A novel fluorescent x-ray source has been used to investigate the use of photon scattering methods for the detection and location of defects in small samples of low atomic number. The instrument incorporates a secondary tantalum target within the tube head and its energy spectrum shows only the Ta fluorescent lines superimposed on a smooth background. (Author).
The earth's ozone layer occurs in the stratosphere, primarily between 10 and 30 miles altitude. The amount of ozone, O3, present is the result of a balance between production and destruction processes. Experiments have shown that natural processes such as auroras create molecules that destroy O3. One family of such molecules is called 'odd nitrogen' of which nitric oxide (NO) is an example. Because the HAARP (HF Active Auroral Research ...
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