Template talk:Infobox lanthanum
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Semi-protected edit request on 3 January 2018[edit]
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Decay of 138-La isn't electron capture but beta plus. 212.37.64.44 (talk) 10:27, 3 January 2018 (UTC)
Not done, though this is an interesting case, and thank you for bringing it to our attention! Despite being listed in some reference books as beta-plus, lanthanum-138 does not actually release enough energy to undergo beta-plus; for that the mass difference between it and its daughter would have to be at least twice the mass of an electron, and it isn't. You can also see that in its half-life determination only EC and beta-minus were found, not beta-plus. So this seems to be a mistake in isotopes of lanthanum rather than here. Double sharp (talk) 10:46, 3 January 2018 (UTC)
