Results 91 to 100 of about 48,557 (214)

Direct and Indirect Measurements of the ¹⁹F(p,α)¹⁶O Reaction at Astrophysical Energies Using the LHASA Detector and the Trojan Horse Method

Universe
Fluorine is one of the most interesting elements in nuclear astrophysics. Its abundance can provide important hints to constrain the stellar models since fluorine production and destruction are strictly connected to the physical conditions inside the ...
Giovanni L. Guardo, Giuseppe G. Rapisarda, Dimiter L. Balabanski, Giuseppe D’Agata, Alessia Di Pietro, Pierpaolo Figuera, Marco La Cognata, Marco La Commara, Livio Lamia, Dario Lattuada, Catalin Matei, Marco Mazzocco, Alessandro A. Oliva, Sara Palmerini, Teodora Petruse, Rosario G. Pizzone, Stefano Romano, Maria Letizia Sergi, Roberta Spartá, Xuedou Su, Aurora Tumino, Nikola Vukman   +21 more
doaj   +1 more source

Coulomb screening in linear coasting nucleosynthesis

, 2015
We investigate the impact of coulomb screening on primordial nucleosynthesis in a universe having scale factor that evolves linearly with time. Coulomb screening affects primordial nucleosynthesis via enhancement of thermonuclear reaction rates.
Lohiya, Daksh, Singh, Parminder
core  

Neutrino Oscillations and the Early Universe

, 2003
The observational and theoretical status of neutrino oscillations in connection with solar and atmospheric neutrino anomalies is presented in brief. The effect of neutrino oscillations on the early Universe evolution is discussed in detail.
A. Aguilar, A. Balantekin, A. Bandyopadhyay, A. Bazarko, A. Coc, A. D. Dolgov, A. D. Dolgov, A. D. Dolgov, A. D. Dolgov, A. D. Dolgov, A. Dolgov, A. Dolgov, B. Pontecorvo, D. Kirilova, D. Kirilova, D. Kirilova, D. Kirilova, D. Kirilova, D. Kirkman, D. Spergel, E. Lisi, G. Bono, G. Fogli, G. Fogli, G. Gamow, G. Gyuk, G. Raffelt, G. Steigman, J. Bahcall, J. N. Bahcall, K. Eguchi, K. Enqvist, K. Enqvist, K. Olive, L. Wolfenstein, M. Ahn, M. C. Gonzalez-Garcia, M. Fukugita, M. Maltoni, N. Terasawa, P. Bari Di, P. Creminelli, P. Crotty, P. Holanda, P. Langacker, Q. Ahmad, R. Barbieri, R. Barbieri, R. Cowsik, R. Cyburt, R. E. Lopez, R. Foot, R. Trotta, S. Allen, S. Basu, S. Bilenky, S. Bilenky, S. Esposito, S. Mikheyev, S. S. Gershtein, V. Barger, V. Barger, V. Shvartsman, Y. Fukuda, Yu. I. Izotov, Ø. Elgarøy   +65 more
core   +2 more sources

Precise Measurement of Magnesium Isotopes in Fe‐Mg Minerals Using a Multi‐collector SHRIMP Ion Microprobe

Geostandards and Geoanalytical Research, Volume 48, Issue 2, Page 331-343, June 2024.
Key Points Corrected for the Earth's magnetic field, the SHRIMP's IMF depends on the mineral species, not the chemical composition. The IMF arises from the force constant difference between "hard" and "soft" bonds, which is characteristic of each mineral. This permitted the calculation of IMF‐correction factors for most common Mg‐bearing minerals.
Fernando Bea, Pilar Montero, Delia Ortega, José F. Molina, Aitor Cambeses, Leticia Barcos, Shui‐Jiong Wang, Shan Ke   +7 more
wiley   +1 more source

Production of Lithium and Heavy Elements in AGB Stars Experiencing PIEs

Galaxies
Asymptotic giant branch (AGB) stars can experience proton ingestion events (PIEs), leading to a rich nucleosynthesis. During a PIE, the intermediate neutron capture process (i-process) develops, leading to the production of trans-iron elements.
Arthur Choplin, Lionel Siess, Stephane Goriely, Sebastien Martinet   +3 more
doaj   +1 more source

The bulk mineralogy, elemental composition, and water content of the Winchcombe CM chondrite fall

Meteoritics &Planetary Science, Volume 59, Issue 5, Page 1006-1028, May 2024.
Abstract On the microscale, the Winchcombe CM carbonaceous chondrite contains a number of lithological units with a variety of degrees of aqueous alteration. However, an understanding of the average hydration state is useful when comparing to other meteorites and remote observations of airless bodies.
H. C. Bates, A. J. King, K. S. Shirley, E. Bonsall, C. Schröder, F. Wombacher, T. Fockenberg, R. J. Curtis, N. E. Bowles   +8 more
wiley   +1 more source

Machine learning opportunities for nucleosynthesis studies

Frontiers in Astronomy and Space Sciences
Nuclear astrophysics is an interdisciplinary field focused on exploring the impact of nuclear physics on the evolution and explosions of stars and the cosmic creation of the elements.
Michael S. Smith, Dan Lu
doaj   +1 more source

Heavy Elements and Electromagnetic Transients from Neutron Star Mergers

Annalen der Physik, Volume 536, Issue 2, February 2024.
Astro‐(physics) has made major leaps forward through the combined information provided by both gravitational waves and electromagnetic emission from the first detected neutron star merger event. This review provides an up‐to‐date overview of today's understanding of neutron star mergers and their electromagnetic emission and it discusses possible ...
Stephan Rosswog, Oleg Korobkin
wiley   +1 more source

Modeling of Cosmogenic Cr Isotopes Produced in Lunar Rocks Compared With Existing Calculations and Measurements

Journal of Geophysical Research: Planets, Volume 129, Issue 2, February 2024.
Abstract The nucleosynthetic Cr isotope anomalies provides useful information to trace the source and origin of extraterrestrial samples, but it is usually influenced by high‐energy cosmic rays, and evaluating such effect of cosmic rays in lunar samples is especially important.
Bailiang Liu, Jingnan Guo, Mikhail I. Dobynde, Jia Liu, Yingnan Zhang, Liping Qin   +5 more
wiley   +1 more source

Nucleosynthesis Predictions and High-Precision Deuterium Measurements

Universe, 2017
Two new high-precision measurements of the deuterium abundance from absorbers along the line of sight to the quasar PKS1937–1009 were presented. The absorbers have lower neutral hydrogen column densities (N(HI) ≈ 18 cm − 2 ) than for previous ...
Signe Riemer-Sørensen, Espen Sem Jenssen   +1 more
doaj   +1 more source