Delayed neutron study using ENDF/B-VI basic nuclear data

Wilson, W.B.; England, T.R.

doi:10.1016/s0149-1970(02)00006-9

Cited by 31 publications

(23 citation statements)

References 5 publications

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“…Similar quality fits using the same 4 terms in the exponential sum, i.e., with four half-lives fixed to those of 9 Li, 17 N, 87 Br and 88 Br, were obtained for all target thicknesses and both nat Pb and 209 Bi targets [7] (not shown here). …”

Section: Resultssupporting

confidence: 63%

“…Note that in addition to the uncertainties in detector efficiency, proton beam intensity monitoring and statistical errors, we took into account systematic errors due to the fitting procedure and background contribution. We add that the extraction of 9 Li yields was impossible due to its short half life, which is comparable with the experimental channel width ∆t ch = 200 ms.…”

Section: Discussionsupporting

confidence: 67%

“…Half-lives for these 4 terms correspond to the previously identified spallation products, namely 9 Li and 17 N, in addition to two fission products 87 Br and 88 Br (with T 1/2 = 55.6 s and T 1/2 = 16.29 s, respectively).…”

Section: Resultsmentioning

confidence: 65%

“…Contrary to the conventional 6-group approach to reproduce the DN decay curves from neutron induced fission on actinides [9], only 4 terms of the above expression were sufficient in our case. Half-lives for these 4 terms correspond to the previously identified spallation products, namely 9 Li and 17 N, in addition to two fission products 87 Br and 88 Br (with T 1/2 = 55.6 s and T 1/2 = 16.29 s, respectively).…”

Section: Resultsmentioning

confidence: 94%

“…3). First, the DN contribution from light mass products as 9 Li and 17 N is clearly more important than the contribution from fission products. In addition, this "unusual" DN emission dominates the DN decay curve for Pb and Bi targets up to the cooling time of 10-20 s (see figure 3).…”

Section: Discussionmentioning

confidence: 99%

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Measurements of delayed neutrons yields and time spectra from 1 GeV protons interacting with thick ^natPb, ²⁰⁹Bi and ^natFe targets

Ridikas

Barzakh

Blidéanu

et al. 2007

Nd2007

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Abstract. This paper presents the experimental results on the DN yields and time spectra from 1 GeV protons interacting with the nat Pb, 209 Bi and nat Fe targets of variable thicknesses from 5 cm to 55 cm. Both absolute yields and time constants were obtained. In parallel, the MCNPX and PHITS codes were used to predict the DN precursors and construct the theoretical DN tables. Different model parameters are examined and show significant dependence on the choice of the intra-nuclear cascade and fission-evaporation models used. These data and modelling are of great importance for the new generation spallation neutron sources based on liquid metal technologies. Finally, the above experiment allowed the determination of the production cross sections of a number of DN precursors as, 87 Br, 88 Br and 17 N. These results permit the examination of two different reaction mechanisms, namely fission and fragmentation, implemented in high energy transport codes.

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Section: Resultssupporting

confidence: 63%

Section: Discussionsupporting

confidence: 67%

Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

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