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Université de Fribourg

A measurement of the neutron to 199Hg magnetic moment ratio

Afach, S. ; Baker, C. A. ; Ban, G. ; Bison, Georg ; Bodek, K. ; Burghoff, M. ; Chowdhuri, Z. ; Daum, M. ; Fertl, M. ; Franke, B. ; Geltenbort, P. ; Green, K. ; Grinten, M. G. D. van der ; Grujic, Zoran ; Harris, P. G. ; Heil, W. ; Hélaine, V. ; Henneck, R. ; Horras, M. ; Iaydjiev, P. ; Ivanov, S. N. ; Kasprzak, Malgorzata ; Kermaïdic, Y. ; Kirch, K. ; Knecht, A. ; Koch, Hans-Christian ; Krempel, J. ; Kuźniak, M. ; Lauss, B. ; Lefort, T. ; Lemière, Y. ; Mtchedlishvili, A. ; Naviliat-Cuncic, O. ; Pendlebury, J. M. ; Perkowski, M. ; Pierre, E. ; Piegsa, F. M. ; Pignol, G. ; Prashanth, P. N. ; Quéméner, G. ; Rebreyend, D. ; Ries, D. ; Roccia, S. ; Schmidt-Wellenburg, P. ; Schnabel, A. ; Severijns, N. ; Shiers, D. ; Smith, K.F. ; Voigt, J. ; Weis, Antoine

In: Physics Letters B, 2014, vol. 739, p. 128–132

The neutron gyromagnetic ratio has been measured relative to that of the 199Hg atom with an uncertainty of 0.8 ppm. We employed an apparatus where ultracold neutrons and mercury atoms are stored in the same volume and report the result γn/γHg=3.8424574(30)γn/γHg=3.8424574(30).

Université de Fribourg

Towards a new measurement of the neutron electric dipole moment

Altarev, I. ; Ban, G. ; Bison, Georg ; Bodek, K. ; Burghoff, M. ; Cvijovic, Milan ; Daum, M. ; Fierlinger, P. ; Gutsmiedl, E. ; Hampel, G. ; Heil, W. ; Henneck, R. ; Horras, M. ; Khomutov, N. ; Kirch, K. ; Kistryn, S. ; Knappe-Grüneberg, S. ; Knecht, A. ; Knowles, Paul E. ; Kozela, A. ; Kratz, J. V. ; Kuchler, F. ; Kuźniak, M. ; Lauer, T. ; Lauss, B. ; Lefort, T. ; Mtchedlishvili, A. ; Naviliat-Cuncic, O. ; Paul, S. ; Pazgalev, Anatoly S. ; Petzoldt, G. ; Pierre, E. ; Plonka-Spehr, C. ; Quéméner, G. ; Rebreyend, D. ; Roccia, S. ; Rogel, G. ; Sander-Thoemmes, T. ; Schnabel, A. ; Severijns, N. ; Sobolev, Yu. ; Stoepler, R. ; Trahms, L. ; Weis, Antoine ; Wiehl, N. ; Zejma, J. ; Zsigmond, G.

In: Nuclear Instruments and Methods in Physics Research Section A, 2009, p. -

The effort towards a new measurement of the neutron electric dipole moment (nEDM) at the Paul Scherrer Institut's (PSI) new high intensity source of ultracold neutrons (UCN) is described. The experimental technique relies on Ramsey's method of separated oscillatory fields, using UCN in vacuum with the apparatus at ambient temperature. In the first phase, R&D towards the upgrade of the...

Université de Fribourg

Additional results from the first dedicated search for neutron–mirror–neutron oscillations

Bodek, K. ; Kistryn, S. ; Kuźniak, M. ; Zejma, J. ; Burghoff, M. ; Knappe-Grüneberg, S. ; Sander-Thoemmes, T. ; Schnabel, A. ; Trahms, L. ; Ban, G. ; Lefort, T. ; Naviliat-Cuncic, O. ; Khomutov, N. ; Knowles, Paul E. ; Pazgalev, Anatoly S. ; Weis, Antoine ; Rogel, G. ; Quéméner, G. ; Rebreyend, D. ; Roccia, S. ; Bison, Georg ; Severijns, N. ; Eberhardt, K. ; Hampel, G. ; Heil, W. ; Kratz, J.V. ; Lauer, T. ; Plonka-Spehr, C. ; Sobolev, Yu. ; Wiehl, N. ; Altarev, I. ; Fierlinger, P. ; Gutsmiedl, E. ; Paul, S. ; Stoepler, R. ; Daum, M. ; Henneck, R. ; Kirch, K. ; Knecht, A. ; Lauss, B. ; Mtchedlishvili, A. ; Petzoldt, G. ; Zsigmond, G.

In: Nuclear Instruments and Methods in Physics Research Section A, 2009///doi: 10.1016/j.nima.2009.07.047

The existence of a mirror world holding a copy of our ordinary particle spectrum could lead to oscillations between the neutron (n) and its mirror partner (n′). Such oscillations could manifest themselves in storage experiments with ultracold neutrons whose storage lifetime would depend on the applied magnetic field. Here, extended details and measurements from the first dedicated experimental...