Threshold Reaction Rates and Energy Spectra of Neutrons in the 0.8-1.6 GeV Proton-Irradiated W, Na Targets

Titarenko, Yury E.; Batyaev, V. F.; Karpikhin, E. I.; Zhivun, V. M.; Kvasova, Svetlana V.; Mulambetov, R. D.; Koldobsky, Alexander; Trebukhovsky, Yury V.; Korolev, V. A.; Smirnov, G. N.; Voloshenko, Andrey M.; Belov, Vladimir Yu.; Kachalin, Nikolay I.; Mashnik, S. G.; Prael, R.E.; Sierk, Arnold J.; Yasuda, Hideshi

doi:10.1080/00223131.2002.10875322

Cited by 1 publication

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References 3 publications

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“…The evaluation of the modeling of the secondary-proton spectra is unreliable because of the lack of complete experimental information. As noted in [4,8], the agreement between the computational and experimental results is good for the neutron spectra calculated with the LAHET program. Consequently, the computed reaction rates calculated with the normalized excitation functions and the computed neutron and proton spectra on the surface of and inside the target were used to determine the corresponding computed spectrum-averaged cross section for the reactions (n, xn), (n, α), (n, p), and (p, xn):…”

Section: Irradiation Of a Lead Target And Determination Of The Numbermentioning

confidence: 49%

“…A method for obtaining the excitation functions in the required energy range is described in [4,5,16]. The matching of the excitation functions from the MENDL-2 and -2p databases and the functions calculated using the LAHET program is done in the 100 MeV range by renormalizing one of the data sets.…”

Section: Irradiation Of a Lead Target And Determination Of The Numbermentioning

confidence: 99%

“…3) the production cross section of product nuclei in thin lead targets, both enriched with [206][207][208] Pb and with the naturally occurring composition, as well as 209 Bi for proton energy 0.04, 0.07, 0.1, 0.15, 0.25, 0.4, 0.6, 0.8, 1.2, 1.6, and 2.6 GeV [6,7]; and 4) the double-differential cross sections for neutron generation under irradiation of Pb, W, Zr, Cu, Al, and Na thin targets by 0.8, 1, and 1.6 GeV protons, using a time-of-flight spectrometer [4,8].…”

mentioning

confidence: 99%

“…2) the threshold rates of the reactions occurring in the experimental samples, which are placed on the outer surface and inside a thick tungsten-sodium target irradiated by 0.8 GeV protons [4,5];…”

mentioning

confidence: 99%

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Experimental determination and computational modeling of threshold reaction rates in 0.8 GeV proton-irradiated lead target

et al. 2009

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The results of an experimental determination and computational modeling of the rates of threshold reactions on 209 the external surface of and inside a thick lead target irradiated by 0.8 GeV protons are presented. The reaction rates were measured by γ spectrometry using Ge and (Ge-Li) detectors with resolution 1.8 and 2.9 keV, respectively, on the 1332 keV γ-line. Measurements of 2467 independent and cumulative threshold reaction rates were performed with 244 samples. The LAHET program was used for computational modeling of the results. The MENDL and MENDL2p libraries, the EXFOR databases, and the LAHET program were used to construct the excitation functions of the nuclides formed. The experimentally measured reaction rates are compared with the computed rates. The neutron and proton fluxes along the target, both on its external surface and in the interior volume, were calculated using the experimental threshold reaction rates and the computed cross sections of the reactions averaged over the spectrum of the neutrons and protons. The reaction rates measured inside and on the surface of a natural-lead target were used to determine the accuracy with which the target's activity is measured.Two types of facilities are now being designed and built on the basis of high-current accelerators. The first type consists of neutron sources which can be used successfully in fundamental and applied physics, materials science, and biology; the second type consists of electronuclear facilities for transmutation of radioactive wastes and, possibly, the production of electricity. Even though there are structural differences, which are due to the purpose of a facility, the two types have a unit in common -a target which is bombarded by a proton beam from a high-current linear accelerator. Ordinarily, a Pb + Bi eutectic, Pb, Hg (liquid targets), or W, Ta (solid targets) are used as target materials.The presence of a target unit, which is used to generate neutrons of a hadron-nuclear cascade, in nuclear facilities raises the problem of determining its basic neutron-physical parameters. Individual parameters directly affect the nuclear-physical characteristics of the blanket (the total yield and spectrum of neutrons from the target); other parameters affect the nuclear-physical characteristics of the target itself (energy release, radiation resistance, production of residual prod-

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Section: Irradiation Of a Lead Target And Determination Of The Numbermentioning

confidence: 49%

Section: Irradiation Of a Lead Target And Determination Of The Numbermentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Experimental determination and computational modeling of threshold reaction rates in 0.8 GeV proton-irradiated lead target

et al. 2009

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Threshold Reaction Rates and Energy Spectra of Neutrons in the 0.8-1.6 GeV Proton-Irradiated W, Na Targets

Cited by 1 publication

References 3 publications

Experimental determination and computational modeling of threshold reaction rates in 0.8 GeV proton-irradiated lead target

Experimental determination and computational modeling of threshold reaction rates in 0.8 GeV proton-irradiated lead target

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