An exponential model of continuous galactic synthesis is used to analyze new data on the abundance in meteorites, the Earth, and the moon of several transactinium nuclei, particularly plutonium-244. It is shown that nucleosynthesis in our galaxy occurred over a period of six billion years up to the formation of the solar system. The possibility of a change in nuclear stability in the past as the result of change in the universal constants is also discussed. It is shown that this possibility is greatly limited but that a direct check of the constancy of the constants could be obtained by comparison of the radii of pleochroic rings in old micas with contemporary $\alpha$-particle ranges.

PT Journal Article
TI Transactinium elements in the evolving universe
AU Chechev V P
FAU Chechev VP
AU Kramarovskii Ya M
FAU Kramarovskii YM
DP 10 Aug, 1975
TA Phys. Usp.
VI 18
IP 8
PG 612-623
RX 10.1070/PU1975v018n08ABEH004916
URL https://ufn.ru/en/articles/1975/8/d/
SO Phys. Usp. 1975 Aug 10;18(8):612-623