Interactions of neutrons with gallium and its isotopes

Koester, L.; Knopf, K.; Waschkowski, W.; Klüver, A.

doi:10.1007/bf01418094

Cited by 27 publications

(16 citation statements)

References 20 publications

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“…This leads to a correction of -(7-1-7).10-4 fm. The experiments resulted in b(Ga)= 7.288 ___0.002 fm, which agrees with b = 7.284 +0.015 fm of the Christiansen filter work [18]. Comparable is also b = 7.21 ___ 0.05 fm obtained by a Bragg diffraction experiment [19].…”

Section: Galliumsupporting

confidence: 73%

Neutron scattering lengths of molten metals determined by gravity refractometry

Reiner

Waschkowski

Koester

1990

Z. Physik A - Atomic Nuclei

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Very accurate values of the coherent neutron scattering lengths of the heavy elements Bi and Pb are important quantities for the investigation of the electric interactions of neutrons with atoms. We performed, therefore, a series of experiments to determine accurate scattering lengths by means of neutron gravity refractometry on liquid mirrors of molten metals. For heavy diamagnetic atoms (e.g. Pb, Bi) the electric contributions to the coherent scattering length b amount to about 1% of b. This contribution decreases with increasing neutron energy depending on the loss of geometrical coherence of the atomic scattering (atomic and nuclear field formfactors). Using this effect, the neutronelectron scattering length and the electric dipole polarizability of the neutron have been determined in a previous work [2], in which high precision values of the coherent scattering lengths of Pb and Bi have been compared with the scattering lengths at energies in the region from 1 eV to 2 keV derived from very precise neutron transmission measurements.In the present work we report on the determination of the coherent scattering lengths for Pb, Bi, and Sn, T1, Ga with uncertainties of about 0.03% using the gravity refractometry [3] with neutron reflection on the molten metals.

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Section: Galliumsupporting

confidence: 73%

Neutron scattering lengths of molten metals determined by gravity refractometry

Reiner

Waschkowski

Koester

1990

Z. Physik A - Atomic Nuclei

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“…Measured thermal capture cross sections are listed in Table 2. The JENDL-4.0 evaluation is completely based on the data of Koester et al [10], which deviate from the other measurements for both nuclides. The capture cross sections of Koester et al were obtained from their measured total and scattering cross sections, while the other measurements were derived by using the activation method.…”

Section: Resonance Parametersmentioning

confidence: 99%

Evaluation of neutron nuclear data for gallium

Shibata

2013

Journal of Nuclear Science and Technology

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Neutron nuclear data on 69,71 Ga have been evaluated for the next version of the Japanese Evaluated Nuclear Data Library (JENDL) general purpose file in the energy region from 10 −5 eV to 20 MeV. The resolved resonance parameters at negative energies were adjusted so as to reproduce measured thermal capture cross sections. The statistical model was applied to calculate the cross sections above the resolved resonance region. In the calculations, coupled-channel optical model parameters were used for neutrons. Preequilibrium and direct-reaction processes were taken into account in addition to the compound process. The present evaluation is consistent with available experimental data. The evaluated data are compiled into an ENDF-formatted data file.

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“…Apart from the astrophysical point of view, it is a promising candidate in reactor technology for liquid metallic coolant [70]. Nowadays reliable cross sections are also of great demand to study the interaction of gallium with neutrons [71]. The thermal neutron capture cross sections are taken from Refs.…”

Section: B the Neutron Capture Cross Sectionsmentioning

confidence: 99%

Microscopic folding model analysis of the radiative(n,γ)reactions near theZ=28shell closure and the weaksprocess

2016

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Microscopic folding model analysis of the radiative (n, γ) reactions near the Z = 28shell-closure and the weak s-process Saumi Dutta, * G. Gangopadhyay, † and Abhijit Bhattacharyya ‡The radiative thermal neutron capture cross sections over the range of thermal energies from 1 keV to 1 MeV are studied in statistical Hauser-Feshbach formalism. The optical model potential is constructed by folding the density dependent M3Y nucleon-nucleon interaction with radial matter densities of target nuclei obtained from relativistic-mean-field (RMF) theory. The standard nuclear reaction code TALYS1.8 is used for calculation of cross sections. The nuclei studied in the present work reside near the Z = 28 proton shell closure and are of astrophysical interests taking part in p-, s-, and r-process of nucleosynthesis. The Maxwellian-averaged cross-section (MACS) values for energies important for astrophysical applications are presented.

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Interactions of neutrons with gallium and its isotopes

Cited by 27 publications

References 20 publications

Neutron scattering lengths of molten metals determined by gravity refractometry

Neutron scattering lengths of molten metals determined by gravity refractometry

Evaluation of neutron nuclear data for gallium

Microscopic folding model analysis of the radiative(n,γ)reactions near theZ=28shell closure and the weaksprocess

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