1. NUCLEAR PHYSICS THEORY AT JINR
V. Voronov
The 72nd Board Meeting of the EPS Nuclear Physics Division
Dubna, September 26, 2016 1

3. Laboratory of Theoretical Physics, JINR
May 25, 1956

4. BLTP’s Scientific Policy Multidisciplinary research;
Development of research in Theoretical Physics
on the basis of Advanced Mathematics;
Multidisciplinary research;
Support of the JINR Experimental Programme;
Strengthening of the efficiency of scientific staff through
the interplay of Research and Education.
Nuclear
Theory
Fields and
Particles
Theory of
Condensed
Matter
Frontiers in
Fundamental Science
DIAS-TH
Modern Math.
Physics

5. : Themes and projects
Theory of Elementary Particles and Fields
Projects:
Standard Model and Its Extension,
QCD Parton Distributions for Modern and
Future Colliders,
Physics of Heavy and Exotic Hadrons,
Mixed Phase in Heavy-Ion Collisions.
Nuclear Theory, Nuclear Structure and Dynamics
Projects:
Nuclear Structure far from Stability Valley
Nucleus-Nucleus Collisions and Nuclear Properties atatat Low Energies
Exotic Few-Body Systems,
Nuclear Structure and Dynamics at the Relativistic Energies.
Theory of Condensed Matter and New Materials
Projects:
Physical properties of complex materials and nanostructures
Mathematical problems of many-particle systems
Modern Mathemtical Physics
Projects:
Quantum groups and integrable systems
Supersymmetry
Quantum gravity, cosmology and strings
Research and Education Project “Dubna International School of Theoretical Physics (DIAS-TH)”

6. Dubna International Advanced School of Theoretical Physics (DIAS-TH)
Training courses for students, graduates, and young scientists in the JINR Member States and other countries.
Looking for and supporting gifted young theorists in the JINR Member States.
Organization of schools of different scales in Dubna and coordination with similar schools.
Cooperation with the JINR University Center in training students and postgraduates as well as in organizing schools for students.
Publication of lectures with the use of modern electronic equipment.

7. AGREEMENTS BLTP – Romania (since XII ’03) BLTP – ICTP (since ’88)
Titeica-Markov Program
BLTP – APCTP, Pohang (since ’07)
BLTP – Bulgaria (since ’09)
Soloviev-Khristov Program
BLTP – ITP CAS, China (since VII ’10)
BLTP – IOP VAST, Vietnam (since VIII ’11)
BLTP – Physical Inst., NAS, Armenia (since ’09)
Smorodinsky - Ter-Antonyan Program
BLTP – IMP CAS, ((since VII ’15)
BLTP – ICTP (since ’88)
BLTP – Germany (since ’91)
Heisenberg-Landau Program
BLTP – INFN (since XII ’95)
6 month visits to Italy
BLTP – CERN-TH (since XII ’95)
3 month visits to CERN
BLTP – Poland (since XII ’98)
Bogoliubov-Infeld Program
BLTP – Czech Republic (since XII ’99)
Blokhintsev-Votruba Program 7

10. Low-Energy Dynamics and Nuclear System Properties
Projects:
Properties of Nuclei at the Border of Stability
Low-Energy Dynamics and Nuclear System Properties
Quantum Few-Body Systems
Processes with Nuclei at Relativistic Energies and
Extreme States of Matter 10

11. Age of BLTP Nuclear Theory Community Personnel

12. Structure of heaviest nuclei
N.Yu. Shirikova, A.V. Sushkov, R. V. Jolos, V.G.Kartavenko, V.O.Nesterenko,
L.A.Malov, G.G.Adamian, N.V.Antonenko, A.N.Bezbakh
α-decay chain of 12

15. β−decay half-lives of the neutron-rich N = 50 isotones
Results of the calculations without the tensor interaction (open triangles, circles, squares) and with the tensor interaction (filled triangles, circles, squares) are shown. The squares correspond to the half-lives calculated with inclusion of the phonon-phonon coupling, the triangles are the QRPA calculations. Results including the [1+i ⊗ 2+i' ]QRPA
configurations are denoted by the circles. Experimental data (filled diamonds).
Role of tensor interaction 16

