Results 51 to 60 of about 465,421 (347)

Gamma radiation by neutralino stars [PDF]

Physics Letters A, 1997
A new model of gamma radiation (GR) generated by neutralino annihilation in neutralino stars (NeS) is proposed. Diffuse Galactic and extragalactic GR is calculated for this model and is shown to be in a reasonable agreement with observations. The point source component (P) is picked out among nonidentified discrete gamma sources from EGRET catalog ...
Gurevich, A. V., Zybin, K. P.
openaire   +2 more sources

Exploring Microstructure–Physical Property–Corrosion Response Relationship in Intermetallic Compounds of Al‐Cu Bimetallic Interfaces

Advanced Engineering Materials, EarlyView.
Al‐Cu intermetallic compounds (IMCs) have a significant influence on the properties of Al‐Cu bimetallic interfaces formed in compound casting. This article provides a deeper understanding of microstructure, crystallography, thermal properties, hardness, and corrosion response of Al‐Cu IMCs with the goal of facilitating the optimization of the ...
Alireza Nazarahari, Tatiana Blank, Christian Hinte, Huseyin Can Ozdemir, Khemais Barienti, Christian Klose, Dermican Canadinc, Hans Jürgen Maier   +7 more
wiley   +1 more source

Formation of hard VHE gamma-ray spectra of blazars due to internal photon-photon absorption

, 2008
The energy spectra of TeV gamma-rays from blazars, after being corrected for intergalatic absorption in the Extragalactic Background Light (EBL), appear unusually hard, a fact that poses challenges to the conventional models of particle acceleration in ...
Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Albert, Begelman, Cambresy, Celotti, D. Khangulyan, Dole, Fazio, Felix A. Aharonian, Finkbeiner, Gould, Hauser, Hauser, Jelley, Jorstad, Kashlinsky, Katarzynski, Khangulyan, Kifune, Krawczynski, L. Costamante, Lagage, Madau, Mapelli, Mazin, Moderski, Nikishov, Pian, Primack, Protheroe, Schlegel, Stecker, Urry, Wright   +41 more
core   +1 more source

Recent Advancements in Bulk Processing of Rare‐Earth‐Free Hard Magnetic Materials and Related Multiscale Simulations

Advanced Engineering Materials, EarlyView.
This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley   +1 more source

Photon-induced Nucleosynthesis: Current Problems and Experimental Approaches

, 2007
Photon-induced reactions play a key role in the nucleosynthesis of rare neutron-deficient p-nuclei. The paper focuses on (gamma,alpha), (gamma,p), and (gamma,n) reactions which define the corresponding p-process path.
Arnould, Arnould, Atzrott, Avrigeanu, Axel, Bartholomew, Baur, Bork, Chloupek, Daly, Demetriou, Fröhlich, Fujimoto, Fülöp, Fülöp, Galanopoulos, Galaviz, Gledenov, Goko, Goriely, Gyürky, Gyürky, Gyürky, Gyürky, H. Utsunomiya, Hahn, Harissopulos, Harissopulos, Hayakawa, Ito, Koehler, Kopecky, Laird, Lambert, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, Mohr, P. Mohr, Prantzos, Pruet, Rapp, Rapp, Rauscher, Rauscher, Rauscher, Rauscher, Rayet, Rayet, Sauter, Shizuma, Somorjai, Sonnabend, Sonnabend, Tanaka, Teichert, Tsagari, Utsunomiya, Utsunomiya, Utsunomiya, Utsunomiya, Verdieck, Vogt, Wallerstein, Weller, Woosley, Zs. Fülöp, Özkan, Özkan   +76 more
core   +1 more source

Compton rockets and the minimum power of relativistic jets [PDF]

, 2010
The power of a relativistic jet depends on the number of leptons and protons carried by the jet itself. We have reasons to believe that powerful gamma-ray flat spectrum radio sources emit most of their radiation where radiative cooling is severe.
Abdo, Ackermann, Bentz, Bonnoli, Celotti, Celotti, Dermer, F. Tavecchio, Foschini, G. Ghisellini, Georganopoulos, Ghisellini, Ghisellini, Ghisellini, Ghisellini, Ghisellini, Giommi, Jackson, Jorstad, Kaspi, Lister, Marscher, O'Dell, Pian, Rybicki, Sikora, Sikora, Sikora, Sikora, Tavecchio, Tavecchio, Tosti, Vercellone, Vercellone, Villata   +34 more
core   +1 more source

Microstructural Evolution and Mechanical Performance of Plasma‐Assisted Hybrid Friction Stir Welded Dissimilar Aluminum–Copper Joints

Advanced Engineering Materials, EarlyView.
Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi, Pankaj Shrivastava, Ganesh Chouhan, Velaphi Msomi   +3 more
wiley   +1 more source

Influence of Pre-Radiation and Photo-Bleaching on the Yb-Doped Fiber Laser Radiated with Gamma-ray

Applied Sciences, 2023
To improve the radiation resistance of Yb-doped fiber lasers, we investigate the influence of pre-radiation and photo-bleaching on the gamma-radiated laser’s performance. When the gamma radiation dose is within 10 krad(Si) with a radiation dose rate less
Xuefeng Wang, Shihao Sun, Ye Zheng, Miao Yu, Siyuan Li, Yi Cao, Junlong Wang   +6 more
doaj   +1 more source

Non-variable cosmologically distant gamma-ray emitters as an imprint of propagation of ultra-high-energy protons

, 2011
The acceleration cites of ultra-high-energy (UHE) protons can be traced by the footprint left by these particles propagating through cosmic microwave background (CMB) radiation.
A. Yu. Prosekin, Aharonian, Aharonian, Aharonian, Ando, Atwood, Blasi, Dermer, Dolag, Dolag, Essey, F. A. Aharonian, Franceschini, Gabici, Kelner, Kotera, Lehmer, Neronov, Neronov, Romano, Ryu, S. R. Kelner, Sigl, Tavecchio, Taylor   +24 more
core   +1 more source

Design and Prototyping of Topology‐Optimized, Additively Manufactured Lightweight Components for Space Robotic Systems: A Case Study

Advanced Engineering Materials, EarlyView.
The results demonstrate a simulation‐driven workflow that applies LSB topology optimization with additive manufacturing constraints to mission‐specific load cases, integrating European Cooperation for Space Standardization compliant verification and manufacturability to develop structurally efficient rover suspension components.
Stelios K. Georgantzinos, Grigorios Kostopoulos, Eleni Papadopoulou, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria N. Gkara, Chara Ch. Mitropoulou, Georgios Kazakis, Alin Munteanu, Jeremi Gancet, Nikos D. Lagaros   +11 more
wiley   +1 more source