Results 41 to 50 of about 8,426 (297)

ON THE THEORY OF GAMMA RAY BURSTS AND HYPERNOVAE: THE BLACK HOLE SOFT X-RAY TRANSIENT SOURCES

International Journal of Modern Physics A, 2003
We show that a common evolutionary history can produce the black hole binaries in the Galaxy in which the black holes have masses of ~ 5 - 10M⊙. In the black hole binaries with low-mass, ≲ 2.5M⊙ ZAMS (zero age main sequence) companions, the latter remain in main sequence during the active stage of soft X-ray transients (SXT's), most of them being of K
Lee, Chang-Hwan, Brown, Gerald E.
openaire   +2 more sources

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Naked Forward Shock Seen in the TeV Afterglow Data of GRB 221009A

The Astrophysical Journal
We explore the implications of the light curve of the early TeV gamma-ray afterglow of GRB 221009A reported by the LHAASO Collaboration. We show that the reported offset of the reference time, T _* , allows the determination of the activation time of the
Dmitry Khangulyan, Felix Aharonian, Andrew M. Taylor   +2 more
doaj   +1 more source

An Aerial Gamma Ray Survey of Springfields and the Ribble Estuary in September 1992 [PDF]

, 1992
<p>A short aerial gamma ray survey was conducted in the vicinity of the Springfields site and Ribble Estuary from 1st-5th September 1992, to define existing background radiation levels, against which any future changes can be assessed.
Murphy, S., Sanderson, D.C.W., Tyler, A.N., University of Glasgow: Scottish Universities Research and Reactor Centre, Allyson, J.D.   +4 more
core  

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

An Airborne Gamma Ray Survey of Parts of SW Scotland in February 1993. Final Report [PDF]

, 1993
An airborne gamma ray survey was conducted for the Scottish Office Environment Department of coastal and inland parts of SW Scotland to define existing background levels, to locate features worthy of further attention, and to demonstrate the emergency ...
Sanderson, D., Murphy, S., Tyler, A.N., Ni Riain, S., University of Glasgow: Scottish Universities Research and Reactor Centre, Allyson, J.D.   +5 more
core  

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet

The Astrophysical Journal
The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity.
S.-X. Yi, C.-W. Wang, X. Shao, R. Moradi, H. Gao, B. Zhang, S.-L. Xiong, S.-N. Zhang, W.-J. Tan, J.-C. Liu, W.-C. Xue, Y.-Q. Zhang, C. Zheng, Y. Wang, P. Zhang, Z.-H. An, C. Cai, P.-Y. Feng, K. Gong, D.-Y. Guo, Y. Huang, B. Li, X.-B. Li, X.-Q. Li, X.-J. Liu, Y.-Q. Liu, X. Ma, W.-X. Peng, R. Qiao, L.-M. Song, J. Wang, P. Wang, Y. Wang, X.-Y. Wen, S. Xiao, Y.-B. Xu, S. Yang, Q.-B. Yi, D.-L. Zhang, F. Zhang, H.-M. Zhang, J.-P. Zhang, Z. Zhang, X.-Y. Zhao, Y. Zhao, S.-J. Zheng   +45 more
doaj   +1 more source

Effects of dead time losses on terrestrial gamma ray flash measurements with the Burst and Transient Source Experiment [PDF]

Journal of Geophysical Research: Space Physics, 2010
Measurements from the Burst and Transient Source Experiment (BATSE) instrument on the Compton Gamma Ray Observatory (CGRO) are the only ones where characteristics of single terrestrial gamma ray flashes (TGFs) have been obtained thus far. However, it has been reported that the measurements suffer from significant dead time losses which complicates the ...
Gjesteland, Thomas, Østgaard, Nikolai, Connell, P. H., Stadsnes, J., Fishman, G. J.   +4 more
openaire   +3 more sources