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Project List » NUCLEAR STRUCTURE OF EXOTIC NUCLEI: CHANGES OF MAGIC NUMBERS, DEFORMATIONS AND SHAPE COEXISTENCE

NUCLEAR STRUCTURE OF EXOTIC NUCLEI: CHANGES OF MAGIC NUMBERS, DEFORMATIONS AND SHAPE COEXISTENCE
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Acronym: EXOMAG
Contracting Authority: Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI)
Number / Date of the contract: 293 / 1.10.2007
Idei
Project Manager: Florin Negoita
Partners:
Starting date / finishing date: 2007-10-01 / 2010-09-30
Project value: 1000000 RON
Abstract: IN NUCLEI VERY FAR FROM THE BETA STABILITY VALLEY, WITH LARGE DIFFERENCES BETWEEN THE NEUTRON AND PROTON NUMBERS, THE STABLE NUCLEI EQUILIBRIUM OF STRONG, ELECTROMAGNETIC AND WEAK FORCES THAT GOVERN THE NUCLEAR STRUCTURE IS CHANGED, GENERATING NEW PHENOMENA AND THE NECESSITY TO RECONSIDER SOME OF THE FUNDAMENTAL CONCEPTS AS SHELL MODEL AND THE NUCLEAR MAGIC NUMBERS. AFTER CONFIRMING THE PRESENCE OF DEFORMATION FOR VERY NEUTRON-RICH NUCLEI AROUND N=20, MAGIC NUMBER FOR STABLE NUCLEI, THE SAME PHENOMENON IS PREDICTED AROUND N=28. HOWEVER, A RECENT ARTICLE, NATURE 435(2005)922, BRINGS ARGUMENTS FOR THE SPHERICITY OF 42SI (14 PROTONS AND 28 NEUTRONS) SUGGESTING Z=14 AS A NEW MAGIC NUMBER IN THIS REGION. PREVIOUS RESULTS OF OUR GROUP, THE SHORT LIFETIME OF 42SI AND A 0+ ISOMER IN 44S, SUSTAIN THE APPEARANCE OF DEFORMATION AND SHAPE COEXISTENCE. THE PRESENT PROJECT AIMS THE STUDY OF THIS PHENOMENON BY OBTAINING NEW INFORMATION OUT OF TWO EXPERIMENTS DONE AT GANIL (FRANCE) THE ANALYSIS OF WHICH IS TO BE FINALIZED AND OF ANOTHER APPROVED EXPERIMENT AT THE SAME EUROPEAN FACILITY. THE PREPARATION, REALIZATION, AND ANALYSIS FOR THE LATER ARE THE MAIN ACTIVITY OF THE PROJECT. ADDITIONALLY, THE STUDY OF SHAPE COEXISTENCE PHENOMENON IS PROPOSED BY DOING COMPLEMENTARY EXPERIMENTS AT THE TANDEM ACCELERATOR OF IFIN-HH. THROUGH THE TACKLED THEME, THE PROJECT PREPARES THE PARTICIPATION TO THE RADIOACTIVE BEAMS STUDIES AT THE FUTURE EURISOL AND SPIRAL2 FACILITIES SUSTAINED BY FP 6 AND FP 7 PROJECTS. THE ROMANIAN PARTICIPATION TO THOSE PROJECTS IS CO-ORDINATED BY THE DIRECTOR OF THIS PROJECT. NOT LEAST, THE PRESENT PROJECT IS OFFERING FINANCIAL SUPPORT FOR A PHD STUDENT AND MODERN SUBJECTS FOR PHD AND LICENSE/MASTER THESES, MAINLY OBTAINED BY LOCAL ACTIVITIES IN DIRECT CONTACT WITH AN INTERNATIONAL COLLABORATION GROUPED AROUD ONE OF THE LARGEST FACILITIES IN THE FIELD OF NUCLEAR STRUCTURE.

Objectives:

THE STAGES OF THE PROJECT AND DELIVERY DATES
1.  (2007-12-15)
2.  (2008-06-15)
3.  (2008-12-15)
4.  (2009-06-15)
5.  (2009-12-15)
6.  (2010-09-27)
RESULTS
PUBLISHED ARTICLES
RESEARCH TEAM


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