Epithermal neutron beam dosimetry with thermoluminescence dosemeters for boron neutron capture therapy

Carita Aschan, Mika Toivonen, Sauli Savolainen, Tiina Seppälä, Iiro Auterinen

    Research output: Contribution to journalArticleScientificpeer-review

    23 Citations (Scopus)

    Abstract

    The characteristics of thermoluminescence (TL) dosemeters were investigated for the determination of dose components in tissue substitute phantoms irradiated with an epithermal neutron beam for boron neutron capture therapy (BNCT). New two-layer TL detectors of a Dosimeter Niewiadomski were tested for neutron and gamma detection: MTS-Ns with a thin active LiF:Mg,Ti layer for reduced self-shielding of thermal neutrons and MCP-7s (7LiF:Mg,Cu,P) with low sensitivity for neutrons compared with gamma radiation. For comparison the conventional TLD-100 and TLD-700 detectors of Harshaw were used. MCP-7s dosemeters were found to be less sensitive for thermal neutrons and therefore better than TLD-700. However, the thermal neutron sensitivity of MCP-7s dosemeters is relatively high, e.g. the correction factor for the excess TL signal above the gamma signal is ~0.5 at the depth of the thermal neutron fluence maximum. MTS-Ns TL dosemeters were found capable of measuring the relative neutron fluence and to be a useful addition to the activation foils in BNCT neutron dosimetry.
    Original languageEnglish
    Pages (from-to)47-56
    Number of pages10
    JournalRadiation Protection Dosimetry
    Volume81
    Issue number1
    DOIs
    Publication statusPublished - 1999
    MoE publication typeA1 Journal article-refereed

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