Evaluation of the n + 3H Cross Section at En=14 MeV

Navrátil, Petr; Quaglioni, Sofia; Anderson, Jordan; Dietrich, Frank; McNabb, D. P.; Hale, G. M.

doi:10.2172/972411

Cited by 1 publication

(5 citation statements)

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“…Hale's data are already available in the current ENDL library. Note that the new 14-MeV data with the CF's generated in this report are within the errors quoted in the report of Navratil et al [1]. However, the difference between the R-matrix and corrected NCSM/RGM results at back angles is reduced by approximately 5%…”

Section: Discussionsupporting

confidence: 78%

“…We begin by generating a CF at 14 MeV in a way similar to what was done in Navratil et al [1], but with some minor variations. Previously we used CF's for p+ 3 He at the same bombarding energy as in the n+T calculation.…”

Section: Correction Factorsmentioning

confidence: 99%

“…Thus a different approach is needed. In Navratil et al [1] there is a comparison of Hale's R-matrix approach at 6 MeV with the calculations of Viviani et al [7] at the same energy. MeV data [6] divided by the NCSM/RGM p+ 3 He calculation.…”

Section: Correction Factorsmentioning

confidence: 99%

“…Very recently, Navratil et al [1] used such principles to determine cross sections for n+T at 14-MeV incident energy from measured values for p+ 3 He at a nearby energy (13.6 MeV). In that work, the physics content was provided by using a no-core shell model (NCSM) for the structure of the mass-3…”

Section: Introductionmentioning

confidence: 99%

“…

AbstractIn a recent report Navratil et al [1] evaluated the angle-integrated cross section and the angular distribution for 14-MeV n+T elastic scattering by inferring these cross sections from accurately measured p+ 3 He angular distributions. This evaluation used a combination of two theoretical treatments, based on the no-core shell model and resonating-group method (NCSM/RGM) [2] and on the R-matrix formalism [3], to connect the two charge-symmetric reactions n+T and p+ 3 He.

…”

mentioning

confidence: 99%

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The prediction of Neutron Elastic Scattering from Tritium for E(n) = 6-14 MeV

Anderson¹,

Dietrich²,

Luu³

et al. 2010

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In a recent report Navratil et al. [1] evaluated the angle-integrated cross section and the angular distribution for 14-MeV n+T elastic scattering by inferring these cross sections from accurately measured p+ 3 He angular distributions. This evaluation used a combination of two theoretical treatments, based on the no-core shell model and resonating-group method (NCSM/RGM) [2] and on the R-matrix formalism [3], to connect the two charge-symmetric reactions n+T and p+ 3 He. In this report we extend this treatment to cover the neutron incident energy range 6-14 MeV. To do this, we evaluate angle-dependent correction factors for the NCSM/RGM calculations so that they agree with the p+ 3 He data near 6 MeV, and using the results found earlier near 14 MeV we interpolate these correction factors to obtain correction factors throughout the 6-14 MeV energy range. The agreement between the corrected NCSM/RGM and R-Matrix values for the integral elastic cross sections is excellent (±1%), and these are in very good agreement with total cross section experiments. This result can be attributed to the nearly constant correction factors at forward angles, and to the evidently satisfactory physics content of the two calculations. The difference in angular shape, obtained by comparing values of the scattering probability distribution P() vs. (the cosine of the c.m. scattering angle), is about ±4% and appears to be related to differences in the two theoretical calculations.Averaging the calculations yields P() values with errors of ±2½% or less. These averaged values, along with the corresponding quantities for the differential cross sections, will form the basis of a new evaluation of n+T elastic scattering. Computer files of the results discussed in this report will be supplied upon request.2

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Section: Discussionsupporting

confidence: 78%

Section: Correction Factorsmentioning

confidence: 99%