Simulations of the fission-product stopping efficiency in IGISOL
2015 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 51, no 59, 1-7 p.Article in journal (Refereed) Published
At the Jyväskylä Ion Guide Isotope Separator On-Line (IGISOL) facility, independent fission yields are measured employing the Penning-trap technique. Fission products are produced, e.g. by impinging protons on a uranium target, and are stopped in a gas-filled chamber. The products are collected by a flow of He gas and guided through a mass separator to a Penning trap, where their masses are identified. This work investigates how fission-product properties, such as mass and energy, affect the ion stopping efficiency in the gas cell. The study was performed using the Geant4 toolkit and the SRIM code. The main results show a nearly mass-independent ion stopping with regard to the wide spread of ion masses and energies, with a proper choice of uranium target thickness. Although small variations were observed, in the order of 5%, the results are within the systematic uncertainties of the simulations. To optimize the stopping efficiency while reducing the systematic errors, different experimental parameters were varied; for instance material thicknesses and He gas pressure. Different parameters influence the mass dependence and could alter the mass dependencies in the ion stopping efficiency.
Place, publisher, year, edition, pages
2015. Vol. 51, no 59, 1-7 p.
IGISOL, FISSION, SIMULATION
Research subject Physics with specialization in Nuclear Physics
IdentifiersURN: urn:nbn:se:uu:diva-253182DOI: 10.1140/epja/i2015-15059-2ISI: 000361121800001OAI: oai:DiVA.org:uu-253182DiVA: diva2:813594
FunderSwedish Radiation Safety Authority