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Project List » Exploratory studies on the stability of nuclear systems

Exploratory studies on the stability of nuclear systems
proiecte.nipne.ro/pn2/21-projects.html


Acronym: STANUC
Contracting Authority: Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI)
Number / Date of the contract: ID-14 / 01.10.2007
Idei
Project Manager: Dr. Doru Delion
Partners:
Starting date / finishing date: 2007-10-01 / 2010-09-30
Project value: 1000000 RON
Abstract: THE INVESTIGATION OF THE EXOTIC NUCLEAR SYSTEMS FAR FROM STABILITY IS ONE OF THE MOST ACTIVE FIELDS OF THE NUCLEAR PHYSICS. WE WILL INVESTIGATE SYSTEMS CHARACTERIZED BY UNUSUAL VALUES OF THE N/Z RATIO (NEUTRON RICH, PROTON RICH NUCLEI), LARGE CHARGE NUMBERS IN SUPERHEAVY NUCLEI, HIGH VALUES OF THE DEFORMATION AND SPIN, RAPIDLY DECAYING THROUGH VARIOUS CHANNELS LIKE PARTICLE OR CLUSTER EMISSION AND FISSION. THE PROJECT WILL ANALYZE NEW IDEAS, BY COVERING SEVERAL IMPORTANT TOPICS: 1. INVESTIGATION OF PROTON RICH NUCLEI BY TWO PROTON EMISION. WE SHALL USE A SIMPLIFIED TWO-BODY SCATTERING APPROACH. WE WILL CONNECT THE ANGULAR DISTRIBUTION OF EMITTED PROTONS, WHICH CAN BE MEASURED, WITH THE TWO-BODY DENSITY ON THE NUCLEAR SURFACE. WE WILL ALSO COMPARE THE COMPUTED TOTAL DECAY WIDTHS WITH EXPERIMENTAL DATA. 2. STUDY OF THE ISOTOPIC YIELDS OF NEUTRON RICH FRAGMENTS IN NUCLEAR FISSION. WE WILL INVESTIGATE THE VERY IMPORTANT ROLE OF THE NUCLEAR STRUCTURE ON THE FISSION DECAY RATE, WITHIN THE TWO CENTER SHELL MODEL. 3. HIGH SPIN ISOMERISM IN SUPERHEAVY NUCLEI. WE WILL PERFORM MICROSCOPIC CALCULATIONS OF THE ALPHA DECAY PROBABILITIES FOR TWO QUASIPARTICLE CONFIGURATIONS WITH LARGE ANGULAR MOMENTUM PROJECTIONS, BY COMPARING THEM WITH TRANSITIONS CONNECTING GROUND STATES. OUR PURPOSE IS TO SHOW THAT SUCH ISOMERIC STATES IN SUPERHEAVY NUCLEI ARE MORE STABLE VERSUS THE ALPHA DECAY MODE THAN THE GROUND STATE. 4. QUALITY CHECK FOR NUMERICAL SOLUTIONS OF EQUATIONS DESCRIBING NUCLEAREAR OPEN SYSTEMS. BY FORMULATING A FLEXIBLE PARAMETER-DEPENDENT EXACTLY SOLVABLE MODEL FOR THE COUPLED CHANNEL SCHRODINGER EQUATION, WE WILL APPLY IT ON A SERIES OF EXISTING CODES TO DRAW CONCLUSIONS ON THEIR HEALTH STATE.

Objectives:

THE STAGES OF THE PROJECT AND DELIVERY DATES
1. Investigation of proton rich nuclei by two proton emision (15 December 2007) (2007-12-15)
2. Study of the isotopic yields of neutron rich fragments in nuclear fission (15 September 2008) (2008-09-15)
3. High spin isomerism in superheavy nuclei (15 September 2009) (2009-09-15)
4. Quality check for the numerical solution of equations describing open nuclear sistems (15 September 2010) (2010-09-15)
RESULTS
PUBLISHED ARTICLES
RESEARCH TEAM


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