Nature(London) 622, 471 (2023)

Y.Shvyd'ko, R.Rohlsberger, O.Kocharovskaya, J.Evers, G.A.Geloni, P.Liu, D.Shu, A.Miceli, B.Stone, W.Hippler, B.Marx-Glowna, I.Uschmann, R.Loetzsch, O.Leupold, H.-C.Wille, I.Sergeev, M.Gerharz, X.Zhang, C.Grech, M.Guetg, V.Kocharyan, N.Kujala, S.Liu, W.Qin, A.Zozulya, J.Hallmann, U.Boesenberg, W.Jo, J.Moller, A.Rodriguez-Fernandez, M.Youssef, A.Madsen, T.Kolodziej

Resonant X-ray excitation of the nuclear clock isomer ⁴⁵Sc

RADIOACTIVITY ⁴⁵Sc(IT) [from ⁴⁵Sc(γ, γ'), E=12.4 keV]; measured decay products, Eγ, Iγ; deduced precise of value of the isomeric state transition energy, application of this isomer in extreme metrology, nuclear clock technology, ultra-high-precision spectroscopy. Comparison with available data. EuXFEL, X-ray free-electron lasers (XFELs).

doi: 10.1038/s41586-023-06491-w