transfer- and fragmentation reactions near fermi-energy production of exotic nuclei
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
TRANSFER- AND FRAGMENTATION REACTIONS NEAR FERMI-ENERGY
Production of Exotic nucleiProduction of Exotic nuclei
Supervisors
A.G. Artyukh
B. Erdemchimeg
Presented By
S.P. Bvumbi
H.W. Groenewald
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The who, what and where…The who, what and where…
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MotivationMotivation
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• 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
MotivationMotivation
1111BB2727AlAl
88LiLi
3030P (?)P (?)
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• 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
Why near Fermi-energy?Why near Fermi-energy?
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КОМплекс Быстродействующего Анализатора Спектрометра
COMBAS / КОМБАСCOMBAS / КОМБАС
COMplex (B)High-speed Analysing Spectrometer
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COMBAS / КОМБАСCOMBAS / КОМБАС
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COMBAS / КОМБАСCOMBAS / КОМБАС
thin targetprimary beam
E ~ a few MeV/A
E ~ a few MeV/A
TOF – Time Of Flight
B - magnetic rigidityB – vector of magnetic field - radius of particle trajectory
degrader dE – energy losses
start stopdetectors
BB11 < B< B22<< BB33
BB11
BB22
BB33
B - magnetic rigidityB =M/q
if const then B ~ M/q
because M=A, q=Z B ~ A/Z
if v = constthen A/Z (6He) = A/Z (9Li) = 3
the same trajectory for the same B !!
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Data AnalysisData Analysis
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Data Analysis – Lise++Data Analysis – Lise++
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Data Analysis – Lise++Data Analysis – Lise++
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Data AnalysisData Analysis
66LiLi
77LiLi
88LiLi
99BeBe
1010BeBe
44HeHe
66HeHe
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Data AnalysisData Analysis
66LiLi2+2+
88LiLi2+2+77LiLi3+3+
77LiLi2+2+66LiLi3+3+
88LiLi3+3+
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Data AnalysisData Analysis
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ResultsResults
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ResultsResults
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• 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!
ConclusionsConclusions
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