Development of resonant detectors for epithermal neutron spectroscopy at pulsed neutron sources

Tardocchi, M.; Pietropaolo, A.; Senesi, R.; Gorini, G.

doi:10.1016/j.nima.2003.10.076

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…After scattering at an angle φ, neutrons with final energy E 1 travel a distance L 1 to the detector as schematically shown in Fig. 9 [114][115][116][117]. Energy selection on the instrument is performed using a resonance filter after scattering by the sample, typically Au or U foils (see discussion below).…”

Section: The Vesuvio Spectrometermentioning

confidence: 99%

Electron-volt neutron spectroscopy: beyond fundamental systems

Andreani

Krzystyniak

Romanelli

et al. 2017

Advances in Physics

141

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This work provides an up-to-date account of the use of electron-volt neutron spectroscopy in materials research. This is a growing area of neutron science, capitalising upon the unique insights provided by epithermal neutrons on the behaviour and properties of an increasing number of complex materials. As such, the present work builds upon the aims and scope of a previous contribution to this journal back in 2005, whose primary focus was on a detailed description of the theoretical foundations of the technique and their application to fundamental systems [see Andreani et al., Adv. Phys. 54 (2005) p.377] A lot has happened since then, and this review intends to capture such progress in the field. With both expert and novice in mind, we start by presenting the general principles underpinning the technique and discuss recent conceptual and methodological developments. We emphasise the increasing use of the technique as a non-invasive spectroscopic probe with intrinsic mass selectivity, as well as the concurrent use of neutron diffraction and first-principles computational materials modelling to guide and interpret experiments. To illustrate the state of the art, we discuss in detail a number of recent exemplars, chosen to highlight the use of electron-volt neutron spectroscopy across physics, chemistry, biology, and materials science. These include: hydrides and proton conductors for energy applications; protons, deuterons, and oxygen atoms in bulk water; aqueous protons confined in nanoporous silicas, carbon nanotubes, and graphene-related materials; hydrated water in proteins and DNA; and the uptake of molecular hydrogen by soft nanostructured media, promising materials for energy-storage applications. For the primary benefit of the novice, this last case study is presented in a pedagogical and question-driven fashion, in the hope that it will stimulate further work into uncharted territory by newcomers to the field. All along, we emphasise the increasing (and much-needed) synergy between experiments using electron-volt neutrons and contemporary condensed matter theory and materials modelling to compute and ultimately understand neutron-scattering observables, as well as their relation to materials properties not amenable to scrutiny using other experimental probes

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Section: The Vesuvio Spectrometermentioning

confidence: 99%

Electron-volt neutron spectroscopy: beyond fundamental systems

Andreani

Krzystyniak

Romanelli

et al. 2017

Advances in Physics

141

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“…As far as epithermal neutron scattering is concerned, since 1986 an extensive research and development activity was carried out at ISIS originally on the eVS and subsequently on the VESUVIO spectrometers [9,10,31,[49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66]. Part of this research activity was addressed to develop and enhance the capabilities and effectiveness of the so-called resonance detector spectrometer (RDS) configuration, conceived and tested in the early 1980s [67][68][69][70][71][72][73].…”

Section: Epithermal Neutrons: the Resonance Detector Techniquementioning

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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