Longitudinal and Transverse Parton Momentum Distributions for Hadrons within Relativistic Constituent Quark Models

Longitudinal and transverse parton distributions for pion and nucleon are calculated from hadron vertexes obtained by a study of form factors within relativistic quark models. The relevance of the one-gluon-exchange dominance at short range for the behavior of the form factors at large momentum transfer and of the parton distributions at the end points is stressed.Comment: 5 pages, 4 figs. Proceedings of Hadron 09, to appear in AIP Conference Proceeding

Development, fabrication and testing of a magnetically connected plastic vacuum probe surface sampler

The sampler utilizes permanent magnets and soft metal pole pieces to connect the cone/filter assembly to the sampling head and vacuum supply. The cone/filter assembly is packaged in a plastic container and presterilized so that the need for any human contact during the sampling procedure is completely eliminated. Microbiological tests have demonstrated that the sampling efficiency is not affected by the magnetic coupling apparatus and that the probe appears to function as efficiently as the conventional plastic and Sandia vacuum probes

High-sensitivity infrared receiver development Quarterly report, 1 Jul. - 30 Sep. 1966

Infrared heterodyne mixer and preamplifier development progra

Wind tunnel test IA300 analysis and results, volume 1

The analysis and interpretation of wind tunnel pressure data from the Space Shuttle wind tunnel test IA300 are presented. The primary objective of the test was to determine the effects of the Space Shuttle Main Engine (SSME) and the Solid Rocket Booster (SRB) plumes on the integrated vehicle forebody pressure distributions, the elevon hinge moments, and wing loads. The results of this test will be combined with flight test results to form a new data base to be employed in the IVBC-3 airloads analysis. A secondary objective was to obtain solid plume data for correlation with the results of gaseous plume tests. Data from the power level portion was used in conjunction with flight base pressures to evaluate nominal power levels to be used during the investigation of changes in model attitude, eleveon deflection, and nozzle gimbal angle. The plume induced aerodynamic loads were developed for the Space Shuttle bases and forebody areas. A computer code was developed to integrate the pressure data. Using simplified geometrical models of the Space Shuttle elements and components, the pressure data were integrated to develop plume induced force and moments coefficients that can be combined with a power-off data base to develop a power-on data base

Effects of external irradiation of pregnant female rats on viability, growth and fertility of the offspring

Ionization within individual cells is produced when tissues are exposed to high levels of radiation; this may lead to cell damage or death of the cells. Both x-rays and gamma rays are electromagnetic radiations which are thought of as being physically identical, the difference in name indicating only a difference in origin. The interaction of electromagnetic radiation with matter changes in character as the energy increases. In the low energy region, the interaction is chiefly by the photoelectron process in which each individual photon loses its entire energy in a single collision with an electron. In the intermediate energy region, both the photoelectric effect and Compton scattering are significant, the latter involving multiple, degrading collision of a single photon with several electrons. The Compton effect becomes more significant, and the photoelectric effect less significant, as the energy increases. Above 1.02 mev* a third process is observed; this is the pair production process in which a single photon produces a positron and a negatron at the same time. The electrons produced by these three processes are responsible for ionization within the individual cells. Ordinarily, x-rays are in the low energy region, and interact chiefly by the photoelectric process, whereas gamma rays from cobalt-60 are in the high energy region, where a considerable amount of the initial energy loss is by the Compton process. This study was initiated to determine the effects of gamma ray exposure of pregnant female rats on pre- and postnatal viability, growth and fertility of the irradiated offspring. It was hoped that the data obtained in this study would aid in designing further comparable type studies currently in progress with cattle and swine