Production, separation and target preparation of 171Tm and 147Pm for neutron cross section measurements
-
Stephan Heinitz
,
Emilio A. Maugeri
Abstract
The knowledge of the neutron capture cross sections of s-process branching point isotopes represents a basic requirement for the understanding of star evolution. Since such branching point isotopes are by definition radioactive, the measurement of their cross sections from thermal to stellar energies becomes a challenging task. Considerable amounts of material have to be produced, representing a significant radioactive hazard. We report here on the production and separation of 3.5 mg 171Tm from 240 mg 170Er2O3 and 72 μg 147Pm from 100 mg 146Nd2O3 irradiated at the ILL high flux reactor. Thin targets were prepared with high chemical and radioisotopic purity suitable for neutron capture measurements at n_TOF CERN and the SARAF-LiLiT facility.
Acknowledgments
The authors are grateful to A. Vögele in performing neutron activation of various lanthanide samples during this work. Advices and help of E. Schaub and H. Dorrer during planning and construction of the separation setup are highly appreciated. This measurement has received funding from the EC FP7 Program under the projects NEUTANDALUS (Grant No. 334315) and CHANDA (Grant No. 605203).
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Activation cross section and isomeric cross-section ratio for the (n,2n) reaction on 132,134Ba
- Measurement of photo-neutron cross sections and isomeric yield ratios in the 89Y(γ,xn)89−x Y reactions at the bremsstrahlung end-point energies of 65, 70 and 75 MeV
- Production, separation and target preparation of 171Tm and 147Pm for neutron cross section measurements
- Solid phase extraction of uranium from phosphoric acid: kinetic and thermodynamic study
- Natural silica sand modified by calcium oxide as a new adsorbent for uranyl ions removal from aqueous solutions
- Radiochemical separation of 231Pa from siliceous cake prior to its determination by gamma ray spectrometry
- Investigation of selenium compounds as targets for 76,77Br production using protons of energies up to 34 MeV
- Attenuation properties of radiation shielding materials such as granite and marble against γ-ray energies between 80 and 1350 keV
- Controlled release fertilizers using superabsorbent hydrogel prepared by gamma radiation
Artikel in diesem Heft
- Frontmatter
- Activation cross section and isomeric cross-section ratio for the (n,2n) reaction on 132,134Ba
- Measurement of photo-neutron cross sections and isomeric yield ratios in the 89Y(γ,xn)89−x Y reactions at the bremsstrahlung end-point energies of 65, 70 and 75 MeV
- Production, separation and target preparation of 171Tm and 147Pm for neutron cross section measurements
- Solid phase extraction of uranium from phosphoric acid: kinetic and thermodynamic study
- Natural silica sand modified by calcium oxide as a new adsorbent for uranyl ions removal from aqueous solutions
- Radiochemical separation of 231Pa from siliceous cake prior to its determination by gamma ray spectrometry
- Investigation of selenium compounds as targets for 76,77Br production using protons of energies up to 34 MeV
- Attenuation properties of radiation shielding materials such as granite and marble against γ-ray energies between 80 and 1350 keV
- Controlled release fertilizers using superabsorbent hydrogel prepared by gamma radiation
