Loading…

Measurement of the Isolated Nuclear Two-Photon Decay in Ge 72

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...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2024-07, Vol.133 (2), Article 022502
Main Authors: 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., Banerjee, A., Blaum, K., Brandau, C., Brown, B. A., Bruno, C. G., Carroll, J. J., Chen, X., Chiara, C. J., Cortes, M. L., Dellmann, S. F., Dillmann, I., Dmytriiev, D., Forstner, O., Geissel, H., Glorius, J., Görgen, A., Górska, M., Griffin, C. J., Gumberidze, A., Harayama, S., Hess, R., Hubbard, N., Ide, K. E., John, Ph. R., Joseph, R., Jurado, B., Kalaydjieva, D., Kanika, Kondev, F. G., Koseoglou, P., Kosir, G., Kozhuharov, Ch, Kulikov, I., Leckenby, G., Lorenz, B., Marsh, J., Mistry, A., Ozawa, A., Pietralla, N., Podolyák, Zs, Polettini, M., Sguazzin, M., Sidhu, R. S., Steck, M., Stöhlker, Th, Swartz, J. A., Vesic, J., Walker, P. M., Yamaguchi, T., Zidarova, R.
Format: Article
Language:English
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 ∼ 100 keV and half-lives as short as ∼ 10 ms . The half-life for the 2 γ decay of the first-excited 0 + state in bare Ge 72 ions was determined to be 23.9(6) ms, which strongly deviates from expectations. Published by the American Physical Society 2024
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.133.022502