Alexander Karpov, JINR, Dubna NUCLEUS-2015, Peterhof, 03.06.15 What is “Knowledge base”...
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Transcript of Alexander Karpov, JINR, Dubna NUCLEUS-2015, Peterhof, 03.06.15 What is “Knowledge base”...
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Alexander Karpov, JINR, Dubna
NUCLEUS-2015, Peterhof, 03.06.15
• What is “Knowledge base”• Fusion-Fission-Evaporation analysis
http://nrv.jinr.ru
Web knowledge base on low-energy nuclear physics
JINR-SAR cooperationJINR-ARE cooperation
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Nuclear Data Resources in the InternetNuclear Data Resources in the Internet
-Ray Spectra Radium Institute,
St.-Petersburg
CDFE MSU, Moscow
Reaction Data Database Durham, UK
The Isotop Explorer
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Nuclear Data Resources in the Internet
• NNDC http://www.nndc.bnl.gov/index.jsp
• CDFE http://cdfe.sinp.msu.ru/index.en.html
• The Isotopes Project (LBNL) http://ie.lbl.gov/
• TUNL http://www.tunl.duke.edu/nucldata/
• NN-Online http://nn-online.org/
• NEA Data bank http://www.oecd-nea.org/dbprog/
• NACRE http://pntpm.ulb.ac.be/Nacre/
• NDC JAEA http://wwwndc.jaea.go.jp/
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Computer Codes for Nuclear DataComputer Codes for Nuclear Data
• TALYS – software for the simulation of nuclear reactions http://www.talys.eu/
• EMPIRE – modular system of nuclear reaction codes for advanced modeling of nuclear reactions using various theoretical models http://www.nndc.bnl.gov/empire219/
• NEA Data Bank Computer Program Services http://www.oecd-nea.org/dbprog/
• LISE++ – a tool for calculating the transmission and yields of fragments produced and collected in a spectrometer (more details in the next talk) http://lise.nscl.msu.edu/lise.html
• FRESCO, CCFULL, GRAZING, EPAX, DWUCK, PACE, and many others
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http://nrv.jinr.ru
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http://nrv.jinr.ru
For the first time it becomes possible to study complicated nuclear dynamics just in the
Internet!
Have an Internet browser? May try!
requires
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NRV. Main menu
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Databases: Nuclear Map
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Nuclear Models: Fusion-fission-surviving
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Fusion: Quantum channel-coupling model
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http://nrv.jinr.ru
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Nuclear Models: Fusion-Surviving
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Tool for analysis and prediction
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PRESENT possibilities of fusion-evaporation codes
a) Statistical code alone•Level densities (energy dependence)•Decay widths (neutron, proton, alpha, gamma, fission)•Survival probabilities (Monte-Carlo and Multifold integration)
b) Fusion codes alone•Fusion cross section•Barrier distribution•Partial fusion cross section
c) Combination of Fusion and Decay codes•Fission cross section•Total survival cross section•Evaporation cross sections for any possible channel•Isotopic evaporation cross sections•Account for CN formation probability (for cold fusion)•Fission-fragment mass-charge distributions
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SOON-COMING (1-2 years) possibilities offusion-evaporation codes
Combination of Fusion and Decay codes
•Account for fission transient effects (fission delay time)
•Average multiplicities of pre- (from CN) and post- (from fragments) scission evaporated particles
•Energy spectra of evaporated particles (survived events, before and after scission of fissioning nuclei)
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Statistics of use of the Knowledge base
YearNuclear data
Nr. of searches
Computational codes
Nr. of runs
2011 17 000 20 000
2012 36 000 21 000
2013 197 000 32 000
2014
199 000 per year
~540 per day
1 every 160 sec!
36 000 per year
~100 per day
1 every 15 min!
http://nrv.jinr.ru
The most intensively using countries except Russia(according to feedbacks and journal citations):
USA, Germany, France, China, India, Italy, Poland
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Prof. V. Zagrebaev Head of the project
Dr. A. DenikinA. Alekseev
Web programmerDr. A. Karpov
M. NaumenkoProf. V. SamarinV. Rachkov
http://nrv.jinr.ru
The Team
Unique research instrument in Internet
Everyone, Everywhere, Free
Students…