Results 31 to 40 of about 307 (107)

Potential Chronological Disturbance of the D’Orbigny Angrite Inferred from Discordant 26Al Ages

The Astrophysical Journal Letters
Angrites originate from the early-formed differentiated angrite parent body. The pristine volcanic angrite D’Orbigny is devoid of brecciation, shock effects, or any evidence of secondary processes and is thus key for studying the early stages of ...
Cécile Deligny, Maxime Piralla, Johan Villeneuve, Evelyn Füri, Yves Marrocchi   +4 more
doaj   +1 more source

Neutron capture cross section measurements for nuclear astrophysics at CERN n_TOF

, 2005
A series of neutron capture cross section measurements of interest to nuclear astrophysics have been recently performed at n-TOF, the neutron spallation source operating at CERN.
Rullhusen, P., Lukic, S., Pignatari, M., Soares, J. C., Colonna, N., Quesada, J. M., Milazzo, P. M., Terlizzi, R., Abbondanno, U., Duran, R.B., Ketlerov, V., Plag, R., Pavlik, A., Ventura, A., Benlliure, J., Goverdovski, A., Lorusso, G., Isaev, S., Kerveno, M., Vannini, G., Marrone, S., Dahlfors, M., Lamboudis, C., Perrot, L., Perlado, J. M., Gallino, R., Cano-Ott, D., Tagliente, G., Reifarth, R., Salgado, J., Villamarin, D., Couture, A., Paradela, C., Gunsing, F., Tain, J. L., Moreau, C., Dolfini, R., Lozano, Maria Victoria, Gramegna, F., Vaz, P., Stephan, C., Policarpo, A., Jericha, E., Plukis, A., Marganiec, J., Ferrant, L., Oberhummer, H., Mosconi, M., Molina-Coballes, A., Berthoumieux, E., Cox, J., Becvar, F., David, S., Frais-Kolbl, H., Aerts, G., Mengoni, A., Cortes, G., Ferrari, A., Vlachoudis, V., Rapp, W., Mastinu, P., Pretel, C., Domingo-Pardo, C., Alvarez-Pol, H., Karadimos, D., Voss, F., Martinez-Val, J., Tassan-Got, L., Griesmayer, E., Goncalves, I. F., Dababneh, S., Pavlopoulos, P., Tavora, L., Embid-Segura, M., Furman, W., Baumann, P., Neves, F., Heil, M., Poch, A., Wendler, H., Haas, B., Capote, R., Konovalov, V., Krticka, M., Andrzejewski, J., Pancin, J., Papaevangelou, T., Vincente, M. C., Ferreira-Marques, R., Rosetti, M., O'Brien, S., Rubbia, C., Koehler, P., Andriamonje, S., Cennini, P., Gonzalez-Romero, E., Haight, R., Kadi, Y., Leeb, H., Calvino, F., Wiescher, M., Chepel, V., Plompen, A., Kappeler, F., Herrera-Martinez, A., Alvarez-Velarde, F., Rauscher, T., Badurek, G., Lindote, A., Cortina, D., Rudolf, G., Wisshak, K., Chiaveri, E., Lopes, I.   +113 more
core   +2 more sources

Neutron cross sections of importance to astrophysics [PDF]

, 1979
Neutron reactions of importance to the various stellar burning cycles are discussed. The role of isomeric states in the branched s-process is considered for particular cases. Neutron cross section needs for the /sup 187/Re-/sup 187/Os, /sup 87/Rb-/sup 87/
Browne, J. C.
core  

NWA 11562: A Unique Ureilite with Extreme Mg-rich Constituents

The Planetary Science Journal
A comprehensive study of an ungrouped achondrite meteorite, North West Africa (NWA) 11562, was conducted, involving petrology, mineralogy, and mass-independent chromium isotopic composition. NWA 11562 comprises 34.9 vol% olivine, 56.1 vol% pyroxenes, 6.7
Mingbao Li, Ke Zhu, Yan Fan, P. M. Ranjith, Chao Wang, Wen Yu, Shijie Li   +6 more
doaj   +1 more source

White-dwarf asteroseismology: an update [PDF]

, 2019
The vast majority of stars that populate the Universe will end their evolution as white-dwarf stars. Applications of white dwarfs include cosmochronology, evolution of planetary systems, and also as laboratories to study non-standard physics and ...
Córsico, Alejandro Hugo, Alejandro H. Córsico   +1 more
core   +1 more source

Highly Heterogeneous Parent Body of the Rare Andesitic Erg Chech 002 Meteorite Revealed by the Revisited Mn–Cr Isotopic Systematics

The Planetary Science Journal
Erg Chech 002 (EC 002), an andesitic meteorite, has been dated to be the oldest magmatic rock in the solar system. However, controversy has arisen due to inconsistent dating results and isotopic compositions in previous studies, which complicates ...
Bing Yang, Runlian Pang, Qing Wang, Anning Zhang, Wei Du, Liping Qin   +5 more
doaj   +1 more source

Beryllium in turnoff stars of NGC 6397: Early Galaxy spallation, cosmochronology and cluster formation [PDF]

Astronomy & Astrophysics, 2004
We present the first detection of beryllium in two turnoff stars of the old, metal-poor globular cluster NGC 6397. The beryllium lines are clearly detected and we determine a mean beryllium abundance of log(Be/H)=-12.35 +/- 0.2. The beryllium abundance is very similar to that of field stars of similar Fe content.
Pasquini, L., Bonifacio, P., Randich, S., Galli, D., Gratton, R. G.   +4 more
openaire   +2 more sources

Nuclear Cosmochronology within Analytic Models of the Chemical Evolution of the Solar Neighborhood [PDF]

, 1988
This paper investigates whether the age of the Galaxy can be deduced from natural radioactivity. I demonstrate that two recent influential claims (by Butcher and by Fowler) that such observations set the age at TG = 10 Gyr depend on special assumptions ...
Clayton, Donald D
core   +1 more source

Robust r-process Nucleosynthesis beyond Lanthanides in the Common Envelop Jet Supernovae

The Astrophysical Journal
The common envelop jet supernovae (CEJSNe) r -process scenario has been proposed as an r -process nucleosynthesis site in the past decade. Jets launched by a neutron star that spirals in inside the core of a red supergiant star in a common envelope ...
Shilun Jin, Noam Soker
doaj   +1 more source

Compilation of the Dakota Aquifer Project isotope data and publications: The Isotope Hydrology Program of the Isotope Sciences Division [PDF]

, 1995
In FY92 the then Nuclear Chemistry Division embarked on a scientific collaboration with the Kansas Geological Survey (KGS) to characterize with isotope techniques groundwater of the Dakota Formation of Kansas.
Hudson, G. B., Davisson, M. L., Niemeyer, S., Smith, D. K., Whittemore, D. O., Macfarlane, P. A.   +5 more
core   +1 more source