-VII.1 database. The results presented in this paper show clearly that the low-power VR-1 training reactor (ca. 80 W) is suitable for the neutron activation analysis of historical samples containing the noble metals.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/LM2015053" target="_blank" >LM2015053: VR-1 – Školní reaktor pro výzkumnou činnost</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Ostatní

  • Rok uplatnění

    2019

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Radiation Physics and Chemistry

  • ISSN

    0969-806X

  • e-ISSN

    1879-0895

  • Svazek periodika

    155

  • Číslo periodika v rámci svazku

    Feb

  • Stát vydavatele periodika

    GB - Spojené království Velké Británie a Severního Irska

  • Počet stran výsledku

    6

  • Strana od-do

    304-309

  • Kód UT WoS článku

    000454467400056

  • EID výsledku v databázi Scopus

    2-s2.0-85049060607