Quasi-specular albedo of cold neutrons from powder of nanoparticles (2009)
Cubitt, R., Lychagin, E. V., Muzychka, A. Yu., Nekhaev, G. V., Nesvizhevsky, V. V., Pignol, G., ...
We predicted and observed for the first time the quasi-specular albedo of cold neutrons at small incidence angles from a powder of nanoparticles. This albedo (reflection) is due to multiple neutron...
Baeßler, S., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., Voronin, A. Yu.
In this paper, we discuss a possibility to improve constraints on spin-dependent short-range interactions in the range of 1 - 200 micrometer significantly. For such interactions, our constraints are...
Kreuz, M., Nesvizhevsky, V. V., Schmidt-Wellenburg, P., Soldner, T., Thomas, M., Boerner, H. G., ...
We present a method to measure the resonance transitions between the gravitationally bound quantum states of neutrons in the GRANIT spectrometer. The purpose of GRANIT is to improve the accuracy of...
Storage of very cold neutrons in a trap with nano-structured walls (2008)
Lychagin, E. V., Muzychka, A. Yu., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., Strelkov, A. V.
We report on storage of Very Cold Neutrons (VCN) in a trap with walls containing powder of diamond nanoparticles. The efficient VCN reflection is provided by multiple diffusive elastic scattering of...
Ultracold-neutron infrastructure for the gravitational spectrometer GRANIT (2008)
Schmidt-Wellenburg, P., Andersen, K. H., Courtois, P., Kreuz, M., Mironov, S., Nesvizhevsky, V. V., ...
The gravitational spectrometer GRANIT will be set up at the Institut Laue Langevin. It will profit from the high ultracold neutron density produced by a dedicated source. A monochromator made of...
Centrifugal quantum states of neutrons (2008)
Nesvizhevsky, V. V., Petukhov, A. K., Protasov, K. V., Voronin, A. Yu.
We propose a method for observation of the quasi-stationary states of neutrons, localized near the curved mirror surface. The bounding effective well is formed by the centrifugal potential and the...
The reflection of very cold neutrons from diamond powder nanoparticles (2008)
Nesvizhevsky, V. V., Lychagin, E. V., Muzychka, A. Yu., Strelkov, A. V., Pignol, G., Protasov, K. V.
We study possibility of efficient reflection of very cold neutrons (VCN) from powders of nanoparticles. In particular, we measured the scattering of VCN at a powder of diamond nanoparticles as a...
Neutron scattering and extra short range interactions (2007)
Nesvizhevsky, V. V., Pignol, G., Protasov, K. V.
The available data on neutron scattering were analyzed to constrain a hypothetical new short-range interaction. We show that these constraints are several orders of magnitude better than those...
Quantum motion of a neutron in a waveguide in the gravitational field (2007)
Voronin, Alexei Yu., Abele, H., Baessler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
We study theoretically the quantum motion of a neutron in a horizontal wave-guide in the gravitational field of the Earth. The wave-guide in question is equipped with a mirror below and a rough...
Vesna, V. A., Gledenov, Yu. M., Nesvizhevsky, V. V., Petoukhov, A. K., Sedyshev, P. V., Soldner, T., ...
We describe measurements of the parity-violating (P-odd) triton emission asymmetry coefficient in the 6Li(n,alfa)3H reaction with polarised cold neutrons. Experiments were carried out at the...
GRANIT project: a trap for gravitational quantum states of UCN (2007)
Pignol, G., Protasov, K. V., Rebreyend, D., Vezzu, F., Nesvizhevsky, V. V., Petukhov, A. K., ...
Previous studies of gravitationally bound states of ultracold neutrons showed the quantization of energy levels, and confirmed quantum mechanical predictions for the average size of the two lowest...
A source of ultra-cold neutrons for the gravitational spectrometer GRANIT (2007)
Schmidt-Wellenburg, P., Geltenbort, P., Nesvizhevsky, V. V., Plonka, C., Soldner, T., Vezzu, F., ...
We present the status of the development of a dedicated high density ultra-cold neutron (UCN) source dedicated to the gravitational spectrometer GRANIT. The source employs superthermal conversion of...
Westphal, A., Abele, H., Baessler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
Quantum states in the Earth's gravitational field were observed, when ultra-cold neutrons fall under gravity. The experimental results can be described by the quantum mechanical scattering model as...
Experimental constraints for additional short-range forces from neutron experiments (2007)
Nesvizhevsky, V.V., Pignol, G., Protasov, K.V.
We present preliminary results on sensitivity of experiments with slow neutrons to constrain additional forces in a wide distance range: from picometers to micrometers. In the sub-nanometer range,...
Experimental constraints for additional short-range forces from neutron experiments (2007)
Nesvizhevsky, V. V., Pignol, G., Protasov, K. V.
