### Abstract

A first measurement of the spectral distribution of the two-photon decay of the 1s2s ^{1}S_{0} level in heliumlike gold is reported. This study extends our earlier work for heliumlike krypton and nickel to higher atomic numbers Z into the fully relativistic regime. The measured spectral shape of the two-photon decay differs from that observed at intermediate Z but is in agreement with the results of a recent fully relativistic calculation of Derevianko and Johnson.

Original language | English |
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Pages (from-to) | 469-471 |

Number of pages | 3 |

Journal | Physica Scripta T |

Volume | 80 |

Issue number | B |

Publication status | Published - Dec 1 1999 |

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics
- Mathematical Physics
- Condensed Matter Physics

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## Cite this

Schäffer, H. W., Mokler, P. H., Dunford, R. W., Kozhuharov, C., Krämer, A., Ludziejewski, T., Prinz, H. T., Rymuza, P., Sarkadi, L., Stöhlker, T., Swiat, P., & Warczak, A. (1999). Measurement of the spectral distribution for the two-photon decay of the 1s2s

^{1}S_{0}level in heliumlike gold.*Physica Scripta T*,*80*(B), 469-471.