Accurate knowledge of the Ne isotopic composition of air is essential for planetary science. While the uncertainty of the noble gas isotopic composition of air has been drastically reduced to the level of ∼0.1% in the last few years thanks to modern techniques, the most widely accepted value of the ²²Ne/²⁰Ne ratio of air (0.102 ± 0.0008, Eberhardt et al., 1965) has an uncertainty of ±0.78% (1σ). Here we present the first multi-laboratory re-determination of the atmospheric ²²Ne/²⁰Ne. An artificial, high purity mixture of ²⁰Ne and ²²Ne was prepared and the ²²Ne/²⁰Ne (0.11888 ± 0.00001, 1σ) and ²⁰Ne/²²Ne (8.4118 ± 0.0007, 1σ) determined gravimetrically.

Eredeti fellelhetőség: mtmt.hu