New possibilities for neutron EDM search using diffraction by crystal without a centre of symmetry

Федоров, В. В.; Воронин, В. В.; Lapin, E. G.; Sumbaev, O. I.

doi:10.1016/s0921-4526(96)00859-9

Cited by 17 publications

(15 citation statements)

References 7 publications

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“…The values of these interplanar fields depend on a momentum direction and energy of neutron in crystal reaching maxima in vicinities of the exact Bragg directions or energies. Such fields give rise for new polarization phenomena [23,[25][26][27][28][29][30][31][32][33] in the neutron Laue diffraction [23,[25][26][27][28][29][30] and in the neutron optics [30][31][32][33] and provide new methods of a search for the neutron electric dipole moment (EDM) [25,27,31,32]. Measurement, for instance, of a spin precession angle for neutron, moving close to the Bragg condition through a thick crystal in such a strong electric field gives hope to improve the limits on the neutron EDM, achieved with the magnetic resonance method using ultracold neutrons (UCN method).…”

Section: Neutron Diffraction In a Crystal Without A Centre Of Symmetrymentioning

confidence: 99%

Study of neutron fundamental properties in the perfect crystal optics and diffraction

Федоров

Воронин

2019

EPJ Web Conf.

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Review of the new crystal-diffraction methods to study fundamental neutron properties and interactions is presented. Features of neutron optics in the crystal without a center of symmetry is discussed as well as the first experimental results and perspectives to improve the sensitivity of experiments on a search for the neutron electric dipole moment (EDM) and CP-violating short-range pseudomagnetic nucleon-nucleon interaction. Also, the possibility to develop ultra-precise neutron spectroscopy using Laue diffraction in the perfect crystal is discussed, which can be used for a broad range of experiments: search for the neutron electric charge; test of the equivalence principle; precise measurements of neutron scattering amplitudes; crystal quality testing.

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Section: Neutron Diffraction In a Crystal Without A Centre Of Symmetrymentioning

confidence: 99%

Study of neutron fundamental properties in the perfect crystal optics and diffraction

Федоров

Воронин

2019

EPJ Web Conf.

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“…The values of these interplanar fields depend on a momentum direction and energy of neutron in crystal reaching maxima in vicinities of the exact Bragg directions or energies. Such fields give rise for new polarization phenomena [13,[15][16][17][18][19][20][21][22][23] in the neutron diffraction [13,[15][16][17][18][19][20] and in the neutron optics [20][21][22][23] and provide new methods of a search for the neutron electric dipole moment (EDM) [15,17,21,22]. Measurement, for instance, of a spin precession angle for neutron, moving close to the Bragg condition through a thick crystal in such a strong electric field gives hope to improve the limits on the neutron EDM, achieved with the magnetic resonance method using ultra cold neutrons (UCN method).…”

Section: Neutron Diffraction In a Crystal Without Centre Of Symmetrymentioning

confidence: 99%

Modern Status of Searches for nEDM, Using Neutron Optics and Diffraction in Noncentrosymmetric Crystals

Федоров

Воронин

2018

Proceedings of the International Conference on Neutron Optics (NOP2017)

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New neutron-optics effects in crystals, which can be used to study the fundamental properties of neutron are discussed. Predicted and discovered not long ago strong electric fields of strength up to 10 8 or 10 9 V/cm, which in noncentrosymmetric crystals may act on the neutron, provide new possibilities for measuring the neutron electric dipole moment (nEDM) by the crystal-diffraction method and also become possible to perform a search for pseudomagnetic forces acting on neutrons and violating CP invariance. For the interaction range of such forces λ A < 10 −5 cm, the best constraints on the product of the scalar and pseudoscalar coupling constants have already been obtained for the interaction induced by the exchange of a light pseudoscalar (axion-like) particle. The present-day status and prospects of neutron-optics crystal-diffraction experiments aimed at searches for the nEDM and pseudomagnetic forces are considered.

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“…High intensity UCN sources are being constructed and planned all over the world. On the other hand, neutron diffraction by a non-centrosymmetric crystal, which has the strong electric field of 10 8~1 0 9 V/cm, can be used for nEDM experiments [5][6][7][8][9]. The sensitivity of nEDM measurement by this approach can be equivalent to the UCN method.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Pendellösung Fringes of a Single Silicon Crystal Using the Pulsed Neutron Source for Neutron EDM Search

Itoh

Nakaji

Uchida

et al. 2018

Proceedings of the International Conference on Neutron Optics (NOP2017)

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The results of the measurement of Pendellösung interference fringes of a single silicon crystal are reported. The Pendellösung fringes are utilized to measure the internal electric field of a non-centrosymmetric crystal for neutron EDM measurement based on crystal diffraction. The experiment was performed using the pulsed neutron source of MLF BL17 at J-PARC. The obtained scattering length of a silicon from the Pendellösung fringes was 4.1±0.6 fm, which was consistent with the standard value of NIST. Statistical uncertainty was considerably large due to the low contrast and poor statistics of the Pendellösung fringes. The possible improvement of the measurement methodology is also discussed.

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New possibilities for neutron EDM search using diffraction by crystal without a centre of symmetry

Cited by 17 publications

References 7 publications

Study of neutron fundamental properties in the perfect crystal optics and diffraction

Study of neutron fundamental properties in the perfect crystal optics and diffraction

Modern Status of Searches for nEDM, Using Neutron Optics and Diffraction in Noncentrosymmetric Crystals

Measurement of Pendellösung Fringes of a Single Silicon Crystal Using the Pulsed Neutron Source for Neutron EDM Search

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