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2. A method to measure the resonance transitions between the gravitationally bound quantum states of neutrons in the GRANIT spectrometer

Author

Kreuz, M., Nesvizhevsky, V.V., Schmidt-Wellenburg, P., Soldner, T., Thomas, M., Börner, H.G., Naraghi, F., Pignol, G., Protasov, K.V., Rebreyend, D., Vezzu, F., Flaminio, R., Michel, C., Morgado, N., Pinard, L., Baeßler, S., Gagarski, A.M., Grigorieva, L.A., Kuzmina, T.M., Meyerovich, A.E., Mezhov-Deglin, L.P., Petrov, G.A., Strelkov, A.V., and Voronin, A.Yu.

Published
2009
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4. Investigation of the neutron quantum states in the Earth's gravitational field

Author

Nesvizhevsky, V.V., Petukhov, A.K., Borner, H.G., Baranova, T.A., Gagarski, A.M., Petrov, G.A., Protasov, K.V., Voronin, A.Yu., Baessler, S., Abele, H., Westphal, A., and Lucovac, L.

Subjects
Gravity -- Analysis -- Research, Neutrons -- Atomic properties -- Research -- Analysis
Abstract

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 […]

Published
2005

5. Palaeozoic tectonic evolution of the Middle Urals in the light of the ESRU seismic experiments

Author

Friberg, M., Juhlin, C., Beckholmen, M., Petrov, G.A., and Green, A.G.

Subjects
Geological research -- Analysis, Seismic reflection method -- Analysis, Geology, Stratigraphic -- Paleozoic, Sedimentary basins -- Analysis, Earth sciences
Abstract

A new compilation of deep seismic reflection data, in combination with the results of recent geological and isotopic investigations, provides the basis for significantly refined structural and evolutionary models of the Middle Urals. Many of the major structural boundaries observed at the surface (e.g. Main Uralian Thrust, Main Uralian Normal Fault, Serov-Mauk Fault, Prianitchnikova Shear Zone) can be followed on the seismic reflection data to depths of 8-15 km. Only a few features can be traced through the horizontal to shallow dipping zones of middle-crustal reflectivity that extend beneath much of the Middle Urals. Exceptions might be the Deevo Thrust and a newly discovered deep band of moderately dipping reflections beneath the West Siberian Basin that may represent the remnants of an ancient subduction zone. The reflectivity of the lower crust and Moho are similar beneath the hinterland of the Urals and below the western part of the West Siberian Basin, suggesting that in both places they have the same extensional origin. Accretion of various exotic terranes to the eastern margin of Baltica during Late Palaeozoic time involved considerable shortening of the continental margin. The accreted terranes (e.g. Tagil, Petrokamensk and Alapaevsk Arc Complexes) consist mostly of island-arc material formed during Mid- and Late Palaeozoic time. Closely associated with the island arcs are several high-grade metamorphic complexes (e.g. Salda and Murzinka--Adui Complexes) that were exhumed during and after Late Palaeozoic convergence. Towards the end of the orogeny, several north-south-trending strike-slip faults (e.g. Sisert Fault) were active. After the orogeny, major periods of tectonism and magmatism in the Middle Urals resulted in the extrusion of the Siberian trap basalts, crustal stretching and/or underplating, and the formation of the West Siberian Basin, the planet's largest intracontinental sedimentary basin. Finally, a period of renewed thrust faulting, often reactivating older faults, led to the inversion of the Mesozoic basins. Keywords: Uralide Orogen, West Siberian Basin, Palaeozoic, Mesozoic, seismic profiling.

Published
2002

6. Recent experimental studies on particle-accompanied fission

Author

Mutterer, M., Kopatch, Yu.N., Jesinger, P., Gagarski, A.M., Gönnenwein, F., von Kalben, J., Khlebnikov, S.G., Kojouharov, I., Lubkiewics, E., Mezentseva, Z., Nesvishevsky, V., Petrov, G.A., Schaffner, H., Scharma, H., Schwalm, D., Thirolf, P., Trzaska, W.H., Tyurin, G.P., and Wollersheim, H.-J.

Published
2004
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8. Investigation of the prompt neutron emission mechanism in low energy fission of 235,233U(nth, f) and 252Cf(sf)

Author

Val’ski G.V., Gagarski A.M., Shcherbakov O.A., Vorobyev A.S., and Petrov G.A.

Subjects
Physics, QC1-999
Abstract

A series of experiments has been performed to measure prompt neutron angular and energy distributions from thermal neutron-induced fission of 235,233U in correlation with the fission fragments. These distributions have been analyzed with the assumption of neutron isotropic emission from accelerated fission fragments. The performed analysis demonstrates that all obtained results can be described within 5% accuracy using this assumption. This discrepancy is approximately constant and doesn’t depend on fragment mass and the total kinetic energy (TKE). Some minor peculiarities of angular distribution may be interpreted as a result of anisotropy of the fission neutron angular distribution in the fragment center-of-mass system.

