Results 81 to 90 of about 60,044 (291)

Introduction to Astronomy with Radioactivity

, 2010
In the late nineteenth century, Antoine Henri Becquerel discovered radioactivity and thus the physics of weak interactions, well before atomic and quantum physics was known.
Diehl, Roland
core   +1 more source

Entropy‐Driven Spin Transition in Rare Earth Perovskites Enables Feedback Adsorption for Enhanced Acidic Water Oxidation

Advanced Materials, EarlyView.
A synthetic protocol for fabricating high‐entropy rare earth perovskite oxides with abundant lattice distortions and oxygen vacancies has been developed, representing an emerging platform for anchoring RuO2. High entropy strategy significantly modulated the electronic structures and spin states, inducing a shift in the mechanism from the adsorption ...
Yong Jiang, Mingzi Sun, Zhong Liang, Hao Fu, Ziyun Zhong, Bolong Huang, Yaping Du   +6 more
wiley   +1 more source

The Wanderer: Charting WASP-77A b’s Formation and Migration Using a System-wide Inventory of Carbon and Oxygen Abundances

The Astrophysical Journal
The elemental and isotopic abundances of volatiles like carbon, oxygen, and nitrogen may trace a planet’s formation location relative to H _2 O, CO _2 , CO, NH _3 , and N _2 “snowlines,” or the distance from the star at which these volatile elements ...
David R. Coria, Neda Hejazi, Ian J. M. Crossfield, Maleah Rhem   +3 more
doaj   +1 more source

Heavy-ion Fractionation in the Impulsive Solar Energetic Particle Event of 2002 August 20: Elements, Isotopes, and Inferred Charge States [PDF]

, 2010
Measurements of heavy-ion elemental and isotopic composition in the energy range ~12-60 MeV nucleon^(–1) are reported from the Advanced Composition Explorer/Solar Isotope Spectrometer (ACE/SIS) instrument for the solar energetic particle (SEP) event of ...
Cohen, C. M. S., Cummings, A. C., Leske, R. A., Mewaldt, R. A., Stone, E. C., von Rosenvinge, T. T., Wiedenbeck, M. E.   +6 more
core  

A comprehensive study of noble gases and nitrogen in Hypatia, a diamond-rich pebble from SW Egypt [PDF]

, 2015
This is a follow-up study of a work by Kramers et al. (2013) on an unusual diamond-rich rock found in the SW side of the Libyan Desert Glass strewn field. This pebble, called Hypatia, is composed of almost pure carbon.
Andreoli, Marco A. G., Avice, Guillaume, Cartigny, Pierre, Kramers, Jan D., Langenhorst, Falko, Maden, Colin, Marty, Bernard, Meier, Matthias M. M., Wieler, Rainer, Zimmermann, Laurent   +9 more
core   +4 more sources

Isotopic Carbon Abundances in M71

The Astronomical Journal, 1997
High resolution echelle spectra of the 8005 Angstroms CN bands are presented for five bright giants in the globular cluster M71 (C1951 +186, NGC 6838). An analysis of the (13) CN feature included in this region confirms the results of \cite{briley94a}; that the M71 red giants evince low (12}C/({13)) C ratios and that these ratios are correlated with CN
Briley, Michael M, Smith, Verne V, King, Jeremy R, Lambert, David L   +3 more
openaire   +2 more sources

Boosting Seawater Desalination by Ampere‐Level Nitrate Electroreduction On Defect‐Rich Ultrathin RuCu Alloy Nanostructures

Advanced Materials, EarlyView.
Defect engineering of ultrathin RuCu alloy nanostructures has been successfully achieved to enhance ammonia electrosynthesis under indutrial‐level current density. Simultaneously, the stable ampere‐level operation of nitrate electroreduction on defective RuCu nanostructures can drive seawater desalination at an ultrafast salt removal rate, offering an ...
Juan Wang, Liang Guo, Qingbo Wa, Fengkun Hao, Fu Liu, Chaohui Wang, Yunhao Wang, Mingzheng Shao, Yiwei Guo, Guozhi Wang, Xiang Meng, Fangren Qian, Xiuyun Zhang, Chongyi Ling, Shengqi Chu, Zhanxi Fan   +15 more
wiley   +1 more source

NLTE spectroscopic analysis of the $^3$He anomaly in subluminous B-type stars

, 2018
Several B-type main-sequence stars show chemical peculiarities. A particularly striking class are the $^3$He stars, which exhibit a remarkable enrichment of $^3$He with respect to $^4$He.
Heber, U., Irrgang, A., Nieva, M. F., Przybilla, N., Schneider, D.   +4 more
core   +1 more source

New Directions in Focused Ion Beam Induced Deposition for the Nanoprinting of Functional 3D Heterostructures

Advanced Materials Technologies, EarlyView.
Here, it is shown that focused ion beam induced deposition (FIBID) using helium and neon ions enables advanced high‐resolution 3D nanoprinting achieving precise multimaterial architectures and engineered internal voids. Thus, FIBID with finely focused noble gas ion species is presented as a unique platform for designing functional nanomaterials for ...
Frances Isabel Allen
wiley   +1 more source

Evolution of interstellar dust and stardust in the solar neighbourhood

, 2007
The abundance evolution of interstellar dust species originating from stellar sources and from condensation in molecular clouds in the local interstellar medium of the Milky Way is studied and the input of dust material to the Solar System is determined.
Akerman, Alibes, Allende Prieto, Allende Prieto, Alongi, Amari, Amari, Anders, Anders, Basu, Bensby, Bensby, Berczik, Bertelli, Bianchi, Borkowski, Bradley, Bradley, Braun, Bressan, Caffau, Cartledge, Cayrel, Charbonnel, Chiappini, Chiar, Chiosi, Croat, Cunha, Cunha, da Silva, Daflon, Daulton, Delahaye, Demyk, Demyk, Dickey, Dopita, Draine, Dwek, Dwek, Dwek, Dwek, Edmunds, Edvardsson, Elmegreen, Ercolano, Falgarone, Feldman, Ferrarotti, François, Gil-Pons, Goswami, Gratton, Grevesse, H.-P. Gail, Hachisu, Helmi, Hirashita, Hollenbach, Holmberg, Holmgren, Holweger, Hoppe, Hoppe, Inoue, Iwamoto, Jenniskens, Jones, Jones, Jones, Jonsell, Jäger, Karakas, Karakas, Kemper, Kemper, Kennicutt, Kimura, Kimura, Kobayashi, Kozasa, Kroupa, Kroupa, Krumholz, Lamers, Leisawitz, Liffman, Lisenfeld, Lyubimkov, Lyubimkov, M. Trieloff, Mathis, Matteucci, Matzner, McKeegan, Melendez, Mera, Messenger, Messenger, Meynet, Miller, Min, Molster, Morgan, Nguyen, Nomoto, Nordström, Nozawa, Olling, Pollack, Pont, Portinari, Preibisch, Ramírez, Rana, Reddy, Reddy, Reiteri, Rocha-Pinto, Rocha-Pinto, Rolleston, S. Zhukovska, Salpeter, Savage, Scalo, Schaerer, Schaller, Schneider, Smith, Smith, Sofia, Soubiran, Spitzer, Sugerman, Talbot, Tammann, Tielens, Tielens, Tielens, Timmes, Todini, Trampedach, Travaglio, van den Hoek, van der Hucht, van Dishoeck, van Loon, Venn, Vollmer, Vorobyov, Welty, Williams, Woitke, Woosley, Zhao, Zinner, Zolensky, Zubko   +158 more
core   +1 more source