Now showing items 1-10 of 48
Nuclear level density and the determination of thermonuclear rates for astrophysics
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 ...
The r-process in the high entropy bubble
The endpoint of the rp-process
Uncertainties in direct neutron capture calculations due to nuclear structure models
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. For spherical nuclei close to the dripline the statistical model (Hauser-Feshbach) approach is not applicable ...
Applicability of the Hauser-Feshbach approach for the determination of astrophysical reaction rates
Nuclear Astrophysics requires the knowledge of reaction rates over a wide range of nuclei and temperatures. In recent calculations the nuclear level density – as an important ingredient to the statistical model (Hauser-Feshbach) ...
An approximation for the rp-process
Hot (explosive) hydrogen burning, or the rapid proton capture process (rp-process), occurs in a number of astrophysical environments. Novae and X-ray bursts are the most prominent ones, but accretion disks around black ...
Restoration and balance of complex folded and faulted rock volumes: Flexural flattening, jigsaw fitting and decompaction in three dimensions
Techniques of two-dimensional bed length and cross-sectional area restoration are extended into true, three-dimensional (3-D) restorations using the preservation of areas of individual surfaces plus conservation of volume ...
A Gamma-Ray Flare in NRAO 190
We describe observations of the quasi-stellar object (QSO) NRAO 190 during a gamma-ray flare from 1994 August 9 to 1994 August 29. This QSO was serendipitously detected by the EGRET instrument on the Compton Gamma Ray ...
Multiwavelength observations of the February 1996 high-energy flare in the blazar 3C 279
(American Institute of Physics, 1997-05-01)
We report CGRO, RXTE, ASCA, ROSAT, IUE, HST and ground-based observations of a large flare in 3C 279 in February 1996. X-rays and γ-rays peaked simultaneously (within one day). We show simultaneous spectral energy distributions ...
Detection of a second optical component in the H I cloud of the young dwarf galaxy SBS 0335-052 : New observations with the 6-m telescope
The Blue Compact Dwarf (BCD) galaxy SBS 0335–052 is one of the most metal–deficient galaxies known and one of the best candidates for a young dwarf galaxy in the process of formation. A VLA HI map reveals an unusual ...