Ionising radiation, or rather the lack of ionising radiation, can be used to verify the age of wine without opening the bottle.

Nuclear testing in the mid-20th century introduced caesium-137 into the atmosphere, and wines produced after about 1950 contain trace amounts of this isotope. Testing for caesium-137 can help authenticate the vintage of the wine, distinguishing pre-nuclear wines from those that might be fraudulently labelled as older than they really are.

Caesium-137 dating has the additional benefit of being non-destructive, with direct gamma measurements being taken through the bottle. Traditional carbon-14 dating is usually destructive (as carbon-14 is a low energy beta emitter and requires a physical sample to be measured), so caesium-137 dating is particularly important for rare vintages.

Source: P. P. Povinec, et al. Radiocarbon and 137Cs dating of wines, Journal of Environmental Radioactivity 217, 106205 (2020).