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Web Knowledge Baseon Low Energy Nuclear Physics
Web Knowledge Baseon Low Energy Nuclear Physics
http://nrv.jinr.ru/nrv/http://nrv.jinr.ru/nrv/
Alexander Karpov, JINR, Dubna
European School on Exotic Beams,
30.08.13
•How to live without NRV? (Motivation)•How it works•Demonstrations…
Everybody time to time does the following:Everybody time to time does the following:
Search for available experimental data in the databases
Processing and drawing these data
Use some graphics packages
Analysis of the experimental data
Finding appropriate theoretical model
Preparation of input data and run the code
Processing of the obtained results
It requires time, resources and experience
Nuclear Data Resources in the InternetNuclear Data Resources in the Internet
-Ray Spectra
Radium Institute,St.-Petersburg
CDFE MSU, Moscow
Reaction Data DatabaseDurham, UK
The Isotop Explorer
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/
• NRV http://nrv.jinr.ru/nrv/
Computer 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 Serviceshttp://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
Difficulties
The databases provide detailed information on their subject only. In order to obtain complete data user needs to visit few databases.
An additional software on local PC is required in order to process the data.
Computer codes have to be downloaded and installed, some of them have complicated interface, non-advanced user should spend significant time in order to run these programs.
Most of the codes are not integrated with databases.
Experimental data on specific nuclide
Experimental data on nuclear reactions
1001100130010000 209Pb(1H,2H)208Pb Elab=4180.00 MeV91.000 0.000 2.000
35 10.1000-39.9000 1.5000 1.5000 0.0000 0.0000 0.0000 0.0000
4180.000209.0000 82.0000 1.0000 1.0000 7.2341 1.0000 0.0000 9.0000 0.00001.0000 -54.000 7.3291 0.6470 0.0000 0.0000 0.0000 0.0000 0.0000 0.00001.0000 0.000 0.0000 0.0000 0.0000 -1.4220 7.3291 0.6470 0.0000 0.0000
-2.0000 0.000 0.0000 0.0000 0.0000 40.0000 7.4062 0.6270 0.0000 0.0000-1.7119208.0000 82.0000 2.0000 1.0000 6.1135 1.0000 0.0000 0.0000 0.00001.0000 -95.801 5.4081 0.7940 0.0000 0.0000 0.0000 0.0000 0.0000 0.00001.0000 0.000 0.0000 0.0000 0.0000 -2.3480 6.2075 0.2620 0.0000 0.0000
-2.0000 0.000 0.0000 0.0000 0.0000 40.8800 6.3956 0.8980 0.0000 0.0000-3.9360 1.0000 0.0000208.0000 82.0000 0.1688 1.0000 0.0000 0.0000 0.0000-1.0000 -49.420 1.2320 0.6500 0.0000 0.0000 0.0000 0.0000 0.0000 0.00001.0000 4.0000 9.0000 1.0000 1.0000 0.0000 0.0000
-2.2246 1.0000 0.0000 1.0000 1.0000 1.0000 1.0000 0.0000 0.0000 0.0000-10.0000 -60.967 1.6500 0.6500 0.0000 0.0000 0.0000 0.0000 0.0000 0.00000.0000 0.0000 1.0000 1.0000 1.0000 0.0000 0.0000
9
Input for DWUCK5
SolutionSolution
Combination of the databases on nuclear properties and experimental
cross sections of nuclear reactions along with computer codes of theoretical models
in a unique system which we name
the Knowledge Base on low energy nuclear physics
We named this specific software the
“Nuclear Reactions Video” (NRV)
Why the Web Knowledge Base?Why the Web Knowledge Base?
• 1989-1994:
• 1995-1997:
• 1998:
MS-DOS
(+): graphical display, C++
(-): drivers ? databases ? menu and windows ?
Windows
(+): object coding, ...
(-): UNIX ? LINUX ? accessibility? upgrade ?
