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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 37 records · Page 2
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CsY(MoO4)2 by Materials Project

CsY(MoO4)2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Cs1+ is bonded to twelve O2- atoms to form CsO12 cuboctahedra that share edges with six equivalent CsO12 cuboctahedra, edges with six equivalent MoO4 tetrahedra, and faces with two equivalent YO6 octahedra. There are six shorter (3.36 Å) and six longer (3.57 Å) Cs–O bond lengths. Y3+ is bonded to six equivalent O2- atoms to form YO6 octahedra that share corners with six equivalent MoO4 tetrahedra and faces with two equivalent CsO12 cuboctahedra. All Y–O bond lengths are 2.26 Å. Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with three equivalent YO6 octahedra and edges with three equivalent CsO12 cuboctahedra. The corner-sharing octahedral tilt angles are 19°. There is one shorter (1.75 Å) and three longer (1.81 Å) Mo–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+, one Y3+, and one Mo6+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to three equivalent Cs1+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsI by Materials Project

CsI is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Cs1+ is bonded in a body-centered cubic geometry to eight equivalent I1- atoms. All Cs–I bond lengths are 4.04 Å. I1- is bonded in a body-centered cubic geometry to eight equivalent Cs1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsY(SeO3)2 by Materials Project

CsY(SeO3)2 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent O2- atoms to form CsO12 cuboctahedra that share corners with twelve equivalent CsO12 cuboctahedra and edges with six equivalent YO6 octahedra. There are six shorter (3.30 Å) and six longer (3.52 Å) Cs–O bond lengths. Y3+ is bonded to six equivalent O2- atoms to form YO6 octahedra that share edges with six equivalent CsO12 cuboctahedra. All Y–O bond lengths are 2.28 Å. Se4+ is bonded in a trigonal non-coplanar geometry to three equivalent O2- atoms. All Se–O bond lengths are 1.73 Å. O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Cs1+, one Y3+, and one Se4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsY(NbBr3)6 by Materials Project

CsY(NbBr3)6 crystallizes in the trigonal P-31c space group. The structure is three-dimensional. Cs1+ is bonded in a 12-coordinate geometry to twelve Br1- atoms. There are six shorter (4.08 Å) and six longer (4.19 Å) Cs–Br bond lengths. Y3+ is bonded to six equivalent Br1- atoms to form YBr6 octahedra that share corners with six equivalent NbBr5 square pyramids. All Y–Br bond lengths are 2.86 Å. Nb+2.33+ is bonded to five Br1- atoms to form distorted NbBr5 square pyramids that share a cornercorner with one YBr6 octahedra and corners with four equivalent NbBr5 square pyramids. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–Br bond distances ranging from 2.61–3.00 Å. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent Nb+2.33+ atoms. In the second Br1- site, Br1- is bonded in a 2-coordinate geometry to one Cs1+, one Y3+, and one Nb+2.33+ atom. In the third Br1- site, Br1- is bonded in a 2-coordinate geometry to one Cs1+ and two equivalent Nb+2.33+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsY(WO4)2 by Materials Project

CsY(WO4)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Cs1+ is bonded in a 12-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 2.97–3.09 Å. Y3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Y–O bond distances ranging from 2.30–2.36 Å. W6+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are a spread of W–O bond distances ranging from 1.84–2.16 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Cs1+ and two equivalent W6+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one Y3+, and one W6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Cs1+, one Y3+, and two equivalent W6+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one Y3+, and one W6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsY(BH4)4 by Materials Project

CsY(BH4)4 crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Cs1+ is bonded in a 8-coordinate geometry to eight equivalent H+0.50+ atoms. There are four shorter (3.19 Å) and four longer (3.36 Å) Cs–H bond lengths. Y3+ is bonded in a 12-coordinate geometry to twelve H+0.50+ atoms. There are eight shorter (2.35 Å) and four longer (2.36 Å) Y–H bond lengths. B3- is bonded in a tetrahedral geometry to four H+0.50+ atoms. There is one shorter (1.20 Å) and three longer (1.24 Å) B–H bond length. There are four inequivalent H+0.50+ sites. In the first H+0.50+ site, H+0.50+ is bonded in a distorted single-bond geometry to one Y3+ and one B3- atom. In the second H+0.50+ site, H+0.50+ is bonded in a single-bond geometry to one Y3+ and one B3- atom. In the third H+0.50+ site, H+0.50+ is bonded in a single-bond geometry to two equivalent Cs1+ and one B3- atom. In the fourth H+0.50+ site, H+0.50+ is bonded in a single-bond geometry to one Y3+ and one B3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2026

