Eur. Phys. J. A 11, 403-411 (2001)
Covalently bound molecular structures in the
system
W. von Oertzen1, 2
1 Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
2 Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, 14109 Berlin, Germany
oertzen@hmi.de
(Received: 11 July 2001 Communicated by P. Schwalm)
Abstract
Using the concept of covalent molecular orbitals for neutrons and the known properties of the
local
potential the formation of asymmetric molecular structures
in neon isotopes is discussed. Experimental evidence for parity doublets in
21Ne is reviewed and a corresponding band structure
for the states in 21Ne at moderate excitation energy of
Ex=0 - 8 MeV is proposed.
The structure of some bands can be interpreted as consisting of an instrinsic asymmetric
(
4He+16O) structure bound by a covalent neutron in 
and 
orbitals.
An extension of the observed structures to symmetric molecular structures in isotopes
of Mg and heavier nuclei is suggested.
In particular shape isomers in isotopes of magnesium, namely (He)2O molecules, can be predicted
and an extended Ikeda diagram is proposed.
21.10.-k - Properties of nuclei; nuclear energy levels.
21.60.Gx - Cluster models.
© Società Italiana di Fisica, Springer-Verlag 2001
