Dresden 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 18: Struktur und Dynamik von Kernen
HK 18.4: Vortrag
Montag, 4. März 2013, 17:45–18:00, HSZ-301
Level lifetimes and quadrupole moments from Coulomb excitation in the Ba chain * — •Christopher Bauer1, Giulia Guastalla1, Jörg Leske1, Thomas Möller1, Norbert Pietralla1, Darek Seweryniak2, Christian Stahl1, Robert Stegmann1, Johannes Wiederhold1, and Shaofei Zhu2 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2Argonne National Lab, Chicago, Illinois, U.S.A.
The chain of Barium isotopes enables us to study experimentally the evolution of nuclear quadrupole collectivity from the shell closure at N=82 towards neutron-deficient or neutron-rich deformed nuclei. The TU Darmstadt group has investigated several nuclei from stable 130,132Ba up to radioactive 140,142Ba with the projectile-Coulomb excitation technique including the use of the Doppler-shift attenuation method (DSAM). Lifetimes of quadrupole-collective states of 132Ba and 140Ba were obtained for the first time as well as the static electric quadrupole moments Q(21+) for 130,132Ba and 140,142Ba. The results are compared to Monte Carlo shell model [1] and Beyond-Mean-Field calculations [2].
[1] N. Shimizu et al., Phys. Rev. Lett. 86, 1171-1174 (2001)
[2] C. Bauer et al., Phys. Rev. C 86, 034310 (2012)
* supported by the DFG under Grant No. Pi393/2-2 and the BMBF (05P09RDCI6,05P12RDCIB)