Fig. 4: \(^{233}\)U/\(^{236}\)U ratio in the Irish Sea. | Nature Communications

Fig. 4: \(^{233}\)U/\(^{236}\)U ratio in the Irish Sea.

From: 233U/236U signature allows to distinguish environmental emissions of civil nuclear industry from weapons fallout

Fig. 4

Depth profile of the \(^{233}\)U/\(^{236}\)U atom ratio in the Irish Sea sediment core collected close to the Sellafield reprocessing plant and in Irish Sea water (IAEA-381) with ±1 \(\sigma\) uncertainty. Increased uncertainties of three samples at depths 11 cm, 23 cm and 47 cm are caused by low counting statistics on \(^{233}\)U due to preceding dilution (1:100) of the material. The horizontal blue line marks the weighted average for the \(^{233}\)U/\(^{236}\)U ratio in the Irish Sea with ±1 \(\sigma\) uncertainty (s.e.m.).

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