Shape coexistence in 187Au studied by laser spectroscopy

Anatoly (A.E.) Barzakh, Dimitar Atanasov, Andrei N. Andreyev, Numa A. Althubiti, Boris Andel, Stanislav Antalic, Klaus Blaum, Thomas Elias Cocolios, Cubiss James G., Piet Van Duppen, Thomas Day Goodacre, Gregory James Farooq-Smith, Dmitry V. Fedorov, Valentin N. Fedosseev, Daniel A. Fink, Liam Paul Gaffney, Lars Ghys, Mark Huyse, Nobuaki Imai, S. KreimDavid Lunney, Kara M Lynch, Vladimir Manea, Bruce A Marsh, P.L. Molkanov, Dennis Neidherr, M. Rosenbusch, Ralf Erik Rossel, Sebastian Rothe, Lutz Schweikhard, Maxim D. Seliverstov, Simon Sels, Celine Van Beveren, Verstraelen Elise, A. Welker, Frank Wienholtz, R.N. Wolf, Kai Zuber

Research outputpeer-review


Hyperfine-structure parameters and isotope shift of the 9/2− isomeric state in 187Au relative to 197Au for the 267.6-nm atomic transition have been measured for the first time using the in-source resonance-ionization spectroscopy technique. The magnetic dipole moment and change in the mean-square charge radius for this 9/2− isomer have been deduced. The observed large isomer shift relative to the 1/2+ ground state in 187Au confirms the occurrence of the shape coexistence in 187Au proposed earlier from the analysis of the nuclear spectroscopic data and particle plus triaxial rotor calculations. The analysis of the magnetic moment supports the previously proposed 9/2−, 1/2−[541] assignment at moderate prolate deformation for 187 aUm.
Original languageEnglish
Article number064321
Pages (from-to)1-7
Number of pages7
JournalPhysical Review C
StatePublished - 25 Jun 2020

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