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Measurement of the Isolated Nuclear Two-Photon Decay in ${}^{72}{Ge}$

https://doi.org/10.1103/PhysRevLett.133.022502

Freire-Fernández, D; Korten, W; Chen, R J; Litvinov, S; Litvinov, Yu A; Sanjari, M S; Weick, H; Akinci, F C; Albers, H M; Armstrong, M; et al (July 2024, Physical Review Letters)

The nuclear two-photon or double-gamma ( $2 γ$ ) 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 $2 γ$ 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 $\sim 100 keV$ and half-lives as short as $\sim 10 ms$ . The half-life for the $2 γ$ decay of the first-excited $0^{+}$ state in bare ${}^{72}{Ge}$ ions was determined to be 23.9(6) ms, which strongly deviates from expectations. Published by the American Physical Society2024
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Revised decay properties of the key 93-keV resonance in the ${}^{25}{Mg} (p, γ)$ reaction and its influence on the MgAl cycle in astrophysical environments

https://doi.org/10.1103/PhysRevC.105.L042801

Lotay, G.; Doherty, D. T.; Janssens, R. V.; Seweryniak, D.; Albers, H. M.; Almaraz-Calderon, S.; Carpenter, M. P.; Champagne, A. E.; Chiara, C. J.; Hoffman, C. R.; et al (April 2022, Physical Review C)

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New constraints on the ${}^{25}{Al} (p, γ)$ reaction and its influence on the flux of cosmic $γ$ rays from classical nova explosions

https://doi.org/10.1103/PhysRevC.104.L022802

Canete, L.; Lotay, G.; Christian, G.; Doherty, D. T.; Catford, W. N.; Hallam, S.; Seweryniak, D.; Albers, H. M.; Almaraz-Calderon, S.; Bennett, E. A.; et al (August 2021, Physical Review C)

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