Scintillating glass for the detection of slow neutrons

Voitovetskii, V.K.; Tolmacheva, N. S.; Arsaev, M.I.

doi:10.1007/bf01481455

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…The first neutron beam monitor was placed at the downstream end of the T-zero chopper pit. The monitors were the scintillating glass type 47,48 , widely used at ISIS 49,5051 . There then followed another short section of collimation, and then a pit containing the Fermi chopper, at the downstream end of which was another monitor of the same design as the first.…”

Section: Pre-upgrade Instrument Descriptionmentioning

confidence: 99%

Upgrade to the MAPS neutron time-of-flight chopper spectrometer

Ewings

Stewart

Perring

et al. 2019

Review of Scientific Instruments

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The MAPS direct geometry time-of-flight chopper spectrometer at the ISIS pulsed neutron and muon source has been in operation since 1999 and its novel use of a large array of position-sensitive neutron detectors paved the way for a later generations of chopper spectrometers around the world. Almost two decades of experience of user operations on MAPS, together with lessons learned from the operation of new generation instruments, led to a decision to perform three parallel upgrades to the instrument. These were to replace the primary beamline collimation with supermirror neutron guides, to install a disk chopper, and to modify the geometry of the poisoning in the water moderator viewed by MAPS. Together these upgrades were expected to increase the neutron flux substantially, to allow more flexible use of repetition rate multiplication and to reduce some sources of background.Here we report the details of these upgrades, and compare the performance of the instrument before and after their installation, as well as to Monte Carlo simulations. These illustrate that the instrument is performing in line with, and in some respects in excess of, expectations. It is anticipated that the improvement in performance will have a significant impact on the capabilities of the instrument. A few examples of scientific commissioning are presented to illustrate some of the possibilities.

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Section: Pre-upgrade Instrument Descriptionmentioning

confidence: 99%

Upgrade to the MAPS neutron time-of-flight chopper spectrometer

Ewings

Stewart

Perring

et al. 2019

Review of Scientific Instruments

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“…5,6 Compared to plastic scintillators they offer the advantage of the significantly higher densities that are desired for gamma radiation detection. 5 However, so far no commercial glass scintillator is available for gamma-ray spectroscopy to detect different radionuclides with welldefined full-energy peaks and reasonable energy resolutions. 5 However, so far no commercial glass scintillator is available for gamma-ray spectroscopy to detect different radionuclides with welldefined full-energy peaks and reasonable energy resolutions.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] Compared to single-crystal detectors, glass has been an attractive scintillating material in view of its economical and high-volume production possibility and easy processing for complex geometries, including glass fibers with light guiding capabilities. 5,6 Compared to plastic scintillators they offer the advantage of the significantly higher densities that are desired for gamma radiation detection. In addition, glass matrix materials are robust with high thermal, mechanical, and chemical stability, ideal for use in systems that must operate in adverse environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, glass matrix materials are robust with high thermal, mechanical, and chemical stability, ideal for use in systems that must operate in adverse environmental conditions. 5 However, so far no commercial glass scintillator is available for gamma-ray spectroscopy to detect different radionuclides with welldefined full-energy peaks and reasonable energy resolutions. The energy resolution of a scintillator is defined by the energy full width at half maximum per energy at the maximum count rate peak.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of a gadolinium‐rich oxyhalide glass scintillator for gamma ray spectroscopy

et al. 2017

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A transparent gadolinium‐rich oxyhalide glass scintillator was developed for gamma ray spectroscopy with an energy resolution of 14.0% at 662 keV. To the best of our knowledge, this is the highest energy resolution reported for a glass‐based scintillator. The high gadolinium content facilitated a scintillator density of 4.4 g/cm3. The high fluorine and bromine incorporation is advantageous for better uniformity and a good light output of ~3200 Ph/MeV. The peak emission at 431 nm with a FWHM of 90 nm, resulting from the fast Ce3+ transitions, yielded pulse‐height spectra with distinctive peaks from 122 keV to 1.33 keV for gamma radiation from different nuclides.

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Optimization of lithium-glass fibers with lithium depleted coating for neutron detection

Mayer

Bliss

2019

Nuclear Instruments and Methods in Physics Research Section A:

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Scintillating glass for the detection of slow neutrons

Cited by 5 publications

References 3 publications

Upgrade to the MAPS neutron time-of-flight chopper spectrometer

Upgrade to the MAPS neutron time-of-flight chopper spectrometer

Optimization of a gadolinium‐rich oxyhalide glass scintillator for gamma ray spectroscopy

Optimization of lithium-glass fibers with lithium depleted coating for neutron detection

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