Web Knowledge Base Web Knowledge Base

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

?