Darmstadt 2008 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 13: Stossprozesse, Energietransfer II (gemeinsam mit A)
MO 13.4: Vortrag
Donnerstag, 13. März 2008, 12:00–12:15, 3F
A systematic study of the beta-decay properties — •Ivan Borzov1, Jose Cuenca-García1, Karlheinz Langanke1, Gabriel Martínez-Pined1, and Fernando Montes2 — 1GSI, Darmstadt, Plankstr. 1, D-64291, Darmstadt, Germany — 2National Superconducting Cyclotron Lab., Michigan State University, East Lancing, MI 48824, USA
A self-consistent approach to the nuclear ground states and spin-excitations based on the local energy-density functional (DF) theory and continuum QRPA is presented. Systematic calculations of the total β-decay rates for the nuclei with charge numbers Z=24-31, 42-49, 72-78, 82-89 approaching the possible r-process paths in vicinity of the spherical neutron shells at N=50, 82, 126 are calculated and compared with the experimental data. When available, the half-lives obtained on the basis of the Finite Range Droplet Model and the shell model are compared to our results. The effects of our calculated half-lives on the r-process abundances in the A=90-130 mass region are explored in r-process simulations.
1.J.J. Cuenca- Garcia, G. Martinez-Pinedo, K. Langanke, F. Nowacki, I.N. Borzov, 2007, Eur.J.Phys. epja/i2007-10477-3. 2.Kurtukian-Nietto T., Benluire J, and GSI Collaboration First access to beta half-lives approaching the r-process path near N=126., 2007, (submitted to Phys. ReV. Lett); nucl-ex 0711.0101. 3.I.N. Borzov, J.J. Cuenca- Garcia, G. Martinez-Pinedo, K. Langanke, F. Montes, 2007, (submitted to Nucl.Phys. A).