Results 91 to 100 of about 2,462,374 (243)

Tracer Applications of Noble Gas Radionuclides in the Geosciences

open access: yes, 2013
The noble gas radionuclides, including 81Kr (half-life = 229,000 yr), 85Kr (11 yr), and 39Ar (269 yr), possess nearly ideal chemical and physical properties for studies of earth and environmental processes.
Fischer, T. P.   +10 more
core   +3 more sources

Workshop on Cosmogenic Nuclides [PDF]

open access: yes
s of papers presented at the Workshop on Cosmogenic Nuclides are compiled. The major topic areas covered include: new techniques for measuring nuclides such as tandem accelerator and resonance mass spectrometry; solar modulation of cosmic rays; pre ...
Englert, P., Reedy, R. C.
core   +1 more source

Preliminary testing of a prototype portable X-ray fluorescence spectrometer [PDF]

open access: yes
A portable X-ray fluorescence spectrometer for use as an analyzer in mineral resource investigative work was built and tested. The prototype battery powered spectrometer, measuring 11 by 12 by 5 inches and weighing only about 15 pounds, was designed ...
Anderson, N. B.   +2 more
core   +3 more sources

Dielectrics for long term space exposure and spacecraft charging: A briefing [PDF]

open access: yes
Charging of dielectrics is a bulk, not a surface property. Radiation driven charge stops within the bulk and is not quickly conducted to the surface. Very large electric fields develop in the bulk due to this stopped charge. At space radiation levels, it
Frederickson, A. R.
core   +1 more source

The glacial cycles and cosmic rays

open access: yes, 2004
The cause of the glacial cycles remains a mystery. The origin is widely accepted to be astronomical since paleoclimatic archives contain strong spectral components that match the frequencies of Earth's orbital modulation.
Kirkby, J., Mangini, A., Muller, R. A.
core  

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