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Project List » Dynamics of Binary Quantum Systems

Dynamics of Binary Quantum Systems
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Acronym: DISCUBI
Number / Date of the contract: CEX-05-D10-74 / 14.10.2005
modul 1
Project Manager: Radu Alexandru Gherghescu
Partners: Politechnic University of Bucharest University of Bucharest
Starting date / finishing date: 2005-10-14 / 2008-10-14
Project value: 1500000 RON
Abstract: The main goal of the project is to improve the theoretical description of the dynamics of binary quantum systems, a key issue in the physics of synthesis and decay properties of heavy and superheavy elements, a hot topic in the world, in which European scientists play a leading role (element 110 was named Darmstadtium in 2003). In order to explain the individual properties of the initial and final participants and their interaction during the formation and decay, an approach allowing to follow continuously the quantum system evolution will be used. It is based on a further improvement of the most advanced two center shell model developed in our group. A finite-depth Woods-Saxon potential well, allowing to obtain levels in the continuum, will be employed to develop a new type of two center shell model. The dynamics involves calculation of the action integral and its minimization after introducing the multidimensional hydrodinamical inertia tensor and the potential barrier according to the macoscopic-microscopic method. Also the coupled-channels approach will be used to compute the total width, angular distribution and the fine structure of the low-lying states of emitted fragments. Charge-density variation properly taken into account in the single particle model and the extension of the residual pairing interaction during the overlapping stage may be mentioned among the new features of the model. The obtained results will be used by experimentalists to choose the most favourable pair of partners for the production of superheavy compound systems and to estimate the halflife against fission, cluster emission, alpha-decay and proton radioactivity. Proton emission will be studied by solving numerically the time-dependent Schroedinger equation. As a multidisciplinary aspect, one should mention the potential applicability of the two center shell model to study the nano-science of atomic clusters and some binary and ternary molecules . By taking into account the expertise of participating scientiststo, their international cooperations with prestigious experts from Europe, USA and Japan, the objectives of the present project have high chances to be achieved. Key members of our team are very experienced as coordinators and participants in the European Commission Centre of Excellence IDRANAP from IFIN-HH and other international projects.

THE STAGES OF THE PROJECT AND DELIVERY DATES
1.  (2005-11-15)
2.  (2006-11-30)
3.  (2007-08-27)
4.  (2007-12-05)
5.  (2008-07-31)

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