Results 81 to 90 of about 208,249 (317)

Gamma-Ray Astronomy from the Ground [PDF]

, 2016
The observation of cosmic gamma-rays from the ground is based upon the detection of gamma-ray initiated air showers. At energies between approximately 1011 eV and 1013 eV, the imaging air Cherenkov technique is a particularly successful approach to ...
D. Horns
semanticscholar   +1 more source

A Review of Ga₂O₃ Heterojunctions for Deep‐UV Photodetection: Current Progress, Methodologies, and Challenges

Advanced Electronic Materials, EarlyView.
This paper provides a comprehensive review of the existing literature related to the fundamentals of gallium oxide (Ga2O3), growth methods, substrates, and particularly a focused examination of Ga2O3‐based heterojunctions. Particular attention has also been given to the state‐of‐the‐art Ga2O3‐based heterojunctions for photodetectors. The key challenges
Alfred Moore, Saqib Rafique, Ciaran Llewelyn, Dan Lamb, Lijie Li   +4 more
wiley   +1 more source

Upper Limits on the Gamma-Ray Emission from the Microquasar V4641 Sgr

The Astrophysical Journal
Following a recent detection of TeV radiation by the Large High Altitude Air Shower Observatory and the High-Altitude Water Cherenkov Observatory, coincident with the direction of the microquasar V4641 Sgr, we search for possible GeV emission from this ...
Zihao Zhao, Jian Li, Diego F. Torres
doaj   +1 more source

Determining Exciton Diffusion Length in Organic Semiconductors: Unifying Macro‐ and Microscopic Perspectives

Advanced Energy Materials, EarlyView.
Exciton diffusion length in organic semiconductor films is determined from encounter/annihilation rates. Non‐normalized exciton densities and proper intrinsic lifetime reference avoid over‐parametrization of the fits. Monte Carlo Simulation of individual molecule‐to‐molecule hops reproduce these results (②) when matching lattice constant and hoping ...
Wenchao Yang, Catherine S. Pursglove De Castro, Safakath Karuthedath, Yuliar Firdaus, Nisreen Alshehri, Si Chen, Diego Rosas Villalva, Christopher E. Petoukhoff, Amr Dahman, Derya Baran, Thomas D. Anthopoulos, Frédéric Laquai, Julien Gorenflot   +12 more
wiley   +1 more source

Analysis Methods for Gamma-Ray Astronomy

, 2023
The launch of the Fermi satellite in 2008, with its Large Area Telescope (LAT) on board, has opened a new era for the study of gamma-ray sources at GeV ($10^9$ eV) energies. Similarly, the commissioning of the third generation of imaging atmospheric Cherenkov telescopes (IACTs) - H.E.S.S., MAGIC, and VERITAS - in the mid-2000's has firmly established ...
Malyshev, Denys, Mohrmann, Lars
openaire   +2 more sources

The TAIGA experiment: from cosmic ray to gamma-ray astronomy in the Tunka valley

, 2016
The physical motivations and advantages of the new gamma-observatory TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) is presented.
N. Budnev, I. Astapov, P. Bezyazeekov, A. Bogdanov, V. Boreyko, M. Büker, M. Brückner, A. Chiavassa, O. Chvalaev, O. Gress, T. Gress, O. Grishin, A. Dyachok, S. Epimakhov, O. Fedorov, A. Gafarov, N. Gorbunov, V. Grebenyuk, A. Grinuk, A. Haungs, R. Hiller, D. Horns, T. Huege, A. Ivanova, A. Kalinin, N. Karpov, N. Kalmykov, Y. Kazarina, N. Kirichkov, S. Kiryuhin, M. Kleifges, R. Kokoulin, K. Komponiest, A. Konstantinov, E. Korosteleva, D. Kostunin, V. Kozhin, O. Krömer, M. Kunnas, L. Kuzmichev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, R. Nachtigall, A. Pakhorukov, M. Panasyuk, L. Pankov, A. Perevalov, A. Petrukhin, V. Platonov, V. Poleschuk, E. Popova, A. Porelli, V. Prosin, V. Ptuskin, G. Rubtsov, A. Pushnin, V. Samoliga, P. Satunin, F. Schröder, Y. Semeney, A. Silaev, A. Skurikhin, V. Slucka, C. Spiering, L. Sveshnikova, V. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, D. Voronin, R. Wischnewski, A. Zagorodnikov, V. Zurbanov, I. Yashin   +78 more
semanticscholar   +1 more source

Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells

Advanced Energy Materials, EarlyView.
Organic photovoltaics are a promising solar cell technology, but even the record devices with 20% efficiency have significant fill factor losses due to low active layer conductivities. In this Perspective, the authors describe the origin of these losses, discuss experimental methods for their quantification, and explain how to minimize them to optimize
Chen Wang, Roderick C. I. MacKenzie, Uli Würfel, Dieter Neher, Thomas Kirchartz, Carsten Deibel, Maria Saladina   +6 more
wiley   +1 more source

Synthesis and Characterization of Fe‐Phthalocyanine‐Based Metal–Organic Framework

Advanced Physics Research, EarlyView.
A 2D layered material FePc‐MOF with Fe‐phthalocyanine backbone as a building unit is synthesized, which is a promising candidate for Lieb lattice. Lieb lattice is a type of Dirac materials that has been theoretically predicted to have a unique electronic structure for a long time, but it has never been synthesized as a real material.
Hiroto Oi, Momoka Isobe, Riko Kishikawa, Fumiya Abe, Norihiro Morishita, Shunsuke Takagi, Shota Nakayama, Kaname Kanai   +7 more
wiley   +1 more source

Scanning K-edge subtraction (SKES) imaging with laser-compton x-ray sources. [PDF]

Med Phys
Abstract Background K‐edge subtraction (KES) imaging is a dual‐energy imaging technique that enhances contrast by subtracting images taken with x‐rays that are above and below the K‐edge energy of a specified contrast agent. The resulting reconstruction spatially identifies where the contrast agent accumulates, even when obscured by complex and ...
Reutershan T, Nguyen CV, Effarah HH, Nelson EC, Chesnut KD, Barty CPJ.   +5 more
europepmc   +2 more sources

Altermagnetism in NiSi and Antiferromagnetic Candidate Materials with Non‐Collinear Spins

Advanced Physics Research, EarlyView.
Altermagnetism has emerged as new class of phenomena in magnetic materials. But experimental evidences to the theoretically proposed concept is still scarce. That's because the research is mostly focused on collinear antiferromagnets and ignoring the vast landscape rendered by non‐collinear spin correlation.
Deepak K. Singh, Sang‐Wook Cheong, Jiasen Guo   +2 more
wiley   +1 more source