Nuclear Charge Radius of ${}^9$Be from Muonic Atom Spectroscopy Using a Microcalorimeter

Ofir Eizenberg, Shikha Rathi, Andreas Abeln +34

The authors measured the 2p→1s transition energy in muonic 9Be with a metallic magnetic calorimeter, obtaining a nuclear charge radius of 2.5506 fm with unprecedented precision, su…