Alexander Karpov, JINR, Dubna NUCLEUS-2015, Peterhof, 03.06.15 What is “Knowledge base” Fusion-Fission-Evaporation analysis Web knowledge.

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Presentation transcript:

Alexander Karpov, JINR, Dubna NUCLEUS-2015, Peterhof, What is “Knowledge base” Fusion-Fission-Evaporation analysis Web knowledge base on low-energy nuclear physics JINR-SAR cooperation JINR-ARE cooperation

Nuclear Data Resources in the Internet  -Ray Spectra Radium Institute, St.-Petersburg CDFE MSU, Moscow Reaction Data Database Durham, UK The Isotop Explorer

Nuclear Data Resources in the Internet NNDC CDFE The Isotopes Project (LBNL) TUNL NN-Online NEA Data bank NACRE NDC JAEA

Computer Codes for Nuclear Data TALYS – software for the simulation of nuclear reactions EMPIRE – modular system of nuclear reaction codes for advanced modeling of nuclear reactions using various theoretical models NEA Data Bank Computer Program Services LISE++ – a tool for calculating the transmission and yields of fragments produced and collected in a spectrometer (more details in the next talk) FRESCO, CCFULL, GRAZING, EPAX, DWUCK, PACE, and many others

For the first time it becomes possible to study complicated nuclear dynamics just in the Internet! Have an Internet browser? May try! requires

NRV. Main menu

Databases: Nuclear Map

Nuclear Models: Fusion-fission-surviving

Fusion: Quantum channel-coupling model

Nuclear Models: Fusion-Surviving

Tool for analysis and prediction

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

SOON-COMING (1-2 years) possibilities of fusion-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)

Statistics of use of the Knowledge base Year Nuclear data Nr. of searches Computational codes Nr. of runs per year ~540 per day 1 every 160 sec! per year ~100 per day 1 every 15 min! The most intensively using countries except Russia (according to feedbacks and journal citations): USA, Germany, France, China, India, Italy, Poland

Prof. V. Zagrebaev Head of the project Dr. A. Denikin A. Alekseev Web programmer Dr. A. Karpov M. NaumenkoProf. V. SamarinV. Rachkov The Team Unique research instrument in Internet Everyone, Everywhere, Free Students…