ISOLDE Workshop and Users meeting 2008

Session

Nuclear Phenomena

18 Nov 2008, 16:30

503/1-001 - Council Chamber (CERN)

2. Beta-delayed fission in the Pb region

Dr Andrei Andreyev (IKS)

18/11/2008, 16:30

Beta-delayed (EC/b+, b-) fission is a rare nuclear decay process in which the beta-decaying parent nuclide populates excited states in its daughter, which may then fission. This process allows studies of low-energy fission properties, e.g., the poorly known isospin dependence of the fission barriers of neutron-rich and neutron-deficient nuclei which do not decay via spontaneous fission at...

24. A new determination of the |V_ud| quark mixing matrix element

Severijns Nathal (Instituut voor Kern- en Stralingsfysica - KU-University of Leuve)

18/11/2008, 17:00

Recently, a complete analysis of the half-lives and branching ratios for the beta transitions between isospin T = 1/2 isospin doublets in mirror nuclei, together with detailed calculations of the radiative, isospin-symmetry breaking and nuclear structure corrections, have provided the corrected Ft-values for these mirror transitions up to A = 45. Combining these Ft-values with results from...

11. Improved formalism for superallowed Fermi beta decay between analogs and half-lives of rp-process waiting point A~70 nuclei

Prof. Alexandrina Petrovici (National Institute of Physics and Nuclear Engineering (IFIN-HH)-)

18/11/2008, 17:30

We present a variational treatment of the effects of the isospin-symmetry breaking on the superallowed Fermi $\beta$ decay of medium mass nuclei dominated by shape coexistence and mixing allowing for a simultaneous description of the analog as well as significant non-analog branches. The Gamow-Teller strength distributions and the half-lives for the beta decay of the ground state and the...

0. TRIGA-TRAP: High-precision mass measurements on heavy nuclides

Jens Ketelaer (Universität Mainz, Institut für Physik, Staudinger Weg 7, D-55128 Mainz, Germany)

18/11/2008, 17:50

Nuclear masses are fundamental quantities in nature, reflecting the binding energy of the nucleons. In particular, experimentally determined masses of heavy nuclides provide new information on nuclear structure and test theoretical mass models in this region of the nuclear chart [1,2]. Masses of a few nobelium isotopes have been recently determined by SHIPTRAP (GSI, Darmstadt, Germany)....