Applied Radiation and Isotopes68(7–8),1561–1565(2010), DOI10.1016/j.apradiso.2009.11.052. Primary abstract verifies byline Eduardo García-Toraño, Virginia Peyrés Medina and Miguel Roteta Ibarra; three detector systems, measurements up to nine half-lives and reported1.82871(18)h. This is the result of that experiment, not a claim about the latest evaluated value.