2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 15, 205-208 (2002)
DOI: 10.1140/epja/i2001-10255-3

In-beam spectroscopy of $\chem{{}^{253,254}No}$

R.-D. Herzberg1, N. Amzal1, J.E. Bastin1, F. Becker2, P.M.T. Brew1, P.A. Butler1, A.J.C. Chewter1, J.F.C. Cocks3, O. Dorvaux3, K. Eskola4, J. Gerl5, P.T. Greenlees3, N.J. Hammond1, K. Hauschild2, K. Helariutta3, 4, 5, F. Heßberger5, M. Houry2, A. Hürstel2, R.D. Humphreys1, G.D. Jones1, P.M. Jones3, R. Julin3, S. Juutinen3, H. Kankaanpää3, H. Kettunen3, T.L. Khoo6, W. Korten2, P. Kuusiniemi3, Y. Le Coz2, M. Leino3, A.P. Leppänen C.J. Lister6, R. Lucas2, M. Muikku3, P. Nieminen3, R.D. Page1, T. Page1, P. Rahkila3, P. Reiter7, Ch. Schlegel5, C. Scholey1, G. Sletten8, O. Stezowski1, Ch. Theisen2, W.H. Trzaska3, J. Uusitalo3 and H.J. Wollersheim5

1  Oliver Lodge Laboratory, University of Liverpool, UK
2  DAPNIA/SPhN CEA-Saclay, France
3  Department of Physics, University of Jyväskylä, Finland
4  University of Helsinki, Finland
5  GSI Darmstadt, Germany
6  Argonne National Laboratory, USA
7  Ludwig Maximilians Universität München, Germany
8  Nils Bohr Institute, University of Copenhagen, Denmark

rdh@ns.ph.liv.ac.uk

(Received: 21 March 2002 / Published online: 31 October 2002)

Abstract
In-beam conversion electron spectroscopy experiments have been performed on the transfermium nuclei $\chem{{}^{253,254}No}$ using the conversion electron spectrometer SACRED in nearly collinear geometry in conjunction with the gas-filled separator RITU at the University of Jyväskylä. The experimental setup is discussed and the spectra are compared to Monte Carlo simulations. The implications for the ground-state configuration of $\chem{{}^{253}No}$ are discussed.

PACS
21.10.-k - Properties of nuclei; nuclear energy levels.
23.20.Lv - Gamma transitions and level energies.
23.20.Nx - Internal conversion and extranuclear effects.
27.90.+b - $A \geq 220$ .

© Società Italiana di Fisica, Springer-Verlag 2002