Speaker
Mr
Wolfgang Schwerdtfeger
(Ludwig-Maximilians-University, Munich, Germany)
Description
The 1789~keV level in 30Mg was unambiguously identified as the second
excited 0+ state by measuring its E0 transition to the ground state via
conversion electron spectroscopy. This
level corresponds to the strongly deformed intruder 0+ state, thus proving
for the first time shape coexistence in this nucleus at the borderline of the
'Island of Inversion' around N ~20. The matrix element
rho^2(E0,0+_2 -> 0+_1) = 3.6(7) E-3 allows to deduce
the squared mixing amplitude a^2 between the unperturbed lowest two
0+ states, indicating a rather weak coupling between the spherical and
deformed configurations.
One week of beamtime was dedicated for the conversion electron
measurement in 30Mg following the beta decay of 30Na which took
place in August 2007 at ISOLDE.
Author
Mr
Wolfgang Schwerdtfeger
(Ludwig-Maximilians-University, Munich, Germany)
Co-authors
Prof.
Dietrich Habs
(Ludwig-Maximilians-University, Munich, Germany)
Prof.
Henryk Mach
(Department of Radiation Sciences, Uppsala University, Sweden)
Prof.
Herbert Huebel
(Institut of Radiation and Nuclear Physics, University Bonn, Germany)
Mrs
Kathrin Wimmer
(Ludwig-Maximilians-University, Munich, Germany)
Prof.
Kris Heyde
(Department of Subatomic and Radiation Physics, Universiteit Gent, Belgium)
Dr
Luis Fraile
(CERN, Geneva, Switzerland)
Prof.
Per Hoff
(Department of Chemistry, University of Oslo, Norway)
Prof.
Peter Ring
(Technical University, Munich, Germany)
Dr
Peter Thirolf
(Ludwig-Maximilians-University, Munich, Germany)
Dr
Ralf Hertenberger
(Ludwig-Maximilians-University, Munich, Germany)
Prof.
Reiner Kruecken
(Technical University, Munich, Germany)
Dr
Roman Gernhaeuser
(Technical University, Munich, Germany)
Mr
Rudolph Lutter
(Ludwig-Maximilians-University, Munich, Germany)
Mr
Thomas Morgan
(Ludwig-Maximilians-University, Munich, Germany)
Dr
Thorsten Kroell
(Technical University, Munich, Germany)
Dr
Ulrich Koester
(ILL, Grenoble, France)
Mr
Vinzenz Bildstein
(Technical University, Munich, Germany)
