• Letter
  • Open Access

Nuclear structure investigations of Es253255 by laser spectroscopy

S. Nothhelfer, Th. E. Albrecht-Schönzart, M. Block, P. Chhetri, Ch. E. Düllmann, J. G. Ezold, V. Gadelshin, A. Gaiser, F. Giacoppo, R. Heinke, T. Kieck, N. Kneip, M. Laatiaoui, Ch. Mokry, S. Raeder, J. Runke, F. Schneider, J. M. Sperling, D. Studer, P. Thörle-Pospiech, N. Trautmann, F. Weber, and K. Wendt
Phys. Rev. C 105, L021302 – Published 4 February 2022

Abstract

Laser resonance ionization spectroscopy was performed on the rare einsteinium isotopes Es253255 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 ground-state transitions were measured in Es254. Hyperfine-structure analysis resulted in assigned spin values of I(Es254)=7 and I(Es255)=7/2. From the extracted coupling constants, nuclear magnetic dipole moments of μI(Es254)=3.42(7)μN and μI(Es255)=4.14(10)μN as well as spectroscopic electric quadrupole moments of Qs(Es254)=9.6(1.2)eb and Qs(Es255)=5.1(1.7)eb were derived. Our value for Es254 deviates from the value of |μI(Es254)|=4.35(41)μN extracted from the angular anisotropy of α-radiation emitted by Es254.

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  • Received 23 July 2021
  • Accepted 3 January 2022

DOI:https://doi.org/10.1103/PhysRevC.105.L021302

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. Nothhelfer1,2,3, Th. E. Albrecht-Schönzart4, M. Block1,2,3, P. Chhetri2,3, Ch. E. Düllmann1,2,3, J. G. Ezold5, V. Gadelshin1,6, A. Gaiser4,*, F. Giacoppo2,3, R. Heinke1,†, T. Kieck1,2,3, N. Kneip1, M. Laatiaoui1,2,3, Ch. Mokry1,2, S. Raeder2,3, J. Runke1,3, F. Schneider1,2, J. M. Sperling4, D. Studer1, P. Thörle-Pospiech1,2, N. Trautmann1, F. Weber1, and K. Wendt1

  • 1Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
  • 2Helmholtz-Institut Mainz, 55099 Mainz, Germany
  • 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
  • 4Florida State University, 32306 Tallahassee, Florida, USA
  • 5Oak Ridge National Laboratory, Oak Ridge, 37831 Oak Ridge, Tennessee, USA
  • 6Ural Federal University, 620002 Yekaterinburg, Russia

  • *Present address: Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Present address: CERN, CH-1211 Geneva 23, Switzerland.

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Vol. 105, Iss. 2 — February 2022

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