September 15, 2014 to October 10, 2014
Nordita, Stockholm
Europe/Stockholm timezone

Morning Session: Alpha Condensates. Alpha-decay: a computational challenge

Sep 30, 2014, 9:30 AM
2h
132:028 (Nordita, Stockholm)

132:028

Nordita, Stockholm

Speakers

Doru Sabin Delion Peter Schuck

Description

Alpha-decay: a computational challenge D.S. Delion, R.J. Liotta, and A. Dumitrescu The microscopic description of alpha decay widths is an old but still challenging issue. The standard mean field plus residual interaction is not able to reproduce the absolute value of the decay width. We propose two ways to cure this defficiency, namely by introducing a new single particle diagonalization basis with two harmonic oscillator parameters [1] and by increasing proton-neutron correlations through a surface cluster component in addition to the standard nuclear the mean field [2]. We describe alpha decay fine structure by using a common approach for spherical, transitional and deformed nuclei [3]. The investigation of the alpha decay fine structure is a powerfull tool to probe nuclear structure. We use projected coherent states to describe the structure of daugher nuclei and a quadrupole-quadrupole alpha-core interaction for alpha transitions to excited states. It turns out that the strength of this interaction, reproducing alpha transitions to 2+ states, is proportional to the clustering probability. Predictions for electromagnetic and alpha transitions to excited state are made for all available even-even emitters. The coupled channel analysis for alpha transitions in odd mass nuclei is proposed as a promising tool to investigate nuclear structure, by the using both spectroscopic and alpha decay data. This work was supported by the strategic grant POSDRU/159/1.5/S/137750 and by the grant PN-II-ID-PCE-2011-3-0092 of the Romanian ANCS. [1] D.S. Delion, A. Insolia, R.J. Liotta, Physical Review C 54, 292 (1996). [2] D.S. Delion, R.J. Liotta, Physical Review C 87, 024309 (2013). [3] D.S. Delion, A. Dumitrescu, Physical Review C 87, 041302(R) (2013).

Presentation materials