Yale natural radiocarbon measurements IX.

摘要: No important instrumental modifications have been made since publication of our last list (Yale VII). As before, we are indebted to many collaborators for samples and assistance with descriptions comments. Technical has provided by George Young, Carolyn Haupt, Jonathan Wood. The generous support the National Science Foundation, under grants G-19080 (to Stuiver), G-19335 Deevey), G-24049 Rouse) is gratefully acknowledged. in previous lists, dates reported terms Libby half life C14, 5570 ± 30 yr, geochemical measurements expressed as ∆, normalized deviation from 95 percent NBS oxalic-acid standard. Infinite beyond a limit equal 3o above background.