Fusion Cross Section of 38S+208Pb
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Transcript of Fusion Cross Section of 38S+208Pb
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Fusion Cross Section of 38S+208Pb
1 2 3
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BACKGROUND
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Atoms, Nuclei, Protons & Neutrons
The strong nuclear force is pronounced between nucleons found within any nuclei.
Nucleons:
• Protons
• Neutrons
http://content-calpoly-edu.s3.amazonaws.com/physics/1/images/other_pics/NuclearParticleBanner.png
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Addition of Nucleons
Neutron Proton2
216
38 – SSulfur
UNSTABL
E
https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Nucleus_drawing.svg/1024px-Nucleus_drawing.svg.png
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Field of Research
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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…
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Implications for Society andthe Physics Community
https://newscenter.lbl.gov/wp-content/uploads/sites/2/2010/10/Heidelberg-patient.jpg
http://i.dailymail.co.uk/i/pix/2014/10/16/1413458769593_wps_28_Fusion_Reactor_Image_by_M.jpg
http://www.peency.com/images/2014/10/18/21805-sn-1987a-supernova-2880x1800-space-wallpaper.jpg
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Research Question
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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 ?
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36S+208Pb 34S+208
Pb 32S+208Pb
38S+208Pb
STABLE
UNSTABLE
Loveland’s Experimental Data
Loveland et al. Phy. Rev. C 74, 044607 (2006)
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Tools and Methods.
KEEP CALMANDUSE
TIME DEPENDENTHARTREE – FOCK
THEORYCODE
Computer Simulations.
HPCC Supercomputer.
TDHF code.
C. Simenel, Eur. Phys. J A 48, 152 (2012)
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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)
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Simulation Visualization
1∗10− 21𝑆𝑒𝑐𝑜𝑛𝑑𝑠
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Methods
Diagram flow of procedure.
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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)
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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)
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More Results and Conclusions.TDHF is the BEST to simulate the fusion barrier.
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More Results and Conclusions.
TDHF does the BEST at determining the interactive radius.
Interaction Radius
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Conclusions
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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.
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Acknowledgements
Mr. Steven Thomas
Dr. Zach Kohley and group
Dr. Aditya Wakhle
SROP personnel & students
NIH grant 5T34GM007639-34
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THANK YOU FOR YOUR ATTENTION
Any Questions?