Neutron optics of strongly absorbing media and interaction of long-wave neutrons with gadolinium films

Frank, A. I.; Боднарчук, В. И.; Geltenbort, P.; Karpikhin, I.L.; Kulin, G. V.; Kulina, O. V.

doi:10.1134/1.1619495

Cited by 16 publications

(5 citation statements)

References 15 publications

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“…During the past fifteen years a number of experiments with the gravity UCN spectrometer with interference filters have been performed [18][19][20][21][22]. Due to the narrow transmission spectrum the filters may be used as an effective monochromator and analyzer of energy, and the acceleration of neutrons in the gravitational field of the Earth on their way from the monochromator to the analyzer permits performing energy scanning.…”

Section: Introductionmentioning

confidence: 99%

Time-of-flight Fourier UCN spectrometer

Kulin

Frank

Goryunov

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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We describe a new time-of-flight Fourier spectrometer for investigation of UCN diffraction by a moving grating. The device operates in the regime of a discrete set of modulation frequencies. The results of the first experiments show that the spectrometer may be used for obtaining UCN energy spectra in the energy range of 60÷200 neV with a resolution of about 5 neV. The accuracy of determination of the line position was estimated to be several units of 10 −10 eV

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Section: Introductionmentioning

confidence: 99%

Time-of-flight Fourier UCN spectrometer

Kulin

Frank

Goryunov

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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“…Frank et al performed a number of neutron optics experiments specific for the UCN energy range: UCN diffraction on moving gratings [184], test of 1/v law of the neutron absorption cross section in strongly absorbing medium [185] (see also experiments [186] and comment [187]), effect of accelerating matter on the UCN energy change [188], test of the dispersion law for the neutron waves [189].…”

Section: Other Experiments With Ucnmentioning

confidence: 99%

Experiments with ultracold neutrons - first 50 years

Pokotilovski¹

2018

Preprint

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“…To describe the high absorption of Gd, the non-zero imaginary part of the neutron coherent scattering length should be taken into account. We used value b Gd = 6.0-11i fm [13] and bulk density N Gd = 30 nm -3 which gives us the scattering length density of Gd  = (1.8 -3.3i)10 -4 nm -2 .…”

Section: Samples Designmentioning

confidence: 99%

Peculiarities of neutron waveguides with thin Gd layer

Khaydukov

Кравцов

Progliado

et al. 2016

J. Phys.: Conf. Ser.

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Peculiarities of the formation of a neutron enhanced standing wave in the structure with a thin highly absorbing layer of gadolinium are considered in the article. An analogue of the poisoning effect well known in reactor physics was found. The effect is stronger for the Nb/Gd/Nb system. Despite of this effect, for a Nb/Gd bilayer and a Nb/Gd/Nb trilayer placed between Al 2 O 3 substrate and Cu layer, it is shown theoretically and experimentally that one order of magnitude enhancement of neutron density is possible in the vicinity of the Gd layer. This enhancement makes it possible to study domain formation in the Gd layer under transition of the Nb layer(s) into the superconducting state (cryptoferromagnetic phase).

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Neutron optics of strongly absorbing media and interaction of long-wave neutrons with gadolinium films

Cited by 16 publications

References 15 publications

Time-of-flight Fourier UCN spectrometer

Time-of-flight Fourier UCN spectrometer

Experiments with ultracold neutrons - first 50 years

Peculiarities of neutron waveguides with thin Gd layer

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