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J. Aaltonen, P. Dendooven, E. A. Gromova, S.-J. Heselius, V. A. Jakovlev, W. H. Trzaska

Production of ²³⁵Np, ²³⁶Pu and ²³⁷Pu via nuclear reactions on ^235,236,238U and ²³⁷Np targets

A summary of methods for cyclotron production of ²³⁵Np (396.1d), ²³⁶Pu (2.858y) and ²³⁷Pu (45.2d) via nuclear reactions with protons and ³He-ions on ^235,236,238U and ²³⁷Np targets in wide energy ranges is given. Methods for the chemical separation and purification of these nuclides from the irradiated uranium and neptunium targets are described. Cross sections, yields and radionuclidic purities of ²³⁵Np, ²³⁶Pu and ²³⁷Pu are presented and compared with literature data on the nuclear reactions leading to these radionuclides. The nuclear reactions with the so far highest known yields of ²³⁵Np, ²³⁶Pu and ²³⁷Pu are determined: ²³⁶U(p,2n) ²³⁵Np, ²³⁷Np(p,2n+pnβ^-) ²³⁶Pu and ²³⁷Np(p,n) ²³⁷Pu, respectively. The highest radionuclidic purity of ²³⁵Np, ²³⁶Pu and ²³⁷Pu tracers can be reached with the ²³⁶U(p,2n) ²³⁵Np, ²³⁶U(p,nβ^-) ²³⁶Pu and ²³⁷Np(³He,t) ²³⁷Pu reactions, respectively. In addition new cross sections and yield data of the ²³⁶U(³He,p3n) ²³⁵Np reaction in the energy range 42.4–60 MeV are given.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 91, 10/2003
Pages: 557

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