Published
2010
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10. GRANIT project: a trap for gravitational quantum states of UCN

Author

Nesvizhevsky, V.V., Petukhov, A.K., Börner, H.G., Soldner, T., Schmidt-Wellenburg, P., Kreuz, M., Pignol, G., Protasov, K.V., Rebreyend, D., Vezzu, F., Forest, D., Ganau, P., Mackowski, J.M., Michel, Christine, Montorio, J.L., Morgado, N., Pinard, L., Remillieux, A., Gagarski, A.M., Petrov, G.A., Kusmina, A.M., Strelkov, A.V., Abele, H., Baeßler, S., Voronin, A.Yu., Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), GRANIT, and bibliotheque, LPSC

Subjects
Quantum Physics, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], FOS: Physical sciences, Quantum Physics (quant-ph), [PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph]
Abstract

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 energy states wave functions. Improvements in position-like measurements can increase the accuracy by an order of magnitude only. We therefore develop another approach, consisting in accurate measurements of the energy levels. The GRANIT experiment is devoted to the study of resonant transitions between quantum states induced by an oscillating perturbation. According to Heisenberg's uncertainty relations, the accuracy of measurement of the energy levels is limited by the time available to perform the transitions. Thus, trapping quantum states will be necessary, and each source of losses has to be controlled in order to maximize the lifetime of the states. We discuss the general principles of transitions between quantum states, and consider the main systematical losses of neutrons in a trap., Comment: presented in ISINN 15 seminar, Dubna

Published
2007
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11. Study of the neutron quantum states in the Earth's gravitational field

Author

Nesvizhevsky, V.V., Borner, H.G., Baranova, T.A., Petrov, G.A., Protasov, K.V., Voronin, A.Yu., Abele, H., Westphal, A., Lucovac, L., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), GRANIT, and bibliotheque, LPSC

Subjects
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], neutron flux, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], neutrons, wave functions, potential well, position sensitive particle detectors, neutron quantum states, earth gravitational field
Abstract

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 lowest quantum states correspond to their expectations with an accuracy of ~25%. A spatial density distribution in a standing neutron wave above a mirror was measured for a set of a few lowest quantum states. A position-sensitive neutron detector with an extra high spatial resolution of 1-2 mu m was developed and tested for this particular task. Although this experiment was not designed or optimized to search for an additional short-range force, nevertheless it allowed us to slightly improve the published boundary in the nanometer range of characteristic distances. We studied systematical uncertainties in the chosen "flow-through" method as well as the feasibility to improve further the accuracy in this experiment

Published
2005

14. RECENT EXPERIMENTS ON PARTICLE-ACCOMPANIED FISSION

Author

MUTTERER, M., primary, KOPATCH, Yu.N., additional, JESINGER, P., additional, GAGARSKI, A.M., additional, SPERANSKY, M., additional, TISHCHENKO, V., additional, GÖNNENWEIN, F., additional, KALBEN, J. v., additional, KHLEBNIKOV, S.G., additional, KOJOUHAROV, I., additional, LUBKIEWICS, E., additional, MEZENZEVA, Z., additional, NESVISHEVSKY, V., additional, PETROV, G.A., additional, SCHAFFNER, H., additional, SCHARMA, H., additional, SCHWALM, D., additional, THIROLF, P., additional, TRZASKA, W.H., additional, TYURIN, G.P., additional, and WOLLERSHEIM, H.-J., additional

Published
2005
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15. In memory of Oleg Igorevich Sumbaev

Author

Alferov, Zh.I., primary, Varshalovich, D.A., additional, Vorob'ev, A.A., additional, Konoplev, K.A., additional, Lobashev, Vladimir M., additional, Mazets, Evgenii P., additional, Nazarenko, V.A., additional, Petrov, G.A., additional, Petrov, Yu.V., additional, Serebrov, Anatolii P., additional, Skrinskii, A.N., additional, and Fedorov, V.V., additional

Published
2003
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16. CORRELATIONS IN TERNARY FISSION

Author

JESINGER, P., primary, GÖNNENWEIN, F., additional, KÖTZLE, A., additional, MUTTERER, M., additional, KALBEN, J. V., additional, TRZASKA, W., additional, PETROV, G.A., additional, GAGARSKI, A.M., additional, DANILYAN, G., additional, PAVLOV, V.S., additional, ZIMMER, O., additional, and NESVIZHEVSKY, V., additional

Published
2000
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19. Observation of a triple correlation in ternary fission: is time reversal invariance violated?

Author

Jesinger, P, primary, Kötzle, A, additional, Gagarski, A.M, additional, Gönnenwein, F, additional, Danilyan, G, additional, Pavlov, V.S, additional, Chvatchkin, V.B, additional, Mutterer, M, additional, Neumaier, S.R, additional, Petrov, G.A, additional, Petrova, V.I, additional, Nesvizhevsky, V, additional, Zimmer, O, additional, Geltenbort, P, additional, Schmidt, K, additional, and Korobkina, K, additional

Published
2000
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25. Space parity violation in nuclear fission

Author

Petrov, G.A., primary, Valskii, G.V., additional, Petukhov, A.K., additional, Alexandrovich, A.Ya., additional, Pleva, Yu.S., additional, Sokolov, V.E., additional, Laptev, A.B., additional, and Scherbakov, O.A., additional

Published
1989
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30. In memory of Oleg Igorevich Sumbaev

Author

Alferov, Zh.I., Varshalovich, D.A., Vorob'ev, A.A., Konoplev, K.A., Lobashev, Vladimir M., Mazets, Evgenii P., Nazarenko, V.A., Petrov, G.A., Petrov, Yu.V., Serebrov, A.P., Skrinskii, A.N., and Fedorov, V.V.

Abstract

No Abstract

Published
2003

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