Na-22, Ne-E, extinct radioactive anomalies and unsupported Ar-40

Details Na-22, Ne-E, extinct radioactive anomalies and unsupported Ar-40 Na-22, Ne-E, extinct radioactive anomalies and unsupported Ar-40

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975natur.257...36c&link_type=abstract

Nature, vol. 257, Sept. 4, 1975, p. 36, 37. NASA-NSF-supported research.

Physics

85

Argon Isotopes, Neon Isotopes, Nuclear Explosion Effect, Nuclear Fusion, Radioactive Isotopes, Sodium 22, Abnormalities, Cosmology, Half Life, Metals, Radiative Lifetime, Radioactivity

Scientific paper

The possibility that the origin of extinct radioactivities depended on their living long enough for grains to form in the expanding nucleosynthetic envelope, rather than on their living long enough for meteorites to form, is examined. As an example, the interpretation of Na-22 as a detectable extinct radioactivity, with a half life of only 2.6 years, is explored and related to Ne-22 occurrence. Similar arguments involving He-4, Ar-40, K-40, K-41, and calcium, titanium, chromium, manganese, iron, nickel, and cobalt isotopes are briefly presented.

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