Results 41 to 50 of about 112,099 (203)
Meteoritics &Planetary Science, Volume 53, Issue 2, Page 167-186, February 2018., 2018 Abstract New Tl, Pb, and Cd concentration and Tl, Pb isotope data are presented for enstatite as well as L‐ and LL‐type ordinary chondrites, with additional Cd stable isotope results for the former. All three chondrite suites have Tl and Cd contents that vary by more than 1–2 orders of magnitude but Pb concentrations are more uniform, as a result of ...
Emeliana Palk +7 more
wiley +1 more source
Presupernova O–C Shell Mergers Could Produce More 44Ti than the Explosion
The Astrophysical JournalThe formation of ^44 Ti in massive stars is thought to occur during explosive nucleosynthesis; however, recent studies have shown it can be produced during O–C shell mergers prior to core collapse.
Joshua Issa, Falk Herwig
doaj +1 more source
, 2000 We have measured the Sm-147(n, alpha) cross section from 3 eV to 500 keV. These data were used to test nuclear statistical models which must be relied on to calculate the rates for as yet unmeasurable reactions occurring in explosive nucleosynthesis ...
Andrzejewski, J. +4 more
core +5 more sources
Origin of geochemical mantle components: Role of spreading ridges and thermal evolution of mantle
Geochemistry, Geophysics, Geosystems, Volume 18, Issue 2, Page 697-734, February 2017., 2017 Abstract We explore the element redistribution at mid‐ocean ridges (MOR) using a numerical model to evaluate the role of decompression melting of the mantle in Earth's geochemical cycle, with focus on the formation of the depleted mantle component. Our model uses a trace element mass balance based on an internally consistent thermodynamic‐petrologic ...
Jun‐Ichi Kimura +4 more
wiley +1 more source
Snowflakes in a Furnace: Formation of CO and Dust in a Recurrent Nova Eruption
The Astrophysical Journal Letters, 2023 We report the detection of carbon monoxide (CO) and dust, formed under hostile conditions, in recurrent nova V745 Sco about 8.7 days after its 2014 outburst. The formation of molecules or dust has not been recorded previously in the ejecta of a recurrent
D. P. K. Banerjee +9 more
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Consistency of cosmic-ray source abudances with explosive nucleosynthesis [PDF]
, 1973 A model was examined in which the cosmic ray abundances of elements from C to Fe are consistent with explosive nucleosynthesis. The observed abundance of cosmic rays near the earth, cosmic ray source abundance, and solar system abundance are discussed ...
Ramaty, R., Kozlovsky, B.
core
Mass‐Loss, Composition and Observational Signatures of Stellar Winds From X‐Ray Bursts
Astronomische Nachrichten, Volume 346, Issue 1, January 2025.ABSTRACT X‐Ray bursts (XRBs) are powerful thermonuclear events on the surface of accreting neutron stars (NSs), which can synthesize intermediate‐mass elements. Although the high surface gravity prevents an explosive ejection, a small fraction of the envelope may be ejected by radiation‐driven winds.
Yago Herrera +4 more
wiley +1 more source
Advances in High Energy Physics, Volume 2017, Issue 1, 2017., 2017 We investigate matter creation processes during the reheating period of the early Universe, by using the thermodynamic of open systems. The Universe is assumed to consist of the inflationary scalar field, which, through its decay, generates relativistic matter and pressureless dark matter. The inflationary scalar field transfers its energy to the newly
Juntong Su +3 more
wiley +1 more source
Evolution, Explosion, and Nucleosynthesis of Core‐Collapse Supernovae
The Astrophysical Journal, 2003 We present a new set of presupernova evolutions and explosive yields of massive stars of initial solar composition (Y=0.285, Z=0.02) in the mass range 13-35 Msun. All the models have been computed with the latest version (4.97) of the FRANEC code that now includes a nuclear network extending from neutrons to Mo98. The explosive nucleosynthesis has been
Limongi, Marco, Chieffi, Alessandro
openaire +5 more sources
Geostandards and Geoanalytical Research, Volume 48, Issue 4, Page 863-885, December 2024.Key Points A method is described to obtain high precision Sn isotope ratios using the double spike technique in geological reference materials containing 0.03 to 7 μg g−1 of Sn. δ122/118Sn values are reported for sixteen geological RMs. Improved precision was achieved compared with previous studies by using low concentration Sn analyte.
Dipankar Pathak, Klaus Mezger
wiley +1 more source