Authors:	Nothhelfer, Steven Albrecht-Schönzart, Thomas E. Block, Michael Chhetri, Premaditya Düllmann, Ch. E. Ezold, Julie G. Gadelshin, Vadim Gaiser, Alyssa Giacoppo, F. Heinke, Reinhard Kieck, Tom Kneip, Nina Laatiaoui, Mustapha Mokry, Ch. Raeder, Sebastian Runke, Jörg Sperling, Joseph Michael Thörle-Pospiech, P. Trautmann, Norbert Weber, Felix Wendt, Klaus Schneider, Fabian Studer, Dominik
Title:	Nuclear structure investigations of 253−255 Es by laser spectroscopy
Online publication date:	3-May-2023
Year of first publication:	2022
Language:	english
Abstract:	Laser resonance ionization spectroscopy was performed on the rare einsteinium isotopes 253−255Es at the RISIKO mass separator in Mainz. With low sample sizes ranging down to femtograms, the prominent 352 nm-ground-state transition was measured in all three einsteinium isotopes, and four additional groundstate transitions were measured in 254Es. Hyperfine-structure analysis resulted in assigned spin values of I(254Es) = 7 and I(255Es) = 7/2. From the extracted coupling constants, nuclear magnetic dipole moments of μI (254Es) = 3.42(7) µN and μI (255Es) = 4.14(10) µN as well as spectroscopic electric quadrupole moments of Qs(254Es) = 9.6(1.2) eb and Qs(255Es) = 5.1(1.7) eb were derived. Our value for 254Es deviates from the value of |μI (254Es)| = 4.35(41) µN extracted from the angular anisotropy of α-radiation emitted by 254Es.
DDC:	530 Physik 530 Physics
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 08 Physik, Mathematik u. Informatik Helmholtz Institut Mainz
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-8884
Version:	Published version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	Physical Review C 105
Pages or article number:	L021302
Publisher:	American Institute of Physics
Publisher place:	Woodbury, NY
Issue date:	2022
ISSN:	2469-9993
Publisher DOI:	10.1103/physrevc.105.l021302
Appears in collections:	DFG-491381577-H