14,979 research outputs found
Elastic and inelastic breakup of deuterons with energy below 100 MeV
We present calculations of deuteron elastic and inelastic breakup cross
sections and angular distributions at deuteron energies below 100 MeV obtained
using the post-form DWBA approximation. The elastic breakup cross section was
extensively studied in the past. Very few calculations of inelastic breakup
have been performed, however. We also analyze the angular momentum - energy
distributions of the cross section for formation of the compound nucleus after
inelastic breakup.Comment: 7 page
^1S_0 pairing correlations in relativistic nuclear matter and the two-nucleon virtual state
We use the Gorkov formulation of the Dirac-Hartree-Fock-Bogoliubov
approximation to nuclear pairing to study the ^1S_0 nucleon-nucleon
correlations in nuclear matter. We find the short-range correlations of the
^1S_0 pairing fields to be almost identical to those of the two-nucleon virtual
state. We obtain mutually consistent results for the pairing fields, using
several different sets of effective interaction parameters, when we demand that
each of these sets places the virtual-state pole at its physical location.Comment: 11 pages, 9 PostScript figures, RevTex, submitted to Phys. Rev.
Applications of remote sensing in resource management in Nebraska
There are no author-identified significant results in this report
Effective Widths and Effective Number of Phonons of Multiphonon Giant Resonances
We discuss the origin of the difference between the harmonic value of the
width of the multiphonon giant resonances and the smaller observed value.
Analytical expressions are derived for both the effective width and the average
cross-section. The contribution of the Brink-Axel mechanism in resolving the
discrepancy is pointed out.Comment: 9 pages, 4 figure
Statistical features of the thermal neutron capture cross sections
We discuss the existence of huge thermal neutron capture cross sections in
several nuclei. The values of the cross sections are several orders of
magnitude bigger than expected at these very low energies. We lend support to
the idea that this phenomenon is random in nature and is similar to what we
have learned from the study of parity violation in the actinide region. The
idea of statistical doorways is advanced as a unified concept in the
delineation of large numbers in the nuclear world. The average number of maxima
per unit mass, in the capture cross section is calculated and related
to the underlying cross section correlation function and found to be , where is a characteristic mass
correlation width which designates the degree of remnant coherence in the
system. We trace this coherence to nucleosynthesis which produced the nuclei
whose neutron capture cross sections are considered here.Comment: 7 pages, 6 figures. To appear in Acta Physica Polonica B as a
Contribution to the proceedings of:Jagiellonian Symposium of Fundamental and
Applied Subatomic Physics, June 7- 12, 2015 Krakow, Polan
The Low-Cost, Moderate-Cost, and Liberal Food Plans, 2007
The Low-Cost, Moderate-Cost, and Liberal Food Plans, three fundamental parts of the U.S. food guidance system, have been revised by USDA’s Center for Nutrition Policy and Promotion, with assistance from USDA’s Food and Nutrition Service, Economic Research Service, and Agricultural Research Service. The plans provide representative healthful market baskets at three different cost levels. This revision maintains the same inflation-adjusted costs as those of the previous three food plans, last revised in 2003. In line with previous food plans, an assumption used to develop these plans was that all purchased food is consumed at home. The newly revised (2007) Low-Cost, Moderate-Cost, and Liberal Food Plans differ from, and improve upon, the previous versions in a number of ways: • The Plans are based on the most current dietary standards: the 2005 Dietary Guidelines for Americans as well as the 2005 MyPyramid Food Guidance System. • The Plans use the latest data on food consumption, nutrient content, and food prices: the 2001-2002 National Health and Nutrition Examination Survey and the 2001- 2002 Food Price Database. • The Plans offer a more realistic reflection of the time available for home food preparation; hence, each plan incorporates more prepared foods within the recipes and requires fewer preparations from scratch.USDA Food Plans, Low-Cost Food Plan, Moderate-Cost Food Plan, Liberal Food Plan, Diet Quality, Cost of Food, Agricultural and Food Policy, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, Health Economics and Policy,
- …