Mostrando 141 - 160 Resultados de 9,203 Para Buscar '"neutrón"', tiempo de consulta: 0.17s Limitar resultados
  1. 141
    “…Monte Carlo simulations are being performed to design and characterize the neutron optics components for the two fundamental neutron physics beamlines at the Spallation Neutron Source. …”
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  2. 142
    por Bowman, J. David, Penttila, S. I.
    Publicado 2005
    “…We present a conceptual design for an experiment to measure the neutron lifetime (~886 s) with an accuracy of 10(−4). …”
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  3. 143
    “…The features of two fundamental neutron physics research stations at the NIST cold neutron research facility are described in some detail. …”
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  4. 144
    por Beverly, W. B., Spiegel, V.
    Publicado 1964
    “…The penetration of D–D neutrons in water has been studied through measurements of first collision dose. …”
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  5. 145
    “…In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold neutrons (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. …”
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  6. 146
    “…Two analytical methods based on the neutrons high penetrability, i.e. neutron diffraction (ND) and neutron computed tomography (NCT) were used to investigate the structure of the aragonitic skeleton of an exemplar/sample of Dipastraea pallida (Dana 1846), a modern hermatypic coral. …”
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  7. 147
  8. 148
    “…The ERINDA funded scientific visit has enabled the groups at U ppsala Uni- versity and University of Jyväskylä to work closer together on the design of a neutron converter that will be used as neutron source in fissi on yield studies at the IGISOL-JYFLTRAP facility at the University of Jyväsk ylä. …”
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  12. 152
    “…Highly enriched  6Li and  7Li Cs2LiYCl 6 (CLYC) scintillators were investigated in view of their application as thermal neutron counter (CLYC-6) and as fast neutron spectrometer (CLYC-7) in the recently developed B-RAD radiation survey metre, an instrument designed to work in regions of high magnetic fields, currently equipped with a probe for photon dose rate measurements and γ-spectrometry. …”
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  13. 153
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  15. 155
    “…A method of the determination of cumulative yields of delayed neutron precursors is developed. This method is based on the iterative least-square procedure applied to delayed neutron decay curves measured after irradiation of sup 2 sup 3 sup 5 U sample by thermal neutrons. …”
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  16. 156
    “…The library contains neutron data for 103 nuclei - i.e. for 38 actinide nuclei (from sup 2 sup 3 sup 2 Th to sup 2 sup 4 sup 9 Cm), 26 fission fragment nuclei and 39 nuclei in structural and technological materials. …”
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  17. 157
    “…The time resolution of NR, which ranges from seconds to minutes depending on the reflection intensity, unfortunately remains low, particularly for small samples made of state-of-the-art materials even with the latest neutron reflectometers. To overcome this problem, a large-area focusing supermirror manufactured with ultra-precision machining has been employed to enhance the neutron flux at the sample, and a gain of approximately 100% in the neutron flux was achieved. …”
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  18. 158
    por Bandyopadhyay, Debades
    Publicado 2021
    “…This volume focuses on topical issues in nuclear astrophysics, particularly supernovae, neutron stars, and binary neutron star mergers. An overview of those topics is presented in this editorial. …”
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  19. 159
    “…Most H and D atoms were identified at essentially the same positions in both the neutron-only and the X-ray/neutron joint refinements. …”
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