Results 81 to 90 of about 266,284 (323)

Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays

, 2012
A shock-accelerated particle flux \propto p^-s, where p is the particle momentum, follows from simple theoretical considerations of cosmic-ray acceleration at nonrelativistic shocks followed by rigidity-dependent escape into the Galactic halo.
A. R. Bell, A. R. Bell, C. D. Dermer, Charles D. Dermer, F. W. Stecker, G. F. Krymskii, J. G. Kirk, R. Ramaty, S. Hayakawa, V. L. Ginzburg, V. S. Berezinskii   +10 more
core   +1 more source

Molecular Nanosolids Generation by Vapor Jet Desublimation

Advanced Materials, EarlyView.
A single‐step, solvent‐free approach to fabricate nanoparticles of small organic molecules is demonstrated, using a nitrogen‐propelled vapor jet, enabling tunable particle morphology and crystallinity. Pharmaceutical, flavoring, dyeing and electronics‐relevant molecules are used, demonstrating process generalizability.
Chao Huang, Eva Katharine Pontrelli, Jae Wan Lee, Binyu Wang, Ganlin Chen, Tatiane Cogo Machado, Hemanth Maddali, Benjamin De Chazal, Anish Tuteja, Ronald G. Larson, Naír Rodríguez‐Hornedo, Max Shtein   +11 more
wiley   +1 more source

On the Source Contribution to the Galactic Diffuse Gamma Rays above 398 TeV Detected by the Tibet ASγ Experiment

The Astrophysical Journal Letters
Potential contribution from gamma-ray sources to the Galactic diffuse gamma rays observed above 100 TeV (sub-PeV energy range) by the Tibet AS γ experiment is an important key to interpreting recent multimessenger observations.
S. Kato, D. Chen, J. Huang, T. Kawashima, K. Kawata, A. Mizuno, M. Ohnishi, T. Sako, T. K. Sako, M. Takita, Y. Yokoe   +10 more
doaj   +1 more source

Precision‐Engineered Plasmonic Nanostar Arrays for High‐Performance SERS Sensing

Advanced Optical Materials, EarlyView.
Highly ordered and dose‐controlled arrays of gold nanodiscs are created using the dots‐on‐the‐fly EBL technique and subsequently converted into nanostar arrays. This technique unlocks the reproducible and robust fabrication of highly efficient SERS substrates. Abstract Surface‐enhanced Raman scattering (SERS) spectroscopy has emerged as a powerful tool
Alexandre Chícharo, Alexandra Teixeira, Diogo Moreira, Maria S. Relvas, Marta Aranda, Temple Douglas, Jerôme Borme, Jana B. Nieder, Lorena Diéguez, Sara Abalde‐Cela   +9 more
wiley   +1 more source

Constraints on the origin of the ultra-high energy cosmic-rays using cosmic diffuse neutrino flux limits: An analytical approach

, 2012
Astrophysical neutrinos are expected to be produced in the interactions of ultra-high energy cosmic-rays with surrounding photons. The fluxes of the astrophysical neutrinos are highly dependent on the characteristics of the cosmic-ray sources, such as ...
A. Ishihara, Aya Ishihara, G. T. Zatsepin, G. T. Zatsepin, S. Yoshida, Shigeru Yoshida, T. K. Gaisser   +6 more
core   +1 more source

From Single to Multi‐Glass/Ceramic Microarchitectures via Two‐Photon Lithography

Advanced Optical Materials, EarlyView.
Two‐photon lithography enables precise oxide microarchitectures. A transition is made from single to multi‐glass/ceramic materials by integrating spatially varied compositions via fluidic photoresin exchange. Low‐temperature annealing and optical characterization (i.e., cathodoluminescence, fluorescence microscopy) reveal how post‐treatment affects the
Joel Arriaga‐Dávila, Cristian Rosero‐Arias, Dirk Jonker, Roald Tiggelaar, Huib van Vossen, Han Gardeniers, Manuel Herrera‐Zaldívar, Arturo Susarrey‐Arce   +7 more
wiley   +1 more source

A Discussion on the Origin of the Sub-PeV Galactic Gamma-Ray Emission

The Astrophysical Journal
Galactic diffuse gamma-ray flux measured by the Tibet AS γ experiment and the total Galactic gamma-ray flux measured by the Large High Altitude Air Shower Observatory (LHAASO) are found to be consistent, within the statistical and systematic ...
S. Kato, R. Alves Batista, M. Anzorena, K. Awai, D. Chen, K. Fujita, R. Garcia, J. Huang, G. Imaizumi, T. Kawashima, K. Kawata, A. Mizuno, M. Ohnishi, C. Prévotat, T. Sako, T. K. Sako, F. Sugimoto, M. Takita, Y. Yokoe   +18 more
doaj   +1 more source

Estimation of Radiation Exposure for Various Flights from Athens International Airport

Atmosphere
In recent decades, the exposure of aviation crews and passengers to cosmic radiation has been progressively increasing due to the growing need of flights.
Anastasia Tezari, Argyris N. Stassinakis, Panagiota Makrantoni, Pavlos Paschalis, Dimitris Alexandridis, Maria Gerontidou, Helen Mavromichalaki, Pantelis Karaiskos, Norma Crosby, Mark Dierckxsens   +9 more
doaj   +1 more source

Towards a model of population of astrophysical sources of ultra-high-energy cosmic rays

, 2012
We construct and discuss a toy model of the population of numerous non-identical extragalactic sources of ultra-high-energy cosmic rays. In the model, cosmic-ray particles are accelerated in magnetospheres of supermassive black holes in galactic nuclei ...
G. T. Zatsepin, G. T. Zatsepin, I. D. Novikov, J. Bicak, J. D. Jackson, K. Ptitsyna, K. V. Ptitsyna, N. I. Shakura, O. E. Kalashev, P. Ghosh, R. L. Znajek, S. V. Troitsky, V. S. Berezinsky   +12 more
core   +1 more source

Dual‐Modality Detection of Intracellular Nanoparticles via Smart Polymer‐Enhanced SERS and Hyperspectral Microscopy Detection

Advanced Optical Materials, EarlyView.
Dual‐imaging strategy for PAP‐functionalized gold nanoparticles (PAP@Gold NPs) in HeLa cells. Fast screening is achieved via hyperspectral microscopy based on light reflection to track nanoparticle localization. Accurate detection is performed through SERS microscopy, leveraging the plasmonic enhancement of the PAP polymer signal for precise location ...
Marco Giustra, Brian Novati, Linda Barbieri, Marta Aranda Palomer, Filippo Testa, Lucia Salvioni, Stefania Garbujo, Fabio Corsi, Miriam Colombo, Carlo Morasso, Davide Prosperi   +10 more
wiley   +1 more source