Hashemi-Nezhad, S. R. ; Zamani-Valasiadou, M. ; Krivopustov, M. I. ; Brandt, R. ; Ensinger, Wolfgang ; Odoj, R. ; Westmeier, W. (2011)
Neutron Production in Thick Targets Irradiated with High-Energy Ions.
In: Physics Research International, 2011
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The neutron production in thick targets irradiated with 1 GeV protons was studied experimentally, and results are well understood with model calculations, including MCNPX 2.7a. However, one observes very large neutron production rates in the interaction of 44 GeV 12C onto thick Cu-, Pb-, and U-targets beyond calculated rates. The experimental spallation product yield curve in a 20 cm thick Cu target irradiated with 72 GeV 40Ar also cannot be reproduced by several model codes, including MCNPX 2.7a. This may be due to secondary fragments produced in high energy (Ekinetic > 10 GeV) heavy-ion interactions which destroy target nuclei more effectively than primary ions. These observed experimental facts constitute “unresolved problems” from a fundamental point of view. It may have an impact on radiation protection issues for future heavy-ion accelerators.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Hashemi-Nezhad, S. R. ; Zamani-Valasiadou, M. ; Krivopustov, M. I. ; Brandt, R. ; Ensinger, Wolfgang ; Odoj, R. ; Westmeier, W. |
| Art des Eintrags: | Bibliographie |
| Titel: | Neutron Production in Thick Targets Irradiated with High-Energy Ions |
| Sprache: | Englisch |
| Publikationsjahr: | 2011 |
| Verlag: | Hindawi Publishing Corporation |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physics Research International |
| Jahrgang/Volume einer Zeitschrift: | 2011 |
| URL / URN: | http://dx.doi.org/10.1155/2011/128429 |
| Kurzbeschreibung (Abstract): | The neutron production in thick targets irradiated with 1 GeV protons was studied experimentally, and results are well understood with model calculations, including MCNPX 2.7a. However, one observes very large neutron production rates in the interaction of 44 GeV 12C onto thick Cu-, Pb-, and U-targets beyond calculated rates. The experimental spallation product yield curve in a 20 cm thick Cu target irradiated with 72 GeV 40Ar also cannot be reproduced by several model codes, including MCNPX 2.7a. This may be due to secondary fragments produced in high energy (Ekinetic > 10 GeV) heavy-ion interactions which destroy target nuclei more effectively than primary ions. These observed experimental facts constitute “unresolved problems” from a fundamental point of view. It may have an impact on radiation protection issues for future heavy-ion accelerators. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 18 Nov 2011 14:22 |
| Letzte Änderung: | 05 Mär 2013 09:55 |
| PPN: | |
| Sponsoren: | Considerable part of the work was made in the framework of an International Collaboration (GAMMA-2, Energy plus Transmutation) experimenting at the Nuclotron accelerator in JINR (Dubna, Russia). |
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