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Measurements of Age by the Carbon-14 Technique

Measurements of Age by the Carbon-14 Technique NATURE December 18, 1954 voL. 174 Tallie 1. SOURCES OF E-LAYER IONIZING RADIATIOX, also, soon after totality, a new layer formed between February 25, 1952 the FI- and F2-layers; but, although its density increased very rapidly, it quickly rose in height and Radial extent Position angle Intensity (Ro) (from N, pole) (per cent,) merged into the normal F2-layer, the density of Source which had remained quite constant during the Khartoum Kh 1 240°-320° 0·98-1 ·0 25 eclipse. The sequence of events in the F2-layer both Kh2 68° 0 ·64-1 ·0 8 at Khartoum and Ibadan, and also during the normal Kh 3 320° l·O 3 Disk - - 64 sunrise period, is suggestive of the generation of free electrons at a fairly low level and the vertical trans­ Ibadan lb 1 240°-295° (a) 25 port of this ionization to higher levels where the lb 2 59° O·S 8 much lower recombination coefficient results in the Disk 67 - - very slow rate of decay normally associated with the (a) Assumed to be confined to the limb as i erred from Khartoum data. F2-layer. Es-Layer ; Corpuscular Eclipse the ionospheric and coronal sources, it would be An unusual and very http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Springer Journals

Measurements of Age by the Carbon-14 Technique

Nature , Volume 174 (4442) – Dec 18, 1954

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References (4)

Publisher
Springer Journals
Copyright
Copyright © 1954 by Nature Publishing Group
Subject
Science, Humanities and Social Sciences, multidisciplinary; Science, Humanities and Social Sciences, multidisciplinary; Science, multidisciplinary
ISSN
0028-0836
eISSN
1476-4687
DOI
10.1038/1741138a0
Publisher site
See Article on Publisher Site

Abstract

NATURE December 18, 1954 voL. 174 Tallie 1. SOURCES OF E-LAYER IONIZING RADIATIOX, also, soon after totality, a new layer formed between February 25, 1952 the FI- and F2-layers; but, although its density increased very rapidly, it quickly rose in height and Radial extent Position angle Intensity (Ro) (from N, pole) (per cent,) merged into the normal F2-layer, the density of Source which had remained quite constant during the Khartoum Kh 1 240°-320° 0·98-1 ·0 25 eclipse. The sequence of events in the F2-layer both Kh2 68° 0 ·64-1 ·0 8 at Khartoum and Ibadan, and also during the normal Kh 3 320° l·O 3 Disk - - 64 sunrise period, is suggestive of the generation of free electrons at a fairly low level and the vertical trans­ Ibadan lb 1 240°-295° (a) 25 port of this ionization to higher levels where the lb 2 59° O·S 8 much lower recombination coefficient results in the Disk 67 - - very slow rate of decay normally associated with the (a) Assumed to be confined to the limb as i erred from Khartoum data. F2-layer. Es-Layer ; Corpuscular Eclipse the ionospheric and coronal sources, it would be An unusual and very

Journal

NatureSpringer Journals

Published: Dec 18, 1954

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