Results 81 to 90 of about 131,222 (227)

Non-explosive hydrogen and helium burnings: Abundance predictions from the NACRE reaction rate compilation [PDF]

, 1999
The abundances of the isotopes of the elements from C to Al produced by the non-explosive CNO, NeNa and MgAl modes of hydrogen burning, as well as by helium burning, are calculated with the thermonuclear rates recommended by the European compilation of ...
Arnould, M., Goriely, S., Jorissen, A.
core   +1 more source

Understanding nuclear astrophysics [PDF]

Nature, 1980
An Introduction to Nuclear Astrophysics. By Jean Audouze and Sylvie Vauclair. Pp.168. (Reidel: 1980.) Hardback Dfl.75, $39.50; paperback Dfl.40, $19.95.
openaire   +1 more source

Static recrystallization of shocked calcite in Ries impact breccias

Meteoritics &Planetary Science, EarlyView.
Abstract Calcite is prone to chemical and microstructural modifications, especially after having been strained at high stresses and strain rates, as during hypervelocity impact events. These modifications include precipitation from pore fluid as well as replacement of strained volumes by recrystallization. In calcite aggregates of a metagranite breccia
Claudia A. Trepmann, Fabian Dellefant, Lina Seybold, Wolfgang W. Schmahl, Elena Sturm, Daniel Weidendorfer, Sandro Jahn, Iuliia V. Sleptsova, Stuart A. Gilder   +8 more
wiley   +1 more source

Nuclear inputs relevant to nuclear astrophysics, status and perspectives [PDF]

EPJ Web of Conferences
Nuclear physics influences are present throughout the Universe at every scale. Over the past decades, significant efforts have been dedicated to various fields related to nucleosynthesis and stellar evolution.
Goriely Stéphane, Ryssens Wouter, Hilaire Stéphane, Péru Sophie   +3 more
doaj   +1 more source

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

In situ single‐spot Rb/Sr cosmochronology of roedderite in the Ribbeck aubrite (asteroid 2024 BX1)

Meteoritics &Planetary Science, EarlyView.
Abstract The mineralogy and textures of several fragments from the Ribbeck aubrite were analyzed using a combination of scanning electron microscopy, electron microprobe analysis, μRaman spectroscopy, and laser ablation inductively coupled reaction cell mass spectrometry (LA‐ICP‐MS/MS).
Christopher J. Barnes, Aleksander Błasiak, Helge Vinje Birgerheim, Matthias Konrad‐Schmolke, Delia Rösel, Jarosław Majka, Thomas Zack   +6 more
wiley   +1 more source

First direct measurement of 12C(12C,n)23Mg at stellar energies

EPJ Web of Conferences, 2016
Neutrons produced by the carbon fusion reaction 12C(12C,n)23Mg play an important role in stellar nucleosynthesis. Past studies have shown large discrepancies between experimental data and theory, leading to an uncertain cross section extrapolation at ...
Tang X.D., Bucher B., Fang X., Heger A., Almaraz-Calderon S., Alongi A., Ayangeakaa A.D., Beard M., Best A., Browne J., Cahillane C., Couder M., deBoer R.J., Kontos A., Lamm L., Li Y.J., Long A., Lu W., Lyons S., Notani M., Patel D., Paul N., Pignatari M., Roberts A., Robertson D., Smith K., Stech E., Talwar R., Tan W.P., Wiescher M., Woosley S.E.   +30 more
doaj   +1 more source

The n_ToF facility for Nuclear Astrophysics [PDF]

EPJ Web of Conferences
Neutron-induced reactions involved in cosmological and stellar nucleosynthesis processes, represent key inputs for astrophysical models of the chemical evolution of the universe.
Cosentino Luigi, Massimi Cristian
doaj   +1 more source

CI chondrite Oued Chebeika 002 links asteroids Bennu and Ryugu to common parent body

Meteoritics &Planetary Science, EarlyView.
Abstract CI chondrites are a compositionally primitive group of meteorites that have undergone extensive aqueous alteration, providing insights into the evolution of primitive planetesimals. Oued Chebeika 002 is the most pristine CI chondrite to date.
Megan Broussard, Katharina Lodders, Paul K. Carpenter, Piers Koefoed, Karen Ziegler, Kunihiko Nishiizumi, Marc W. Caffee, Laurence A. J. Garvie, Ryan C. Ogliore, Anthony J. Irving, Bradley L. Jolliff, Kun Wang   +11 more
wiley   +1 more source

Constant temperature description of the nuclear level densities

, 2017
The spin and parity dependent nuclear level densities (NLD) are calculated for medium-heavy nuclei using shell model techniques. The NLD are used to calculate cross sections and reaction rates of interest for nuclear astrophysics and nuclear energy ...
Dissanayake, Jayani, Horoi, Mihai
core   +1 more source