Measurement of the Isolated Nuclear Two-Photon Decay in $^{72}\mathrm{Ge}$
Nuclear Experiment
2023-12-19 v1 Nuclear Theory
Abstract
The nuclear two-photon or double-gamma () decay is a second-order electromagnetic process whereby a nucleus in an excited state emits two gamma rays simultaneously. To be able to directly measure the decay rate in the low-energy regime below the electron-positron pair-creation threshold, we combined the isochronous mode of a storage ring with Schottky resonant cavities. The newly developed technique can be applied to isomers with excitation energies down to \,keV and half-lives as short as \,ms. The half-life for the decay of the first-excited state in bare ions was determined to be \,ms, which strongly deviates from expectations.
Cite
@article{arxiv.2312.11313,
title = {Measurement of the Isolated Nuclear Two-Photon Decay in $^{72}\mathrm{Ge}$},
author = {D. Freire-Fernández and W. Korten and R. J. Chen and S. Litvinov and Yu. A. Litvinov and M. S. Sanjari and H. Weick and F. C. Akinci and H. M. Albers and M. Armstrong and A. Banerjee and K. Blaum and C. Brandau and B. A. Brown and C. G. Bruno and J. J. Carroll and X. Chen and Ch. J. Chiara and M. L. Cortes and S. F. Dellmann and I. Dillmann and D. Dmytriiev and O. Forstner and H. Geissel and J. Glorius and A. Görgen and M. Górska and C. J. Griffin and A. Gumberidze and S. Harayama and R. Hess and N. Hubbard and K. E. Ide and Ph. R. John and R. Joseph and B. Jurado and D. Kalaydjieva and K. Kanika and F. G. Kondev and P. Koseoglou and G. Kosir and Ch. Kozhuharov and I. Kulikov and G. Leckenby and B. Lorenz and J. Marsh and A. Mistry and A. Ozawa and N. Pietralla and Zs. Podolyák and M. Polettini and M. Sguazzin and R. S. Sidhu and M. Steck and Th. Stöhlker and J. A. Swartz and J. Vesic and P. M. Walker and T. Yamaguchi and R. Zidarova},
journal= {arXiv preprint arXiv:2312.11313},
year = {2023}
}
Comments
Submitted to Physical Review Letters, 8 pages, 3 figures, 2 tables, 7 equations