fusion cross section of 38s+208pb
TRANSCRIPT
Fusion Cross Section of 38S+208Pb
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BACKGROUND
Atoms, Nuclei, Protons & Neutrons
The strong nuclear force is pronounced between nucleons found within any nuclei.
Nucleons:
• Protons
• Neutrons
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Addition of Nucleons
Neutron Proton2
216
38 – SSulfur
UNSTABL
E
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Field of Research
Strong Nuclear Force
Nuclear fusion occurs when nuclei come in close proximity(femto-meter range)and form a bigger nucleus.
CALIFORNIUM246
Nuclear Fusion
Take for an example38S+208Pb which form…
Implications for Society andthe Physics Community
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Research Question
Research Question
How do Time Dependent Hartree- Fock (TDHF) calculations compare with experimental results by Loveland et al. on the fusion cross section of 38S+208Pb ?
36S+208Pb 34S+208
Pb 32S+208Pb
38S+208Pb
STABLE
UNSTABLE
Loveland’s Experimental Data
Loveland et al. Phy. Rev. C 74, 044607 (2006)
Tools and Methods.
KEEP CALMANDUSE
TIME DEPENDENTHARTREE – FOCK
THEORYCODE
Computer Simulations.
HPCC Supercomputer.
TDHF code.
C. Simenel, Eur. Phys. J A 48, 152 (2012)
How TDHF code works
Ψ
Ψ
Ψ
Ψ
Code developed by Paul Bonche in the 70’s.Currently maintained by Simenel Cedric.
C. Simenel, Eur. Phys. J A 48, 152 (2012)
Simulation Visualization
1∗10− 21𝑆𝑒𝑐𝑜𝑛𝑑𝑠
Methods
Diagram flow of procedure.
Results.TDHF simulations and experimental data are similar.
Up to around 50% above the fusion barrier.
Fusion Barrier
50% above
TDHF not accurate at high energies.
Loveland et al. Phy. Rev. C 74, 044607 (2006)
Results.TDHF simulations and experimental data are similar.
Up to around 50% above the fusion barrier.
TDHF not accurate at high energies.
Loveland et al. Phy. Rev. C 74, 044607 (2006)
Hagino et al., Comput. Phys. Commm 123, 143 (1999)
More Results and Conclusions.TDHF is the BEST to simulate the fusion barrier.
More Results and Conclusions.
TDHF does the BEST at determining the interactive radius.
Interaction Radius
Conclusions
Conclusions
Loveland et al. Phy. Rev. C 74, 044607 (2006)
How do Time Dependent Hartree- Fock calculations compare with experimental results by Loveland et al. on the fusion cross section of 38S+208Pb ?
• Experimental data and TDHF Calculations agree.
• TDHF is able to simulate heavy nuclei reactions.
• TDHF accurately simulates reactions with unstable nuclei.
Acknowledgements
Mr. Steven Thomas
Dr. Zach Kohley and group
Dr. Aditya Wakhle
SROP personnel & students
NIH grant 5T34GM007639-34
THANK YOU FOR YOUR ATTENTION
Any Questions?