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Production of the positron emitter 51Mn via the 50Cr(d, n) reaction: targetry and separation of no-carrier-added radiomanganese

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Published/Copyright: September 25, 2009
Radiochimica Acta
From the journal Radiochimica Acta Volume 90 Issue 3

Summary

In connection with the production of 46.2 min 51Mn via the 50Cr(d, n)-process, several separation techniques such as ion exchange chromatography, solid phase extraction, liquid–liquid extraction and co-precipitation have been investigated; the aim was to separate no-carrier-added radiomanganese from the bulk target chromium. Among the separation systems *MnII/CrIII, *MnII/CrVI and *MnIV/CrVI, the latter applying the co-precipitation of *MnIV with FeIII hydroxide was found to be the optimum; the removal of chromium was rapid and quantitative (remaining content <0.05%) and the separation efficiency was high (99.3% radiochemical yield of *Mn). For production purposes, a sandwiched pellet of the chemical composition Al4·50CrCl3 was developed as a new target. This allowed a quick dissolution after irradiation, thus enabling a fast separation of 51Mn and its production on a MBq scale. A 1 h irradiation at 3 µA (wobbled beam) over an effective deuteron energy range of Ed = 12.8 → 7.9 MeV yielded 107 MBq 51Mn. Simultaneously formed nuclides of other elements, such as 38Cl, 24Na, 48V and 51Cr were quantitatively separated using the proposed procedure. Only the shorter-lived radioisotope 52mMn, formed via the 52Cr(d, 2n)52mMn reaction, was present at a low level of 2%, if the enrichment of 50Cr was 95% (with ∼5% 52Cr).

Received: 2001-5-25
Accepted: 2001-8-21
Published Online: 2009-9-25
Published in Print: 2002-3-1

© Oldenbourg Wissenschaftsverlag, München

Articles in the same Issue

  1. Fission neutron spectrum averaged cross sections of some threshold reactions on titanium: production feasibility of 45Ti in a nuclear reactor
  2. Chemical isolation of dubnium (element 105) in fluoride media
  3. Direct separation of plutonium by thermochromatography from environmental samples
  4. Studies on the supercritical fluid extraction of uranium from tissue matrix
  5. Study of uranyl(VI) malonate complexation by time resolved laser-induced fluorescence spectroscopy (TRLFS)
  6. Adsorption of uranium on halloysite
  7. Studies on hydrolysis and radiolysis of N,N,N′,N′-tetraoctyl-3-oxapentane-1,5-diamide
  8. Production of the positron emitter 51Mn via the 50Cr(d, n) reaction: targetry and separation of no-carrier-added radiomanganese
  9. Chromatographic separation of lithium and magnesium isotopes by manganese(IV) oxide
https://doi.org/10.1524/ract.2002.90.3_2002.167

Articles in the same Issue

  1. Fission neutron spectrum averaged cross sections of some threshold reactions on titanium: production feasibility of 45Ti in a nuclear reactor
  2. Chemical isolation of dubnium (element 105) in fluoride media
  3. Direct separation of plutonium by thermochromatography from environmental samples
  4. Studies on the supercritical fluid extraction of uranium from tissue matrix
  5. Study of uranyl(VI) malonate complexation by time resolved laser-induced fluorescence spectroscopy (TRLFS)
  6. Adsorption of uranium on halloysite
  7. Studies on hydrolysis and radiolysis of N,N,N′,N′-tetraoctyl-3-oxapentane-1,5-diamide
  8. Production of the positron emitter 51Mn via the 50Cr(d, n) reaction: targetry and separation of no-carrier-added radiomanganese
  9. Chromatographic separation of lithium and magnesium isotopes by manganese(IV) oxide
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