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Analytics and separation of long-lived radionuclides produced by proton irradiation in lead targets - ASPIT -

Applicant Schumann Dorothea
Number 149217
Funding scheme Project funding
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Inorganic Chemistry
Start/End 01.01.2014 - 31.12.2014
Approved amount 71'546.00
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All Disciplines (2)

Inorganic Chemistry
Nuclear Physics

Keywords (4)

Lead target; Radiochemistry; Radionuclide inventory; Proton accelerator

Lay Summary (German)

Das aktuelle Forschungsvorhaben ist eine Fortsetzung des SNF-Projekts No 200021_129588, in dem wir das Radionuklidinventar und die räumliche Verteilung eines mit Protonen bestrahlten Bleitargets der Spallationsneutronenanlage SINQ des PSI untersuchen.
Lay summary

Inhalt und Ziel des Forschungsprojekts 

Nachdem wir in den vergangenen 3 Jahren den Radionuklidgehalt von Proben rechtwinklig zur Strahlrichtung bestimmt haben, wollen wir nun Proben untersuchen, die in Richtung des Strahls genommen wurden. Die Ergebnisse werden uns eine dreidimensionale Darstellung der Radionuklidverteilung im Target ermöglichen. 


Wissenschaftlicher und gesellschaftlicher Kontext des Projekts 

Die Ergebnisse liefern einen Beitrag zur Beurteilung der Sicherheit bei der Entsorgung radioaktiver Targets. Darüber hinaus unterstützen wir mit unseren experimentellen Daten die Entwicklung von Rechencodes zu theoretischen Vorhersagen der zu erwartenden Radioaktivität. 



Direct link to Lay Summary Last update: 26.09.2013

Responsible applicant and co-applicants


Name Institute


Proton-induced Polonium production in Lead, Nuclear Data Sheets
Lorenz Tobias, Dai Yong, Schumann Dorothea, Türler Andreas (2014), Proton-induced Polonium production in Lead, Nuclear Data Sheets, in Nuclear Data Sheets, 119, 284.


Group / person Country
Types of collaboration
CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Associated projects

Number Title Start Funding scheme
159738 Exotic Radionuclides from Accelerator Waste for Science and Technology - ERAWAST 01.05.2015 Project funding
177229 Towards implementing new isotopes for environmental research: The half-life of 32Si 01.09.2018 Sinergia
129588 Analytics and separation of long-lived radionuclides produced by proton irradiation in lead targets 01.01.2011 Project funding


The present proposal is a continuation of the SNSF-funded project No 200021_129588, which has the objective to determine the radionuclide inventory of a proton-irradiated lead target from the PSI SINQ facility. The radioactivity content of such a target shall be investigated concerning the total amount of safety-relevant radionuclides and their distribution within the target. The results shall be compared with theoretical predictions. Additionally, separation techniques shall be developed for rare exotic radionuclides, which might be applicable in scientific experiments, mainly in the field of nuclear astrophysics.After completing the tasks with samples from one rod of the target 4, we obtained results in dependence on distance of the beam entrance. We would now like to complete the analysis with samples coming from rods taken in beam direction, in order to calculate the spherical distribution of the isotopes. From the sum of these values we can calculate the total amount of radionuclides within the entire target (not including structure material). These results shall be compared with theoretical predictions obtained by using the present models and codes, as well as improvements of the calculations in collaboration with a French group of theoreticians.We apply for support of the PhD student Tobias Lorenz for one year and for a three-months-financing of a technician for the Hotcell work.