Results 41 to 50 of about 130,022 (84)

Observation of a low-lying neutron-unbound state in 19C

, 2013
Proton removal reactions from a secondary 22N beam were utilized to populate unbound states in neutron-rich carbon isotopes. Neutrons were measured with the Modular Neutron Array (MoNA) in coincidence with carbon fragments.
Badger, N. S., Baumann, T., Bazin, D., Bennett, M., Brown, J., Christian, G., DeYoung, P. A., Finck, J. E., Gardner, M., Hook, E. A., Luther, B., Meyer, D. A., Mosby, M., Mosby, S., Rogers, W. F., Smith, J. K., Spyrou, A., Strongman, M. J., Thoennessen, M.   +18 more
core   +1 more source

Nucleosynthesis in Massive Stars With Improved Nuclear and Stellar Physics [PDF]

, 2001
We present the first calculations to follow the evolution of all stable nuclei and their radioactive progenitors in stellar models computed from the onset of central hydrogen burning through explosion as Type II supernovae. Calculations are performed for
A. Heger, Arnould M., Costa V., Heger A., Hillebrandt W., Janka H.-T., Landre V., Nieuwenhuijzen H., Prantzos N., R. D. Hoffman, Rayet M., Rayet M., S. E. Woosley, Schaller G., Somorjai E., T. Rauscher   +15 more
core   +2 more sources

The effect of 12C + 12C rate uncertainties on the evolution and nucleosynthesis of massive stars

, 2012
[Shortened] The 12C + 12C fusion reaction has been the subject of considerable experimental efforts to constrain uncertainties at temperatures relevant for stellar nucleosynthesis.
A. Hungerford, Aguilera, Aikawa, Angulo, Arcoragi, Arnett, Arnett, Arnett, Arnett, Barrón-Palos, Bennett, Betts, Busso, C. Fryer, Caughlan, Chieffi, Clayton, Cooper, Couch, Dayras, de Jager, Descouvemont, Diaz-Torres, Diaz-Torres, Dillmann, Eggenberger, El Eid, El Eid, F. Herwig, F. X. Timmes, Ferguson, Fryer, Fuller, Fynbo, G. Rockefeller, Gasques, Grevesse, Gropp, Heger, Hirschi, Hirschi, Hix, Iapichino, Iliadis, Imanishi, Imbriani, Imbriani, Itoh, Itoh, Jaeger, Jiang, Jiang, K. Nomoto, Kondo, Kunz, Käppeler, Lamb, Limongi, M. E. Bennett, M. Pignatari, M. Wiescher, Maeder, Mauron, Meynet, Michaud, Montes, Mukhamedzhanov, Nugis, Oda, Perez-Torres, Peters, Pignatari, Prantzos, R. Hirschi, Raiteri, Raiteri, Rauscher, Rauscher, Rauscher, Rogers, S. Diehl, Spillane, Strieder, Strieder, Terrasi, The, The, Tinsley, Travaglio, Truran, Truran, Tur, Vink, Woosley, Woosley, Woosley, Xu, Yakovlev, Young   +98 more
core   +1 more source

Halite and stable chlorine isotopes in the Zag H3-6 breccia [PDF]

, 2004
Zag is an H3-6 chondrite regolith breccia within which we have studied 14 halite grains ?3mm. The purity of the associated NaCl-H2O brine is implied by freezing characteristics of fluid inclusions in the halite and EPMA analyses together with a lack of ...
Banks, D.A., Bridges, J.C., Grady, M.M., Smith, M.   +3 more
core   +1 more source

Enantioselective Carbon Isotope Exchange

Journal of the American Chemical Society
The synthesis of isotopically labeled organic molecules is vital for drug and agrochemical discovery and development. Carbon isotope exchange is emerging as a leading method to generate carbon-labeled targets, which are sought due to their enhanced stability in biological systems.
Michael G. J. Doyle, Odey Bsharat, Anna Sib, Volker Derdau, Rylan J. Lundgren   +4 more
openaire   +2 more sources

A light carbon isotope composition for the Sun

Nature Communications, 2018
AbstractMeasurements by the Genesis mission have shown that solar wind oxygen is depleted in the rare isotopes, 17O and 18O, by approximately 80 and 100‰, respectively, relative to Earth’s oceans, with inferred photospheric values of about −60‰ for both isotopes.
Ehsan Gharib-Nezhad, Thomas R. Ayres, James R. Lyons   +2 more
openaire   +4 more sources

Nuclear reactions in shock wave front during supernova events [PDF]

The new unique isotopic anomalous coponent of Xe(XeX) was found in the carbonaceous chondrites. It is enriched in light shielded isotopes (124Xe and 126Xe) and in heavy nonshielded isotopes (134Xe and 136Xe.
Lavrukhina, A. K.
core   +1 more source

Fully microscopic shell-model calculations with realistic effective hamiltonians

, 2011
The advent of nucleon-nucleon potentials derived from chiral perturbation theory, as well as the so-called V-low-k approach to the renormalization of the strong short-range repulsion contained in the potentials, have brought renewed interest in realistic
A Covello, A Gargano, Bogner S, Covello A, L Coraggio, N Itaco, T T S Kuo   +6 more
core   +1 more source

Diamonds and carbon isotopes

Eos, Transactions American Geophysical Union, 1983
Diamond crystals may contain useful geochemical evidence of the deep portions of the upper mantle in their carbon isotopes. Two recent studies of types I and II diamonds showed that variations in δ13C may be related to carbon reservoir sources in the mantle (Nature, 303, 791–792, and 793–795, 1983).
openaire   +2 more sources

Biogeochemistry of stable carbon isotopes [PDF]

Biochemistry and geochemistry of stable carbon ...
Degens, E. T.
core   +1 more source