<p>Carrier-free <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="36" /> </InlineMediaObject> <EquationSource Format="TEX">${^{202}\textrm{Tl}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mn>202</mn> </mmultiscripts> <mtext>Tl</mtext> </mrow> </math></EquationSource> </InlineEquation> was thermally separated from proton-irradiated <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="52" /> </InlineMediaObject> <EquationSource Format="TEX">${^\textrm{nat}\textrm{HgO}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mtext>nat</mtext> </mmultiscripts> <mtext>HgO</mtext> </mrow> </math></EquationSource> </InlineEquation>. Pressed <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="52" /> </InlineMediaObject> <EquationSource Format="TEX">${^\textrm{nat}\textrm{HgO}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mtext>nat</mtext> </mmultiscripts> <mtext>HgO</mtext> </mrow> </math></EquationSource> </InlineEquation> targets were irradiated with <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq6.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="71" /> </InlineMediaObject> <EquationSource Format="TEX">$\approx {26}\,\textrm{MeV}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>≈</mo> <mn>26</mn> <mspace width="0.166667em" /> <mtext>MeV</mtext> </mrow> </math></EquationSource> </InlineEquation> protons at the IP2 beamline of the high-intensity proton accelerator facility at the Paul Scherrer Institute. The well-known thermal decomposition of <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq7.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="35" /> </InlineMediaObject> <EquationSource Format="TEX">$\textrm{HgO}$</EquationSource> <EquationSource Format="MATHML"><math> <mtext>HgO</mtext> </math></EquationSource> </InlineEquation> at <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq8.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="53" /> </InlineMediaObject> <EquationSource Format="TEX">$>{470}\,^\circ$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>></mo> <mn>470</mn> <mmultiscripts> <mspace width="0.166667em" /> <mrow /> <mo>∘</mo> </mmultiscripts> </mrow> </math></EquationSource> </InlineEquation>C and the strong adsorption of <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq9.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">$\textrm{Tl}$</EquationSource> <EquationSource Format="MATHML"><math> <mtext>Tl</mtext> </math></EquationSource> </InlineEquation> on a <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq10.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="TEX">$\textrm{Ta}$</EquationSource> <EquationSource Format="MATHML"><math> <mtext>Ta</mtext> </math></EquationSource> </InlineEquation> surface allowed for a simple and quantitative gas-phase separation of carrier-free <InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq9.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">$\textrm{Tl}$</EquationSource> <EquationSource Format="MATHML"><math> <mtext>Tl</mtext> </math></EquationSource> </InlineEquation> from bulk amounts of <InlineEquation ID="IEq12"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq7.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="35" /> </InlineMediaObject> <EquationSource Format="TEX">$\textrm{HgO}$</EquationSource> <EquationSource Format="MATHML"><math> <mtext>HgO</mtext> </math></EquationSource> </InlineEquation> target material between 550 and <InlineEquation ID="IEq13"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq13.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="36" /> </InlineMediaObject> <EquationSource Format="TEX">${670}\,^\circ$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>670</mn> <mmultiscripts> <mspace width="0.166667em" /> <mrow /> <mo>∘</mo> </mmultiscripts> </mrow> </math></EquationSource> </InlineEquation>°C. The separation efficiency was verified by <InlineEquation ID="IEq14"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq14.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>-spectroscopy <i>via</i> the main <InlineEquation ID="IEq15"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq14.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>-emissions of <InlineEquation ID="IEq16"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="36" /> </InlineMediaObject> <EquationSource Format="TEX">${^{202}\textrm{Tl}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mn>202</mn> </mmultiscripts> <mtext>Tl</mtext> </mrow> </math></EquationSource> </InlineEquation> and co-produced <InlineEquation ID="IEq17"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq17.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="40" /> </InlineMediaObject> <EquationSource Format="TEX">${^{203}\textrm{Hg}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mn>203</mn> </mmultiscripts> <mtext>Hg</mtext> </mrow> </math></EquationSource> </InlineEquation>. This method generally provides a fast and reliable preparation of carrier-free, neutron-deficient <InlineEquation ID="IEq18"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq9.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">$\textrm{Tl}$</EquationSource> <EquationSource Format="MATHML"><math> <mtext>Tl</mtext> </math></EquationSource> </InlineEquation> radioisotopes (e.g., medically relevant <InlineEquation ID="IEq19"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq19.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="36" /> </InlineMediaObject> <EquationSource Format="TEX">${^{201}\textrm{Tl}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mn>201</mn> </mmultiscripts> <mtext>Tl</mtext> </mrow> </math></EquationSource> </InlineEquation>) from a proton-irradiated <InlineEquation ID="IEq20"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10967_2025_10125_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="52" /> </InlineMediaObject> <EquationSource Format="TEX">${^\textrm{nat}\textrm{HgO}}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow /> <mtext>nat</mtext> </mmultiscripts> <mtext>HgO</mtext> </mrow> </math></EquationSource> </InlineEquation> matrix.</p>

Quantitative gas-phase separation of carrier-free thallium radioisotopes from proton-irradiated ${^\textrm{nat}\textrm{HgO}}$

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2025年5月7日

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Jennifer M. Wilson,
Dominik Herrmann,
Pascal V. Grundler,
Nicholas P. van der Meulen,
Alexander Sommerhalder,
Patrick Steinegger

摘要

Carrier-free ${^{202}\textrm{Tl}}$ $^{202} Tl$ was thermally separated from proton-irradiated ${^\textrm{nat}\textrm{HgO}}$ $^{nat} HgO$ . Pressed ${^\textrm{nat}\textrm{HgO}}$ $^{nat} HgO$ targets were irradiated with $\approx {26}\,\textrm{MeV}$ $\approx 26 MeV$ protons at the IP2 beamline of the high-intensity proton accelerator facility at the Paul Scherrer Institute. The well-known thermal decomposition of $\textrm{HgO}$ $HgO$ at $>{470}\,^\circ$ $> 470^{\circ}$ C and the strong adsorption of $\textrm{Tl}$ $Tl$ on a $\textrm{Ta}$ $Ta$ surface allowed for a simple and quantitative gas-phase separation of carrier-free $\textrm{Tl}$ $Tl$ from bulk amounts of $\textrm{HgO}$ $HgO$ target material between 550 and ${670}\,^\circ$ $670^{\circ}$ °C. The separation efficiency was verified by $\gamma$ $γ$ -spectroscopy via the main $\gamma$ $γ$ -emissions of ${^{202}\textrm{Tl}}$ $^{202} Tl$ and co-produced ${^{203}\textrm{Hg}}$ $^{203} Hg$ . This method generally provides a fast and reliable preparation of carrier-free, neutron-deficient $\textrm{Tl}$ $Tl$ radioisotopes (e.g., medically relevant ${^{201}\textrm{Tl}}$ $^{201} Tl$ ) from a proton-irradiated ${^\textrm{nat}\textrm{HgO}}$ $^{nat} HgO$ matrix.

Quantitative gas-phase separation of carrier-free thallium radioisotopes from proton-irradiated \({^\textrm{nat}\textrm{HgO}}\)

摘要