Results 111 to 120 of about 201,431 (246)

Review of the anatomical basis for predicting plutonium alpha particle radiation induced osteogenic cancers

The Anatomical Record, Volume 308, Issue 12, Page 3197-3229, December 2025.
Abstract Plutonium was discovered and first synthesized in the early 1940's. Several isotopes of plutonium are used in nuclear technologies, 238Pu for heat generation and 239Pu for energy production and weapons. Both isotopes emit alpha particles, which pose a significant radiation hazard when incorporated into the body.
Scott C. Miller
wiley   +1 more source

Supernova Remnant Kes 17: Efficient Cosmic Ray Accelerator inside a Molecular Cloud

, 2012
Supernova remnant Kes 17 (SNR G304.6+0.1) is one of a few but growing number of remnants detected across the electromagnetic spectrum. In this paper, we analyze recent radio, X-ray, and gamma-ray observations of this object, determining that efficient ...
Castro, Daniel, Gelfand, Joseph D., Hughes, John P., Rakowski, Cara, Slane, Patrick O., Temim, Tea   +5 more
core   +1 more source

A Small Pathbreaking Spacecraft: Giants of Space Research (Bernard Blake, Dieter Hovestadt, and Edward Stone)

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley   +1 more source

The origin of cosmic rays and TeV gamma-ray astronomy

EPJ Web of Conferences, 2013
Cosmic rays are accelerated to high energies in Galactic and extragalactic objects like Supernova remnants (SNR) and active galactic nuclei (AGN). How these accelerators work and how efficient they accelerate different types of particles to energies of ...
Maier Gernot
doaj   +1 more source

Stochastic Electron Acceleration in Shell-Type Supernova Remnants II

, 2008
We discuss the generic characteristics of stochastic particle acceleration by a fully developed turbulence spectrum and show that resonant interactions of particles with high speed waves dominate the acceleration process.
Aharonian, Becker, Boldyrev, Butt, Christopher L. Fryer, Decourchelle, Fan, Hughes, Hui Li, Jian-Min Wang, Jiang, Lazendic, Liu, McEnery, Petrosian, Porter, Quataert, Siming Liu, Stawarz, Stix, Takahashi, Takahashi, Wang, Zhong-Hui Fan   +23 more
core   +1 more source

Radar Polarimetry in Glaciology: Theory, Measurement Techniques, and Scientific Applications for Investigating the Anisotropy of Ice Masses

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract Dielectric anisotropy in ice alters the propagation of polarized radio waves, so polarimetric radar sounding can be used to survey anisotropic properties of ice masses. Ice anisotropy is either intrinsic, associated with ice‐crystal orientation fabric (COF), or extrinsic, associated with material heterogeneity, such as bubbles, fractures, and ...
Benjamin H. Hills, T. J. Young, David A. Lilien, Esther Babcock, Nicole Bienert, Donald Blankenship, John Bradford, Giancorrado Brighi, Alex Brisbourne, Jørgen Dall, Reinhard Drews, Olaf Eisen, M. Reza Ershadi, Tamara A. Gerber, Nicholas Holschuh, Daniela Jansen, Thomas M. Jordan, Nanna B. Karlsson, Jilu Li, Carlos Martín, Kenichi Matsuoka, Daniel May, Falk M. Oraschewski, John Paden, Nicholas M. Rathmann, Neil Ross, Dustin M. Schroeder, Martin Siegert, Matthew R. Siegfried, Emma Smith, Ole Zeising   +30 more
wiley   +1 more source

Young core collapse supernova remnants and their supernovae

, 2004
Massive star supernovae can be divided into four categories depending on the amount of mass loss from the progenitor star and the star's radius: red supergiant stars with most of the H envelope intact (SN IIP), stars with some H but most lost (IIL, IIb),
Bandiera R., Cappellaro E., Cappellaro E., Dwarkadas V., Garcia-Segura G., Green D. A., Green D. A., Lyne A. G., Meaburn J., Murdin P., Oliva E., Rees M. J., Roger A. Chevalier, Schaller G., Wellstein S.   +14 more
core   +3 more sources

Oxychlorine Species on Mars: A Review

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract Oxychlorine species (mainly perchlorate and chlorate) have been identified at multiple locations on the surface of Mars by both orbiter and in situ rovers. They have also been found in martian meteorites. Cl‐isotopes in meteoritic minerals suggest that an oxychlorine cycle has been operating on the martian surface for the last ∼4 billion years.
Kaushik Mitra
wiley   +1 more source

Water‐Mediated 1,7‐Palladium Aryl‐to‐Aryl Migration in an Unusual Aryne Trimerization Enables the Synthesis of Multihelicenes with Profoundly Hindered Stereogenic Axes

Advanced Synthesis &Catalysis, Volume 367, Issue 21, November 13, 2025.
In the presence of a Pd0 catalyst, large π‐extended arynes trimerize in an unusual manner to forge extremely compact and strained chiral benzenoids. This new trimerization reaction involves a 1,7‐Pd isomerization, a rare and poorly understood process that is elucidated.
Albert Artigas, Manuel A. Ortuño, Jesús Castro‐Esteban, Michel Giorgi, Diego Peña, Dolores Pérez, Yoann Coquerel   +6 more
wiley   +1 more source

Time Evolution of the Synchrotron X-Ray Emission in Kepler’s Supernova Remnant: The Effects of Turbulence and Shock Velocity

The Astrophysical Journal
The maximum energy of electrons in supernova remnant (SNR) shocks is typically limited by radiative losses, where the synchrotron cooling time equals the acceleration time.
Vincenzo Sapienza, Marco Miceli, Oleh Petruk, Aya Bamba, Satoru Katsuda, Salvatore Orlando, Fabrizio Bocchino, Tracey DeLaney   +7 more
doaj   +1 more source