Neutron yields from 1GeV/nucleon 238U ion beams on Fe target

Yordanov, O.; Gunzert-Marx, K.; Adrich, P.; Aumann, T.; Boretzky, K.; Emling, H.; Fehrenbacher, G.; Gutermuth, F.; Iwase, Hiroshi; Johansson, H.; Jones, K. L.; Kovalov, A.; Radon, T.; Schardt, D.

doi:10.1016/j.nimb.2005.06.199

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…The results reported in [1,2] show evidence that secondary fragments excite target nuclei stronger than primary ions, thus producing more neutrons than expected from calculation. Findings from [1][2][3] are not in contradiction as will be shown [4]. It seems that as if unresolved problems arise only after an energetic limit that is barely approached in the 1 GeV/u 238 U + Fe experiment.…”

Section: Ionmentioning

confidence: 68%

“…Experimental results published for thick targets irradiated with relativistic ions are scarce and sometimes contradictory. In the experiment on "neutron yields from 1 GeV/ nucleon 238 U ion beams on Fe target" by Yordanov et al [3], the neutron spectra above 50 MeV were studied. The authors could fit their experimental data with well-known models and stated (quote) that "after a first beam-target collision the projectile residue may subsequently undergo the same type 2 Physics Research International Table 1: The direct measurement of neutron production in THICK Pb-targets irradiated at the Synchrophasotron [11].…”

Section: Introductionmentioning

confidence: 99%

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Neutron Production in Thick Targets Irradiated with High-Energy Ions

Hashemi-Nezhad

Zamani-Valasiadou

Krivopustov

et al. 2011

Physics Research International

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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 ( 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.

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Section: Ionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Neutron Production in Thick Targets Irradiated with High-Energy Ions

Hashemi-Nezhad

Zamani-Valasiadou

Krivopustov

et al. 2011

Physics Research International

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“…This leads to long ranges in matter even for heavy ions and to large muliplicities for production of fast neutrons. FLUKA could reproduce reasonably well the double-differential neutron distributions obtained in experiments [13].…”

Section: Shielding Against Prompt Radiationmentioning

confidence: 53%

Layout of the Super-FRS target hall

Kozlova

Weick²,

Achenbach³

et al. 2008

Nuclear Instruments and Methods in Physics Research Section B:

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“…Details can be found in [4]. In addition the large area neutron detector LAND [5] was used to measure the neutron yields at forward angles from the uranium beam [6]. LAND is built from 200 modules, each of 0.1×2 m…”

Section: Experiments and Simulationsmentioning

confidence: 99%

Double Differential Neutron Yields From Thick Targets Induced by Relativistic Carbon and Uranium Beams

Gunzert-Marx¹,

Radon²,

Fehrenbacher³

et al. 2007

Proceedings of International Workshop on Fast Neutron Detectors and Applications — PoS(FNDA2006)

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In order to design appropriate shielding for the next generation high-intensity acceleratorfacilities like e.g. FAIR, knowledge of neutron emissions induced by relativistic heavy ion beams stopping in accelerator components or concrete shielding is indispensable. Measured neutron spectra can directly be used as source terms for Monte-Carlo transport calculations. Thus measurements were carried out in Cave B of the SIS accelerator at GSI in order to determine double differential yields of fast neutrons produced by heavy ion beams in thick stopping targets. Three different beam-target combinations were investigated: (a) 12C beam (400 MeV/u) stopping in a 20 cm thick graphite target, (b) 12C beam (1 GeV/u) stopping in a 20 cm thick iron target, and (c) 238U beam (1 GeV/u) stopping in a 20 cm thick iron target. Fast neutrons emerging from the targets were detected by a BaF2 scintillator positioned at various angles with respect to the primary beam axis. The neutron energy was obtained from time-offlight measurements. A comparison of the measured double differential yields with the Monte-Carlo code FLUKA and measurements with the so called Large Area Neutron Detector (LAND) at GSI are presented.

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Neutron yields from 1GeV/nucleon 238U ion beams on Fe target

Cited by 14 publications

References 19 publications

Neutron Production in Thick Targets Irradiated with High-Energy Ions

Neutron Production in Thick Targets Irradiated with High-Energy Ions

Layout of the Super-FRS target hall

Double Differential Neutron Yields From Thick Targets Induced by Relativistic Carbon and Uranium Beams

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