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.

RT Journal
T1 Transactinium elements in the evolving universe
A1 Chechev,V.P.
A1 Kramarovskii,Ya.M.
PB Physics-Uspekhi
PY 1975
FD 10 Aug, 1975
JF Physics-Uspekhi
JO Phys. Usp.
VO 18
IS 8
SP 612-623
DO 10.1070/PU1975v018n08ABEH004916
LK https://ufn.ru/en/articles/1975/8/d/