Inelastic magnetic neutron scattering from inner filled shells of impurity atoms in metals

Agafonov, A. I.

doi:10.1140/epjb/e2010-00182-6

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Especially attractive is the extension of the kinematical region of low (1-10 A ˚1 − ) wavevector transfers, coupled to high energy transfers (typically 0.1-10 eV) defined as high-energy inelastic neutron scattering (HINS) regime [61,93]. The scattering processes in the HINS region are still largely unexplored but would allow exper imental invest igations such as dispersion relations of high energy excitations in magnetic materials, semiconductors, high lying molecular rotational vibrational states, molecular electronic excitations, and electronic levels in solids [17,[94][95][96]. In order to develop HINS at spallation neutron sources, a prototype of a low angle eV RDS-based spectrometer was conceived and realized for the VESUVIO spectrometer.…”

Section: High-energy Inelastic Neutron Scattering On Ice-ihmentioning

confidence: 99%

Radiative neutron capture as a counting technique at pulsed spallation neutron sources: a review of current progress

et al. 2016

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Neutron scattering techniques are attracting an increasing interest from scientists in various research fields, ranging from physics and chemistry to biology and archaeometry. The success of these neutron scattering applications is stimulated by the development of higher performance instrumentation. The development of new techniques and concepts, including radiative capture based neutron detection, is therefore a key issue to be addressed.Radiative capture based neutron detectors utilize the emission of prompt gamma rays after neutron absorption in a suitable isotope and the detection of those gammas by a photon counter. They can be used as simple counters in the thermal region and (simultaneously) as energy selector and counters for neutrons in the eV energy region. Several years of extensive development have made eV neutron spectrometers operating in the so-called resonance detector spectrometer (RDS) configuration outperform their conventional counterparts. In fact, the VESUVIO spectrometer, a flagship instrument at ISIS serving a continuous user programme for eV inelastic neutron spectroscopy measurements, is operating in the RDS configuration since 2007.In this review, we discuss the physical mechanism underlying the RDS configuration and the development of associated instrumentation. A few successful neutron scattering experiments that utilize the radiative capture counting techniques will be presented together with the potential of this technique for thermal neutron diffraction measurements. We also outline possible improvements and future perspectives for radiative capture based neutron detectors in neutron scattering application at pulsed neutron sources.

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Section: High-energy Inelastic Neutron Scattering On Ice-ihmentioning

confidence: 99%

Radiative neutron capture as a counting technique at pulsed spallation neutron sources: a review of current progress

et al. 2016

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“…Such experiments include the study of high (anharmonic) vibrational states in hydrides [170], of electronic transitions in rare earth metals and compounds [90], in molecules and insulators [171], semiconductors [172][173][174][175] and magnetic materials [176,177,82,178-180, 89,91]. Moreover, studies of the dynamics of paired electrons of inner filled s 2 shells of impurity atoms in metals, where the scattering is due to single electron excitations from the inner shell of the impurity to the free states of the metal, have been recently considered on the theoretical ground [181]. In order to fulfil the kinematic requirements imposed by the decrease of the magnetic scattering intensity with the square of the magnetic form factor f (q) see Fig.…”

Section: High-energy Inelastic Neutron Scatteringmentioning

confidence: 99%

Electron volt neutron spectrometers

Pietropaolo

Senesi

2011

Physics Reports

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The advent of pulsed neutron sources has made available intense fluxes of epithermal neutrons (500 meV ≤ E≤100 eV). The possibility to open new investigations on condensed matter with eV neutron scattering techniques, is related to the development of methods, concepts and devices that drive, or are inspired by, emerging studies at this energy scale. Electron volt spectrometers have undergone continuous improvements since the construction of the first prototype instruments, but in the last decade major breakthroughs have been accomplished in terms of resolution and counting statistics, leading, for example, to the direct measurement of the proton 3-D Born-Oppenheimer potential in any material, or to quantitatively probe nuclear quantum effects in hydrogen bonded systems. This paper reports on the most effective methods and concepts for energy analysis and detection, as well as devices for the optimization of electron volt spectrometers for different applications. This is set in the context of the progress made up to date in instrument development. Starting from early stages of development of the technique, particular emphasis will be given to the Vesuvio eV spectrometer at the ISIS neutron source, the first spectrometer where extensive scientific, as well as research and development programmes have been carried out. The potential offered by this type of instrumentation, from single particle excitations to momentum distribution studies, is then put in perspective into the emerging fields of eV spectroscopy applied to cultural heritages and neutron irradiation effects in electronics

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Inelastic magnetic neutron scattering from inner filled shells of impurity atoms in metals

Cited by 2 publications

References 14 publications

Radiative neutron capture as a counting technique at pulsed spallation neutron sources: a review of current progress

Radiative neutron capture as a counting technique at pulsed spallation neutron sources: a review of current progress

Electron volt neutron spectrometers

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