Report on Coastal Structure Integrated Wave Energy Converters (CSI-WECs)

This report investigates a largely underexplored, and underexploited, application for wave energy: coastal structure integrated wave energy converters (CSI-WECs). These WEC types have significant potential to rapidly advance the wave energy industry while addressing the challenges of coastal community resiliency and marine energy integration and application, and the urgent need for increased coastal protection. To further support the value proposition investigation of this work, three wave energy developers agreed to conduct an energy production analysis of their technology for the four sites identified. Additionally, a geographic information system-based tool was developed that supports efficient and comprehensive site assessment for optimal and high-value deployments.

16 TIDAL AND WAVE POWER↗
DOE OSTI2022

Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT

Here, we present results of several measurements of CsI[Na] scintillation response to 3–60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used to estimate the coherent elastic neutrino-nucleus scattering (CEvNS) event rate for the first observation of this process achieved by COHERENT at the Spallation Neutron Source (SNS), have been reassessed. We discuss corrections for the identified systematic effects and update the respective uncertainty values. The impact of updated results on future precision tests of CEvNS is estimated. We scrutinize potential systematic effects that could affect each measurement. In particular we confirm the response of the H11934-200 Hamamatsu photomultiplier tube (PMT) used for the measurements presented in this study to be linear in the relevant signal scale region.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2024

Accessing new physics with an undoped, cryogenic CsI CEvNS detector for COHERENT at the SNS

We consider the potential for a 10 kg undoped cryogenic CsI detector operating at the Spallation Neutron Source to measure coherent elastic neutrino-nucleus scattering and its sensitivity to discover new physics beyond the standard model (BSM). Through a combination of increased event rate, lower threshold, and good timing resolution, such a detector would significantly improve on past measurements. We considered tests of several BSM scenarios such as neutrino nonstandard interactions and accelerator-produced dark matter. This detector’s performance was also studied for relevant questions in nuclear physics and neutrino astronomy, namely the weak charge distribution of Cs and I nuclei and detection of neutrinos from a core-collapse supernova. Published by the American Physical Society 2024

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2022

First operation of undoped CsI directly coupled with SiPMs at 77 K

Abstract The light yield of a small undoped cesium iodide (CsI) crystal directly coupled with two silicon photomultipliers (SiPMs) at about 77 Kelvin was measured to be $$43.0 \pm 1.1$$ 43.0 ± 1.1 photoelectrons (PE) per keV electron-equivalent (keV $$_\text {ee}$$ ee ) using X and $$\gamma $$ γ -ray peaks from an $$^{241}$$ 241 Am radioactive source from 18 to 60 keV. The high light yield together with some other technical advantages illustrate the great potential of this novel combination for neutrino and low-mass dark matter detection, particularly at accelerator-based neutrino sources, where random background can be highly suppressed by requiring coincident triggers between SiPMs and beam pulse timing signals. Some potential drawbacks of using cryogenic SiPMs instead of photomultiplier tubes (PMTs) were identified, such as worse energy resolution and optical cross-talks between SiPMs. Their influence to rare-event detection was discussed and possible solutions were provided.

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
DOE OSTI2023

COHERENT Collaboration data release from the measurements of CsI[Na] response to nuclear recoils

The data release from the measurements of the CsI[Na] response to low energy nuclear recoils by the COHERENT collaboration. The release corresponds to the results published in 'D. Akimov et al 2022 JINST 17 P10034.' We share the data in the form of raw ADC waveforms, provide benchmark subselections and event reconstruction scripts to enhance the transparency and reproducibility of our results.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2026

AmeriFlux US-WT2 Stratford CSI

This is the AmeriFlux version of the carbon flux data for the site US-WT2 Stratford CSI. Site Description - Winter annual forage production system with grazing

Bednarz, Craig [West Texas A&M University]↗