Browsing by Title
Now showing items 15375-15394 of 24083
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Nuclear level density and the determination of thermonuclear rates for astrophysics
(1997-09)The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. In recent calculations the nuclear level density-as an important ingredient to the statistical model ... -
Nuclear medicine
(Churchill Livingstone, 2009)Nuclear Medicine is concerned with providing diagnostic information about patients following the administration of a radioactive product. The patient is imaged using a Gamma Camera. Images are produced of the distribution ... -
Nuclear partition functions at temperatures exceeding 10(10) K
(2003-08)Nuclear partition functions were calculated for a grid of temperatures from 1.2 x 10(10) to 2.75 x 10(11) K (1 MeV less than or equal to kT less than or equal to 24 MeV) within a Fermi-gas approach, including all nuclides ... -
Nuclear physics : A key ingredient in astrophysical modeling
(2005-04-18)Nuclear physics is a basic ingredient in a large number of energetic astrophysical environments which are characterized by sufficient temperatures and densities to permit scattering events among particles, leading to nuclear ... -
Nuclear physics for the Re/Os clock
(2008-01)Dating the age of the universe by the beta-decay of (187)Re (t(1/2) = 41.2 Gyr) requires the accurate assessment of the s-process reaction flow. The daughter nucleus (187)Os as well as its immediate s-only neighbor (186)Os ... -
Nuclear physics issues of the r-process
(World Scientific Publishing, 2003)The present paper aims at understanding r-process nucleosynthesis by addressing the nuclear physics involved, the necessary environment conditions in the (stellar) production sites, and the observational constraints. We ... -
The Nuclear Reaction Network WinNet
(2023-10-11)We present the state-of-the-art single-zone nuclear reaction network WinNet, which is capable of calculating the nucleosynthetic yields of a large variety of astrophysical environments and conditions. This ranges from the ... -
Nuclear reactions for nucleosynthesis beyond Fe
(American Institute of Physics (AIP), 2015-10-15)Many more nuclear transitions have to be known in the determination of stellar reactivities for trans-iron nucleosynthesis than for reactions of light nuclei. This requires different theoretical and experimental approaches. ... -
Nuclear star formation in the hot-spot galaxy HGC 2903
(2000-06)Circumnuclear regions (CNR) of enhanced star formation (SF) in disk galaxies are usually associated with the presence of stellar bars. Since bars are believed to be one of the most effective mechanisms for transporting ... -
The nuclear torus in the active galaxy NGC 1068
(1996)We present near-infrared polarized images of the active galaxy NGC 1068. At these wavelengths, the counter-cone is observed in scattered light. At H (1.64 μm) we detect an absorption band across the counter-cone, which we ... -
The Nucleic Acids Protocols Handbook
(Humana Press, 2000)The Nucleic Acid Protocols Handbook is today's most comprehensive up-to-date treasury of all the key molecular biology methods-ranging from DNA extraction to gene localization in situ-needed to function effectively in the ... -
Nucleosynthesis and early chemical evolution in galaxies
(2003)Nucleosynthesis and galactic chemical evolution are inter-linked topics that merge various fields in astronomy and physics. Speakers at the RAS discussion meeting of January 2003 combined theory and observation in understanding ... -
Nucleosynthesis and stellar evolution
(2002)Two of the basic building blocks of galaxies are stars and the interstellar medium. The evolution of the abundance composition in the latter and especially the enrichment of heavy elements as a function of space and time ... -
Nucleosynthesis at the proton drip line - a challenge for nuclear physics
(American Institute of Physics, 1998)The rp-process in X-ray bursts is investigated using a complete and updated nuclear reaction network from H to Sr, that is coupled to a one dimensional, one zone X-ray burst model. In particular we consider 2p-capture ... -
Nucleosynthesis in core-collapse supernova explosions triggered by a quark-hadron phase transition
(2012-10-10)We explore heavy-element nucleosynthesis in the explosion of massive stars that are triggered by a quark-hadron phase transition during the early post-bounce phase of core-collapse supernovae. The present study is based ... -
Nucleosynthesis in massive stars revisited
(2001-05-21)We have performed the first calculations to follow the evolution of all stable nuclei and their radioactive progenitors in a finely-zoned stellar model computed from the onset of central hydrogen burning through explosion ...