nucleochronologyn.
/ˌnjuːklɪəʊkrəˈnɒlədʒi/, U.S. /ˈˌn(j)uklioʊkrəˈnɑlədʒi/ Astronomy.
The study of relative abundances of nuclear species as a means of dating stages in stellar nucleosynthesis. Also: a series of nuclear species arranged in the supposed chronological order of their synthesis within a star, etc.
ΘΚΠ
the world > the universe > cosmology > astronomy > stars > [noun] > nucleochronology
nucleocosmochronology1967
nucleochronology1970
1970 Astrophysical Jrnl. 160 l157 The quantity of importance in nucleochronology calculations is..the ratio of the production ratio to the measured abundance ratio for species i and j.
1974 Sci. Amer. Jan. 77/2 The nucleochronologies yield an age that is quite consistent with the ages calculated from the expansion of the universe and from the stellar populations of the globular clusters.
1982 D. N. Schramm in C. A. Barnes et al. Ess. Nucl. Astrophysics xv. 325 The origin of the neutron-rich heavy elements has had important applications in astrophysics, particularly with regard to the development of nucleochronologies..and recently with regard to isotopic anomalies in meteorites.
1998 Proc. National Acad. Sci. U.S.A. 95 45/1 Fig. 2 also shows the lower bound on the age of the universe of 10 Gyr from both nucleochronology and from globular cluster dating.
Derivatives
ˌnucleochronoˈlogical adj.
ΘΚΠ
the world > the universe > cosmology > astronomy > stars > [adjective] > nucleochronology
nucleochronological1970
1970 Astrophysical Jrnl. 162 67 It has been shown that the nucleochronological equations can be decoupled such that the long-lived isotopes yield the mean age of the elements..regardless of the time-dependent model used.
1987 Q. Jrnl. Royal Astron. Soc. 28 345 This is well within the error bars on Fowler's nucleochronological age for the Universe.
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1970