@article{1269896, author = {Andrew Fenwick and Denis Bergeron and Brittany Broder and Emma Bendall and Jeffrey Cessna and Sean Collins and Leticia Pibida and Natasha Ramirez and Elisa Napoli}, title = {A bilateral comparison of 227Th activity standards between NPL and NIST}, year = {2025}, number = {62}, month = {2025-02-03 05:02:00}, publisher = {Metrologia}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=958444}, doi = {https://doi.org/10.1088/1681-7575/adac65}, language = {en}, }