### Abstract

First observation of new effects was carried out using the set-up created for searching for a neutron electric dipole moment (EDM) by a crystal-diffraction method. For the first time the neutron dynamical Laue diffraction for the Bragg angles close to a right angle (up to 87°) was studied, using the direct diffraction beam and a thick (∼ 3.5-cm) crystal. The effect of an essential time delay of diffracting neutrons inside the crystal for Bragg angles close to 90° was experimentally observed, using a time-of-flight method. The phenomenon of neutron-beam depolarization was first experimentally observed for the case of Laue diffraction in a noncentrosymmetric α-quartz crystal. It is experimentally proved that the interplanar electric field, affecting a neutron in a crystal, maintains its value up to Bragg angles equal to 87°. These results confirm the opportunity to increase by more than an order of magnitude the sensitivity of the method to the neutron EDM, using the diffraction angles close to 90°, and give a real prospect to exceed the sensitivity of the magnetic resonance method, using ultra-cold neutrons.

Original language | English |
---|---|

Journal | Applied Physics A: Materials Science and Processing |

Volume | 74 |

Issue number | SUPPL.I |

DOIs | |

Publication status | Published - 1 Dec 2002 |

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### Scopus subject areas

- Materials Science(all)
- Physics and Astronomy (miscellaneous)

### Cite this

*Applied Physics A: Materials Science and Processing*,

*74*(SUPPL.I). https://doi.org/10.1007/s003390201754

}

*Applied Physics A: Materials Science and Processing*, vol. 74, no. SUPPL.I. https://doi.org/10.1007/s003390201754

**First observation of new effects at the set-up for searching for a neutron electric dipole moment by a crystal-diffraction method.** / Fedorov, V. V.; Lapin, E. G.; Semenikhin, S. Y.; Voronin, V. V.

Research output

TY - JOUR

T1 - First observation of new effects at the set-up for searching for a neutron electric dipole moment by a crystal-diffraction method

AU - Fedorov, V. V.

AU - Lapin, E. G.

AU - Semenikhin, S. Y.

AU - Voronin, V. V.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - First observation of new effects was carried out using the set-up created for searching for a neutron electric dipole moment (EDM) by a crystal-diffraction method. For the first time the neutron dynamical Laue diffraction for the Bragg angles close to a right angle (up to 87°) was studied, using the direct diffraction beam and a thick (∼ 3.5-cm) crystal. The effect of an essential time delay of diffracting neutrons inside the crystal for Bragg angles close to 90° was experimentally observed, using a time-of-flight method. The phenomenon of neutron-beam depolarization was first experimentally observed for the case of Laue diffraction in a noncentrosymmetric α-quartz crystal. It is experimentally proved that the interplanar electric field, affecting a neutron in a crystal, maintains its value up to Bragg angles equal to 87°. These results confirm the opportunity to increase by more than an order of magnitude the sensitivity of the method to the neutron EDM, using the diffraction angles close to 90°, and give a real prospect to exceed the sensitivity of the magnetic resonance method, using ultra-cold neutrons.

AB - First observation of new effects was carried out using the set-up created for searching for a neutron electric dipole moment (EDM) by a crystal-diffraction method. For the first time the neutron dynamical Laue diffraction for the Bragg angles close to a right angle (up to 87°) was studied, using the direct diffraction beam and a thick (∼ 3.5-cm) crystal. The effect of an essential time delay of diffracting neutrons inside the crystal for Bragg angles close to 90° was experimentally observed, using a time-of-flight method. The phenomenon of neutron-beam depolarization was first experimentally observed for the case of Laue diffraction in a noncentrosymmetric α-quartz crystal. It is experimentally proved that the interplanar electric field, affecting a neutron in a crystal, maintains its value up to Bragg angles equal to 87°. These results confirm the opportunity to increase by more than an order of magnitude the sensitivity of the method to the neutron EDM, using the diffraction angles close to 90°, and give a real prospect to exceed the sensitivity of the magnetic resonance method, using ultra-cold neutrons.

UR - http://www.scopus.com/inward/record.url?scp=0037003667&partnerID=8YFLogxK

U2 - 10.1007/s003390201754

DO - 10.1007/s003390201754

M3 - Article

AN - SCOPUS:0037003667

VL - 74

JO - Applied Physics A: Materials Science and Processing

JF - Applied Physics A: Materials Science and Processing

SN - 0947-8396

IS - SUPPL.I

ER -