electron

During the period from 1 July 1960 through 31 January 1961, additional research affiliations were effected with the U. S. Army Medical Research and Development Command to conduct research in procedures for quantitative electron microscopy, and for the study of biophysical and biological studies of the structure and function of ocular tissue.

Other scientific agencies, both Federal and civilian, supported studies in quantitative electron microscopical approach to microchemistry and microcytochemistry ; ;

In addition to the basic programs in wavelength standards, spectroscopy, solid state physics, interactions of the free electron and atomic constants which are necessary to provide the foundation for technological progress, the Bureau has strengthened its activities in laboratory astrophysics.

The use of high voltages and low currents by proper design to reduce electron heat transfer to the anode for a given power output.

Af is paramagnetic, and electron paramagnetic dipole as well as nuclear dipole effects lead to line broadening.

Hence, the electron paramagnetic effects ( slope ) can be separated from the nuclear effects ( intercept ).

the magnetic moment of an unpaired electron associated nearby may have a tremendous influence on the magnetic resonance properties of nuclei.

Indeed it is possible to separate electron paramagnetic from nuclear effects.

The information provided by the electron paramagnetic effects is then discussed, and finally the nuclear effects are interpreted in terms of various motional-modified models of the Af bond in Af.

We found no obvious effects due to preferred orientation of the crystallites in this sample nor would we expect to on the basis of the shape found from electron microscopic examination.

The approximate equation is Af, where N is the number of Af with electron line-density greater than or equal to Af, and Q is proportional to the mass of the meteorite.

Crystallographic data resulting mainly from X-ray and electron diffraction measurements are presented.

For irradiation of food, the results obtained depend upon the dose rather than the specific type of radiation, and X-ray, gamma, and high-energy electron radiation are suitable.

for example, gamma rays give deeper penetration but cannot be focused or collimated, whereas unidirectional electron beams may be split and directed to both the top and bottom of the food package to be irradiated.

Radiopasteurization by either the electron accelerator or cesium-137 source is in the range of freezing costs.

Irradiation using the nuclide source is more expensive than use of an electron accelerator.

Transmission secondary electron multiplication image intensifiers ( TSEM tubes ), ( E )

These tubes may differ both in the choice of the electron optical system and in the design of the coupling members.

The electron optical system may be either a magnetic or electrostatic one.

It should be noted, however, that the paraxial resolution is quite similar for both electron optical systems.

The electron optical system ( see fig. 14-1 ) is based in principle on the focusing action of concentric spherical cathode and anode surfaces.

The resolution limitations for a single stage are given by the inherent resolution of the electron optical system as well as the resolution capabilities of the cathodoluminescent viewing screen.

The possibility of a space charge blowup of the screen crossover of the elementary electron bundles has been pointed out.

Thus, in general, elementary light optical effects, light scatter, and electron scatter determine the obtainable resolution limit.

It should be noted that photoluminescence, due to `` Bremsstrahlung '' generated within the viewing screen by electron impact, appears to be important only if anode voltages in excess of 30 KV are utilized.