We present preliminary results on sensitivity of experiments with slow neutrons to constrain additional forces in a wide distance range: from picometers to micrometers. In the sub-nanometer range,...
Baessler, S., Nesvizhevsky, V.V., Protasov, K.V., Voronin, A.Yu.
We present a new constraint for the axion monopole-dipole coupling in the range of 1 micrometer to a few millimeters, previously unavailable for experimental study. The constraint was obtained using...
Efficient extraction of a collimated ultra-cold neutron beam using diffusive channels (2007)
Schmidt-Wellenburg, P., Barnard, J., Geltenbort, P., Nesvizhevsky, V. V., Plonka, C., Soldner, T., ...
We present a first experimental demonstration of a new method to extract a well-collimated beam of ultra-cold neutrons (UCN) from a storage vessel. Neutrons with too large divergence are not removed...
Spontaneous emission of graviton by a quantum bouncer (2007)
Pignol, G., Ptotasov, K. V., Nesvizhevsky, V. V.
Spontaneous emission of graviton rates for the quantum bouncer states are evaluated.
A note on spontaneous emission of gravitons by a quantum bouncer (2007)
Pignol, G., Protasov, K.V., Nesvizhevsky, V.V.
Spontaneous emission of graviton rates for the quantum bouncer states are evaluated.
A note on spontaneous emission of gravitons by a quantum bouncer (2007)
Pignol, G., Protasov, K.V., Nesvizhevsky, V.V.
Spontaneous emission of graviton rates for the quantum bouncer states are evaluated.
A note on spontaneous emission of gravitons by a quantum bouncer (2007)
Pignol, G., Protasov, K.V., Nesvizhevsky, V.V.
Spontaneous emission of graviton rates for the quantum bouncer states are evaluated.
Lambrecht, A., Nesvizhevsky, V. V., Onofrio, R., Reynaud, S.
We discuss a proposal to measure the Casimir force in the parallel plate configuration in the $1-10\mu$m range via a high-sensitivity torsional balance. This will allow to measure the thermal...
Thermal and dissipative effects in Casimir physics (2006)
Brown-Hayes, M, Brownell, J. H., Dalvit, D. A. R., Kim, W. J., Lambrecht, A., Lombardo, F. C., ...
We report on current efforts to detect the thermal and dissipative contributions to the Casimir force. For the thermal component, two experiments are in progress at Dartmouth and at the Institute...
Lambrecht, A., Nesvizhevsky, V. V., Onofrio, R., Reynaud, S.
We discuss a proposal to measure the Casimir force in the parallel plate configuration in the $1-10\mu$m range via a high-sensitivity torsional balance. This will allow to measure the thermal...
Baessler, S., Nesvizhevsky, V. V., Protasov, K. V., Voronin, A. Yu.
We present a new constraint for the axion monopole-dipole coupling in the range of 1 micrometer to a few millimeters, previously unavailable for experimental study. The constraint was obtained using...
Gravitational quantum states of neutrons in a rough waveguide (2006)
Meyerovich, A. E., Nesvizhevsky, V. V.
A theory of gravitational quantum states of ultracold neutrons in waveguides with absorbing/scattering walls is presented. The theory covers recent experiments in which the ultracold neutrons were...
Quantum motion of a neutron in a waveguide in the gravitational field (2006)
Voronin, A.Yu., Abele, H., Baeßler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
We study theoretically the quantum motion of a neutron in a horizontal waveguide in the gravitational field of the Earth. The waveguide in question is equipped with a mirror below and a rough surface...
Nanoparticles as a possible moderator for an ultracold neutron source (2006)
Nesvizhevsky, V.V., Pignol, G., Protasov, K.V.
Ultracold and very cold neutrons (UCN and VCN) interact strongly with nanoparticles due to the similarity of their wavelengths and nanoparticles sizes. We analyze the hypothesis that this interaction...
Westphal, Alexander, Abele, H., Baessler, S., Nesvizhevsky, V. V., Petukhov, A. K., Protasov, K. V., ...
Quantum states in the Earth's gravitational field were observed, when ultra-cold neutrons fall under gravity. The experimental results can be described by the quantum mechanical scattering model as...
Study of the neutron quantum states in the gravity field (2006)
Nesvizhevsky, V.V., Petukhov, A.K., .Boerner, H.G, Baranova, T.A., Gagarski, A.M., Petrov, G.A., ...
We have studied neutron quantum states in the potential well formed by the earth's gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in the...
Nesvizhevsky, V.V., Protasov, K.V.
An upper limit to non-Newtonian attracive forces is obtained from the measurement of quantum states of neutrons in the Earth's gravitational field. It is established in a completely new way and...
