Results 41 to 50 of about 208,249 (317)

Ecotoxicity and Sustainability of Emerging Pb‐Based Photovoltaics

open access: yesSolar RRL, Volume 6, Issue 12, December 2022., 2022
This review provides a unique vision of the ecotoxicity and sustainability of emerging Pb halide perovskite solar cells and Pb chalcogenide quantum dot solar cells. The critical role of Pb, the causes of Pb leakage, the hazardous impact, Pb leakage reduction strategies, and Pb recycling strategies of end‐of‐life solar cells are systematically analyzed.
Xingwen Lu   +6 more
wiley   +1 more source

Gamma-Ray Line Astronomy [PDF]

open access: yesAIP Conference Proceedings, 2005
9 pages, 5 figures; invited review at "Nuclei in the Cosmos 8", Vancouver, CA; accepted for publication in Nucl Phys ...
openaire   +4 more sources

The Photophysics of Nucleic Acids: Consequences for the Emergence of Life

open access: yesChemSystemsChem, Volume 5, Issue 1, January 2023., 2023
Photochemical reactions in nucleic acids induced by ultraviolet (UV) radiation could have played an important role in the prebiotic selection of the building blocks of life. This Review summarizes the quantum efficiencies of the photorelaxation pathways of nucleic acids and discusses its implications for the emergence of an initial sequence pool on ...
Corinna L. Kufner   +2 more
wiley   +1 more source

Advanced γ-Ray Emission Studies of G15.4+0.1 with Fermi-LAT: Evidence of Escaping Cosmic Rays Interacting with Surrounding Molecular Clouds

open access: yesThe Astrophysical Journal, 2023
We present an analysis of γ -ray emission in the direction of supernova remnant (SNR) G15.4+0.1 with 13 yr Fermi Large Area Telescope data. There are three point-like GeV sources in this region: one is spatially coincident with the TeV source HESS J1818 ...
Yuan Li, Yuliang Xin, Siming Liu, Yu He
doaj   +1 more source

The Mastcam‐Z Radiometric Calibration Targets on NASA's Perseverance Rover: Derived Irradiance Time‐Series, Dust Deposition, and Performance Over the First 350 Sols on Mars

open access: yesEarth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract The Mastcam‐Z radiometric calibration targets mounted on the NASA's Perseverance rover proved to be effective in the calibration of Mastcam‐Z images to reflectance (I/F) over the first 350 sols on Mars. Mastcam‐Z imaged the calibration targets regularly to perform reflectance calibration on multispectral image sets of targets on the Martian ...
M. Merusi   +19 more
wiley   +1 more source

In vivo dosimetry for proton therapy: A Monte Carlo study of the Gadolinium spectral response throughout the course of treatment. [PDF]

open access: yesMed Phys
Abstract Background In proton radiotherapy, the steep dose deposition profile near the end of the proton's track, the Bragg peak, ensures a more conformed deposition of dose to the tumor region when compared with conventional radiotherapy while reducing the probability of normal tissue complications.
Brás M   +3 more
europepmc   +2 more sources

Possible Evidence for Lorentz Invariance Violation in Gamma-Ray Burst 221009A

open access: yesThe Astrophysical Journal Letters, 2023
The preliminary detections of the gamma-ray burst 221009A up to 18 TeV by LHAASO and up to 251 TeV by Carpet 2 have been reported through Astronomer’s Telegrams and Gamma-ray Coordination Network circulars.
Justin D. Finke, Soebur Razzaque
doaj   +1 more source

The future of astronomy with small satellites [PDF]

open access: yesNature Astronomy volume 4, pages 1031-1038 (2020), 2020
The number of small satellites has grown dramatically in the past decade from tens of satellites per year in the mid-2010s to a projection of tens of thousands in orbit by the mid-2020s. This presents both problems and opportunities for observational astronomy.
arxiv   +1 more source

Eventdisplay: An Analysis and Reconstruction Package for Ground-based Gamma-ray Astronomy [PDF]

open access: yes, 2017
Eventdisplay is a software package for the analysis and reconstruction of data and Monte Carlo events from ground-based gamma-ray observatories such as VERITAS and CTA.
G. Maier, J. Holder
semanticscholar   +1 more source

Revision of the γ-Ray Emission from SNR CTB 109 with the Fermi Large Area Telescope

open access: yesThe Astrophysical Journal, 2023
CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. We reanalyze the GeV γ -ray emission from CTB 109 using 13 yr of Pass 8 data recorded by the Fermi Large Area Telescope.
Yuliang Xin, Qizhen Zhao, Xiaolei Guo
doaj   +1 more source

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