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TRANSFER- AND FRAGMENTATION REACTIONS NEAR FERMI-ENERGY Production of Exotic nuclei

TRANSFER- AND FRAGMENTATION REACTIONS NEAR FERMI-ENERGY Production of Exotic nuclei. Supervisors A.G. Artyukh B. Erdemchimeg. Presented By S.P. Bvumbi H.W. Groenewald. The who, what and where…. Motivation. Motivation.

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TRANSFER- AND FRAGMENTATION REACTIONS NEAR FERMI-ENERGY Production of Exotic nuclei

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  1. TRANSFER- AND FRAGMENTATION REACTIONS NEAR FERMI-ENERGYProduction of Exotic nuclei Supervisors A.G. Artyukh B. Erdemchimeg Presented By S.P. Bvumbi H.W. Groenewald

  2. The who, what and where…

  3. Motivation

  4. Motivation • Reaction mechanism – Transfer and Fragmentation reactions through deep inelastic scattering • Production of radioactive beams • Can be applied to heavier nuclei to maybe reach island of stability 8Li 11B 30P (?) 27Al

  5. Why near Fermi-energy? • A projectile nucleus traveling with energy near Fermi-energy has same velocity as nucleons moving inside target nucleus • “Cold” fragments – All products have a small excitation energy • Initial and final velocity of projectile / beam will be approximately equal • Fermi-energy ≈ 37 MeV

  6. COMBAS / КОМБАС COMplex (B)High-speed Analysing Spectrometer КОМплекс Быстродействующего Анализатора Спектрометра

  7. COMBAS / КОМБАС

  8. B - magnetic rigidityB =M/q if   const then B ~ M/qbecause M=A, q=ZB ~ A/Z if v = constthen A/Z (6He) = A/Z (9Li) = 3 COMBAS / КОМБАС B - magnetic rigidityB – vector of magnetic field  - radius of particle trajectory E ~ a few MeV/A primary beam thin target start stop detectors the same trajectory for the same B !! TOF – Time Of Flight B1 B3 B2 B1< B2<B3 degrader dE – energy losses E ~ a few MeV/A

  9. Data Analysis

  10. Data Analysis – Lise++

  11. Data Analysis – Lise++ 11

  12. 10Be 9Be 8Li 7Li 6He 6Li 4He Data Analysis 12

  13. Data Analysis 8Li3+ 8Li2+ 7Li3+ 7Li2+ 6Li3+ 6Li2+ 13

  14. Data Analysis ? ? ? ? ? ? 14

  15. Results

  16. Results

  17. Conclusions • COMBAS successful in separating isotopes with identical Bρ • Isotope identification was successful due to LISE++ simulations (For higher values of Bρ) • Estimations of Relative Yields for the isotopes were calculated • Can be applied in the use of exotic radioactive beams • Creation of nuclei in Island of Stability may be possible!

  18. Спасибо Ndo livhuwa Baie dankie

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