Measurement of quantum states of neutrons in the Earth's gravitational field (2006)
Nesvizhevsky, V.V., Boerner, H.G., Gagarski, A.M., Petoukhov, A.K., Petrov, G.A., Abele, H., ...
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified in the measurement of neutron transmission between a horizontal mirror on the bottom and an absorber...
Measurement of quantum states of neutrons in the Earth's gravitational field (2006)
Nesvizhevsky, V.V., Boerner, H.G., Gagarski, A.M., Petoukhov, A.K., Petrov, G.A., Abele, H., ...
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified in the measurement of neutron transmission between a horizontal mirror on the bottom and an absorber...
Measurement of quantum states of neutrons in the Earth's gravitational field (2006)
Nesvizhevsky, V.V., Boerner, H.G., Gagarski, A.M., Petoukhov, A.K., Petrov, G.A., Abele, H., ...
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified in the measurement of neutron transmission between a horizontal mirror on the bottom and an absorber...
Quantum motion of a neutron in a waveguide in the gravitational field (2006)
Voronin, A.Yu., Abele, H., Baeßler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
We study theoretically the quantum motion of a neutron in a horizontal waveguide in the gravitational field of the Earth. The waveguide in question is equipped with a mirror below and a rough surface...
Westphal, A., Abele, H., Baessler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
Quantum states in the Earth's gravitational field were observed, when ultra-cold neutrons fall under gravity. The experimental results can be described by the quantum mechanical scattering model as...
Quantum motion of a neutron in a waveguide in the gravitational field (2006)
Voronin, A.Yu., Abele, H., Baeßler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
We study theoretically the quantum motion of a neutron in a horizontal waveguide in the gravitational field of the Earth. The waveguide in question is equipped with a mirror below and a rough surface...
Westphal, A., Abele, H., Baessler, S., Nesvizhevsky, V.V., Petukhov, A.K., Protasov, K.V., ...
Quantum states in the Earth's gravitational field were observed, when ultra-cold neutrons fall under gravity. The experimental results can be described by the quantum mechanical scattering model as...
Quantum motion of a neutron in a wave-guide in the gravitational field (2005)
Voronin, A. Yu., Abele, H., Baessler, S., Nesvizhevsky, V. V., Petukhov, A. K., Protasov, K. V., ...
We study theoretically the quantum motion of a neutron in a horizontal wave-guide in the gravitational field of the Earth. The wave-guide in question is equipped with a mirror below and a rough...
Two hypothesizes concerning interaction of neutrons with nanoparticles and having applications in the physics of ultracold neutron (UCN) were recently considered in ref. [Physics of Atomic Nuclei...
Constraints for quasi-elastic neutron reflections in the range dE~10^(-12)-10^(-9) eV (2005)
A restrictive constraint for any quasi-elastic process was obtained in the previously inaccessible energy range dE~10^(-12)-3x10^(-10) eV for reflections of ultracold neutrons from surfaces in the...
Nanoparticles as a possible moderator for an ultracold neutron source (2005)
Nesvizhevsky, V. V., Pignol, G., Protasov, K. V.
Ultracold and very cold neutrons (UCN and VCN) interact strongly with nanoparticles due to the similarity of their wavelengths and nanoparticles sizes. We analyze the hypothesis that this interaction...
Two hypothesizes concerning interaction of neutrons with nanoparticles and having applications in the physics of ultracold neutron (UCN) were recently considered in ref. [Physics of Atomic Nuclei...
Constraints for quasi-elastic neutron reflections in the range dE~10^(-12)-10^(-9) eV (2005)
A restrictive constraint for any quasi-elastic process was obtained in the previously inaccessible energy range dE~10^(-12)-3x10^(-10) eV for reflections of ultracold neutrons from surfaces in the...
Study of the neutron quantum states in the gravity field (2005)
Nesvizhevsky, V. V., Petukhov, A. K., Boerner, H. G., Baranova, T. A., Gagarski, A. M., Petrov, G. A., ...
We have studied neutron quantum states in the potential well formed by the earth's gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in the...
Nanoparticles as a possible moderator for an ultracold neutron source (2005)
Nesvizhevsky, V.V., Pignol, G., Protasov, K.V.
Ultracold and very cold neutrons (UCN and VCN) interact strongly with nanoparticles due to the similarity of their wavelengths and nanoparticles sizes. We analyze the hypothesis that this interaction...
Two hypothesizes concerning interaction of neutrons with nanoparticles and having applications in the physics of ultracold neutron (UCN) were recently considered in ref. [Physics of Atomic Nuclei...
Constraints for quasi-elastic neutron reflections in the range dE~10^(-12)-10^(-9) eV (2005)
A restrictive constraint for any quasi-elastic process was obtained in the previously inaccessible energy range dE~10^(-12)-3x10^(-10) eV for reflections of ultracold neutrons from surfaces in the...
