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Ebsdorfergrund, Germany

Hashemi-Nezhad S.R.,University of Sydney | Zamani-Valasiadou M.,Aristotle University of Thessaloniki | Krivopustov M.I.,Joint Institute for Nuclear Research | Brandt R.,University of Marburg | And 4 more authors.
Physics Research International | Year: 2011

The neutron production in thick targets irradiated with 1GeV 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 44GeV 12C onto thick Cu-, Pb-, and U-targets beyond calculated rates. The experimental spallation product yield curve in a 20cm thick Cu target irradiated with 72GeV 40Ar also cannot be reproduced by several model codes, including MCNPX 2.7a. This may be due to secondary fragments produced in high energy (E kinetic > 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. Copyright © 2011 S. R. Hashemi-Nezhad et al. Source


Westmeier W.,Dr. Westmeier GmbH | Siemon K.,Dr. Westmeier GmbH
Journal of Environmental Radioactivity | Year: 2013

An overview on the status and function of current spectrometry hardware, of detectors having energy-dispersive (spectrometric) properties as well as of the latest developments in quantitative spectrometry software is presented. Making extensive use of modern computing power, new strategies in high-precision spectrum analysis have been developed which enhance the quality of results and also open new fields of spectrometric applications. Three principles have been newly introduced to spectrum analysis software:. -use no approximations in modelling (Physics, no numerology)-apply all available models to find a solution (Fuzzy Logic)-repeat complete analyses for iterative improvement (Learn from results). © 2012 Elsevier Ltd. Source


Westmeier W.,Dr. Westmeier GmbH | Siemon K.,Dr. Westmeier GmbH
IEEE Transactions on Nuclear Science | Year: 2012

An overview of the latest developments in quantitative spectrometry software is presented. New strategies and algorithms introduced are characterized by buzzwords Physics, no numerology, Fuzzy logic and Repeated analyses. With the implementation of these new ideas one arrives at software capabilities that were unreachable before and which are now realized in the GAMMA-W, SODIGAM and ALPS packages. © 2012 IEEE. Source

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