Decision on developing a Web version
(+): independence of anything,
accessibility for everyone,
unlimited number of users,
no problems with update and filling
Features of the NRV knowledge baseFeatures of the NRV knowledge base
• Databases (nuclear properties and cross sections)
• Computing Codes (OM, CC, DWBA, …)
• Free access for remote user (web-server based)
• Multi-user architecture
• User-friendly interface
• Hypertext and Graphical representation of results
• Processing the data and the results obtained
• Everything is downloadable ( text & graphics )
1. Processing the exp. data1. Processing the exp. data 1. Available databases2. Publications
DatabasesDatabases2. Nuclear Models2. Nuclear Models
3. Nuclear Dynamics3. Nuclear Dynamics
Shell model , b – decays Fission, SF
Elastic scattering (Optical and Classical models) Inelastic scattering (DWBA, CC, DIC) Transfer reactions (DWBA, GRAZING,…) Break-Up (DWBA, CC, Classical model) Fusion (CC, Langevin equation, Empirical model) Evaporation residues Decay of excited nuclei (Statistical model) Driving potential Kinematics (2-body, 3-body, Q-calculator)
1. Properties of nuclides1. Properties of nuclides
2. Cross sections of nuclear reactions
2. Cross sections of nuclear reactions
Spin, Parity, Half-life, Decay modes Mass, Q-values, Excited states Radius, Deformation …
Elastic Scattering Heavy-Ion Fusion Evaporation Residues…
NRV-serverhttp://nrv.jinr.ru/nrv/
NRV-serverhttp://nrv.jinr.ru/nrv/
MySQL, Java-Script, PHP
Visualization of all the data Adaptation of the data
Computing Codes
Computing Codes
C++, Java,Fortran
Remote user
How it worksHow it works
DatabasesDatabasesComputing Codes
Special codes for management, representation and handling of obtained dataSpecial codes for management, representation and handling of obtained data
Web-dialogs of user’s queriesWeb-dialogs of user’s queries
Nuclear modelsNuclear models
Models of nuclear dynamics
Models of nuclear dynamics
Experimental data on nuclear properties
and nuclear reactions
Experimental data on nuclear properties
and nuclear reactions
User queriesUser queriesS
yste
m r
ep
lyS
yste
m r
ep
ly
NRV Web-ServerNRV Web-Server
C++, Java, Fortran MySQL
HTML, PHP, JavaHTML, PHP, Java
Nuclear MapNuclear Map
Include all available data on properties of overall nuclei
Spin, Parity, Half-life, Decay modesMass, Q-values, Excited statesRadius, Deformations, …
Show data on each nuclide on one screen in hypertext and graphics representation
Compare the properties of different nuclei
(Systematics)
Experimental Data on Heavy Ions Fusion Cross sections
Experimental Data on Evaporation Residues Cross sections
Experimental Data on Elastic scattering Cross sections
User may analyze experimental data on fusion, elastic scattering or evaporation residue formation reactions
within available theoretical model (e.g. Coupled Channels, Optical model, Statistical Model, ...)
Nuclear Reactions DataNuclear Reactions Data
Digitized excitation functions of more than 1500 nuclear reactionsSearch capabilitiesShort description of the experimental data (authors, Ref., details of
experiment, …)Text and Graphical representation“Comparison” engine Downloading (ASCII text) and export (GIF, JPEG, PDF, …)
Digitized excitation functions of about 150 nuclear reactions All others features
Digitized excitation functions of about 800 nuclear reactionsAll others features
Fusion of nuclei
Other degrees of freedom
48Ca + 208Pb
1
2
34
5V12
V23
j0
j1 j2 j3 j4j5
Transparency of multi-dimensional potential barrier and fusion cross-section:
Channel coupling method
For example, excitation of rotational degrees of freedom
Channel coupling method
Channel coupling method
1. Vibration states:
22
, ,2,
1 1
2 2i i i
i i
h CD
12( )n
2 /2( ) ( )C e H
2. Rotational states:
2 2
,
ˆ
2i
i
i
Ih
2
( 1)2 i
I I
1. Partial decomposition of total wave function
2. Decomposition over internal states
Coupling matrix
Boundary condition
, ,( ) ~ ( )l v fus v l vy r R ik y r
EvR fus CN EvRl l l
l
P P fiss fus CN fissl l l
l
P P
fus fusl
l
fus 2( ) ( )l
lE T Ek
*EvR
totn
n pl
E B
P
fiss EvR1l lP P
tot fissn p
Nuclear Dynamics: Fusion-Decay
Formation of final products in fusion of heavy ions. Evaporation residue or fission
Fusion of heavy ions (capture cross section). QCC or ECC model
De-excitation process. Statistical model
~1CNP
Formation of compound nucleus.
for fusion of light and medium mass nuclei (no quasifission)
Nuclear Reaction Video
http://nrv.jinr.ru/nrv/
Nuclear Reaction Video
http://nrv.jinr.ru/nrv/
People involved in the project:
Prof. V. Zagrebaev Head of the NRV project
Dr. A. Denikin
A. Alekseev
Dr. A. Karpov M. Naumenko
Prof. V. Samarin
V. Rachkov
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