Investigation of the neutron quantum states in the Earth's gravitational field (2005)
Nesvizhevsky, V.V., Petukhov, A.K., Borner, H.G., Baranova, T.A., Gagarski, A.M., Petrov, G.A., ...
We studied the neutron quantum states in the potential well formed by the Earth's gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in two...
Nesvizhevsky, V.V., Protasov, K.V.
An upper limit to non-Newtonian attractive forces is obtained from the measurement of quantum states of neutrons in the Earth's gravitational field. This limit improves the existing constraints in...
Study of the neutron quantum states in the gravity field (2005)
Nesvizhevsky, V.V., Petukhov, A.K., .Boerner, H.G, Baranova, T.A., Gagarski, A.M., Petrov, G.A., ...
We have studied neutron quantum states in the potential well formed by the earth's gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in the...
Nanoparticles as a possible moderator for an ultracold neutron source (2005)
Nesvizhevsky, V.V., Pignol, G., Protasov, K.V.
Ultracold and very cold neutrons (UCN and VCN) interact strongly with nanoparticles due to the similarity of their wavelengths and nanoparticles sizes. We analyze the hypothesis that this interaction...
Investigation of the neutron quantum states in the Earth's gravitational field (2005)
Nesvizhevsky, V.V., Petukhov, A.K., Borner, H.G., Baranova, T.A., Gagarski, A.M., Petrov, G.A., ...
We studied the neutron quantum states in the potential well formed by the Earth's gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in two...
Nesvizhevsky, V.V., Protasov, K.V.
An upper limit to non-Newtonian attractive forces is obtained from the measurement of quantum states of neutrons in the Earth's gravitational field. This limit improves the existing constraints in...
Study of the neutron quantum states in the gravity field (2005)
Nesvizhevsky, V.V., Petukhov, A.K., .Boerner, H.G, Baranova, T.A., Gagarski, A.M., Petrov, G.A., ...
We have studied neutron quantum states in the potential well formed by the earth's gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in the...
Two hypothesizes concerning interaction of neutrons with nanoparticles and having applications in the physics of ultracold neutron (UCN) were recently considered in ref. [Physics of Atomic Nuclei...
Constraints for quasi-elastic neutron reflections in the range dE~10^(-12)-10^(-9) eV (2005)
A restrictive constraint for any quasi-elastic process was obtained in the previously inaccessible energy range dE~10^(-12)-3x10^(-10) eV for reflections of ultracold neutrons from surfaces in the...
Nesvizhevsky, V. V., Protasov, K. V.
An upper limit to non-Newtonian attracive forces is obtained from the measurement of quantum states of neutrons in the Earth's gravitational field. This limit improves the existing constrains in the...
Nesvizhevsky, V.V., Protasov, K.V.
An upper limit to non-Newtonian attracive forces is obtained from the measurement of quantum states of neutrons in the Earth's gravitational field. It is established in a completely new way and...
Nesvizhevsky, V.V., Protasov, K.V.
An upper limit to non-Newtonian attracive forces is obtained from the measurement of quantum states of neutrons in the Earth's gravitational field. It is established in a completely new way and...
Measurement of quantum states of neutrons in the Earth's gravitational field (2003)
Nesvizhevsky, V. V., Boerner, H. G., Gagarsky, A. M., Petoukhov, A. K., Petrov, G. A., Abele, H., ...
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified in the measurement of neutron transmission between a horizontal mirror on the bottom and an absorber...
Measurement of quantum states of neutrons in the Earth's gravitational field (2003)
Nesvizhevsky, V.V., Boerner, H.G., Gagarski, A.M., Petoukhov, A.K., Petrov, G.A., Abele, H., ...
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified in the measurement of neutron transmission between a horizontal mirror on the bottom and an absorber...
Nesvizhevsky, V.V., Petoukhov, A.K., Boerner, H.G., Protasov, K.V., Voronin, A.Yu., Westphal, A., ...
Measurement of quantum states of neutrons in the Earth's gravitational field (2003)
Nesvizhevsky, V.V., Boerner, H.G., Gagarski, A.M., Petoukhov, A.K., Petrov, G.A., Abele, H., ...
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified in the measurement of neutron transmission between a horizontal mirror on the bottom and an absorber...
Nesvizhevsky, V.V., Petoukhov, A.K., Boerner, H.G., Protasov, K.V., Voronin, A.Yu., Westphal, A., ...
Serot, O, Wagemans, C, Wagemans, J, Goeminne, G, Köster, U, Geltenbort, P, ...
The energy distributions and yields of light charged particles emitted during thermal neutron induced fission of 245Cm have been measured at the high flux reactor of the Institute Laue Langevin in...