Results 241 to 250 of about 124,044 (295)
Some of the next articles are maybe not open access.
Physics Today, 1952
It may seem astonishing that after radioactive substances have been known for over half a century there should still remain important unsolved problems in the domain of natural radioactivity. This field was the first of the great subdivisions of nuclear physics to be explored, and yet much remains to be done here.
openaire +1 more source
It may seem astonishing that after radioactive substances have been known for over half a century there should still remain important unsolved problems in the domain of natural radioactivity. This field was the first of the great subdivisions of nuclear physics to be explored, and yet much remains to be done here.
openaire +1 more source
On the natural radioactivity in the air
Journal of Geophysical Research, 1952The concentrations of the various radioactive decay products of radium in the air have been determined by observing the beta activity (1) of pieces of filter paper through which air has been passed, and (2) of chemically separated isotopes obtained from such filter papers. The relative amounts of long-lived and short-lived products found indicate that,
Irving H. Blifford +2 more
openaire +1 more source
Natural radioactivity and radioactive waste disposal
Journal of Volcanology and Geothermal Research, 1992Abstract The disposal of long-lived radioactive wastes by deep burial in suitable rock formations is an emotive issue. Although disposal is technically not exceptionally demanding, the demonstration of long-term safety using predictive hydrogeological and geochemical models has proved much more difficult.
openaire +1 more source
Editorial - Natural Radioactivity
Radiation Protection Dosimetry, 1988Abstract
A.O. de Bettencourt +4 more
openaire +1 more source
Natural Radioactivity of Rhenium
Physical Review, 1962The natural radioactivity of Re/sup 187/ was investigated by the method of internal gas-tube low-level Geiger counting. A half-life of (l.2 plus or minus 0.4) x l0/sup 11/ yr was found for the direct beta decay. Gas-tube proportional measurements suggest a value of about 3 kev for the maximum beta energy.
Clarence J. Wolf, W. H. Johnston
openaire +1 more source
Natural radioactivity in the atmosphere
Journal of Geophysical Research, 1961The activitles of cosmic-ray-produced radioisotopes P/sup 32, P/sup 33/, and Be/sup 7/ and of Pb/sup 210/ which arises from t he decay of radon, were measured in samples of dust filtered from stratospheric and tropospheric air. The short-lived activities appear to be in secular equilibrium with the respective local productions in various regions of the
M. Rama, M. Honda
openaire +1 more source
The natural radioactivity of lanthanum
Philosophical Magazine, 1957Abstract The decay of 138La, the middle member of a naturally occurring isobaric triplet, is studied by means of heavily shielded scintillation and proportional tube spectrometers. The existence of only two of three γ-rays reported by earlier investigators is confirmed, their energies bcing (0.81±0.01) and (1.44±0.02)MeV.
R. N. Glover, D. E. Watt
openaire +1 more source
Natural Radioactivity in Bananas
AIP Conference Proceedings, 2008The content of 40K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, Sao Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself ...
V. A. B. Zagatto +5 more
openaire +1 more source
Natural Radioactivity of Rhenium
Physical Review, 1954An attempt to confirm the reported $K$ capture activity of ${\mathrm{Os}}^{187}$, using Os${\mathrm{O}}_{4}$ mixed with argon as the counter gas, failed to reveal any activity corresponding to a half-life of less than ${5\ifmmode\times\else\texttimes\fi{}10}^{11}$ years.
A. D. Suttle, W. F. Libby
openaire +1 more source
Radioactivity, artificial and natural
Electrical Engineering, 1938In a very few years after its discovery in 1898, radioactivity became and has ever since remained the most celebrated subdivision of modern physics. In addition to substances naturally radioactive, such as radium, others may be made so artificially; in fact, of all the known elements, hydrogen alone remains the only one of which a radioactive type has ...
openaire +1 more source