16. Thermal effects on nuclear weak-interaction processes in supernovae

17. Production of superheavies at sub-barrier energies
Juhee Hong, G.G.Adamian, N.V.Antonenko, PRC 92, (2015)
The excitation functions in the 3 neutron channel are wider than those in the 4 and 5 neutron evaporation channels, their shapes strongly deviate from the Gaussian. Some superheavies with larger number of neutrons can be reached at sub-barrier energies.
The measured (symbols, PRC 77, (2008)) and calculated (lines) excitation functions for xn evaporation channels (x = 3–5). The black triangles at the energy axis indicate the excitation energy E∗CN = VB + Q of the CN.

18. PRODUCTION OF NEW SUPERHEAVY ISOTOPES IN CHARGED PARTICLE EVAPORATION CHANNELS J.Hong, G.Adamian, N.Antonenko, EPJ A (2016)
New isotopes of heaviest nuclei with Z= can be synthesized in 48Ca-induced actinide-based fusion reactions with emission of charged particles.
Evaporation of proton or alpha-particle from the CN in these reactions leads to the formation of nucleus with smaller Z but with a larger neutron excess:
48Ca+248Cm  (293)115+p2n, Ca+243Am (288)115+3n
In the SHN formed, an electron capture can occur by adding one more neutron to daughter nucleus.

19. The possibilities for producing neutron-rich isotopes 52,54,56,58Ca in the transfer reactions with rare-earth targets.
Phys. Rev. C 89 (2014) Phys. Rev. C 91 (2015)

23. A. V. Friesen, Yu. L. Kalinovsky, V. D
A. V. Friesen, Yu. L. Kalinovsky, V. D. Toneev, IJMP A 30, (2015)

24. Our (new) result In reaction: length of the pulse
A.I. Titov et al, Phys.Rev A 87 (2013) ; Phys. Rev. D 93 (2016)
In reaction:
For the first time it has been found that the short pulses “generates” high momentum components which produce a great amplifier effect for the multi-photon, sub-threshold events. Enhancement may reach many orders of magnitude depending on field intensity and the beam shape
Two parameter pulse shape function:“summarized Fermi (sF)”shape
Lukyanov et al.,’70~’80
length of the pulse
number of the circles in the pulse
Рождение е+е- пар при прохождении фотона через поляризованный очень короткий мощный лазеный импульс.
Вероятность определяется конкуренцией двух факторов: формой и длительностью импульса и нелинейной динамикой взаимодействия пары с мощным эл-маг полем. При слабом поле важно сильно осциллирующее поле в небольшой
Простр.-временной области – усиливает вероятность рождения на несколько порядков; при сильном поле – нелинейная мультифотонная динамика Брейта-Уилера, а длительность и форма импульса не важны.
Our (new)
result
probability/time (eV)
Former (plane wave) prediction
Sub-threshold region
Above-threshold region 25

25. 4He_3 Measurements: 26262626 Efimov Physics and Beyond
4He_3 Predictions:
E.A.Kolganova, A.K.Motovilov, W.Sandhas,
4He_3 Measurements:
[M.Kunitski M. et. al.Science 348 (2015) 551]
A: Dependence of the binding energies of the ground (GS) and first excited (1ST) states of the He trimer on the scattering length calculated by scaling the He-He potential.
B and C: Structure of the excited and ground states of 4He_3.
Future plans:
Search for Efimov resonances in three-body systems of other noble gas atoms;
Study of universal properties of few-body systems beyond the Thomas-Efimov effects. 26

26. Outlook
Further development of microscopic models for nuclear structure and reactions
Intensive studies of superheavy and exotic nuclei (structure, reactions…)
New methods for nuclear astrophysics
New models for relativistic heavy-ion collisions
Active support of experimental nuclear investigations at JINR (the SHE factory, NICA …)
Attraction of young researchers in nuclear theory 27

27. THANK YOU FOR ATTENTION!
WELCOME TO BOGOLIUBOV LABORATORY OF THEORETICAL PHYSICS!
THANK YOU FOR ATTENTION!

28. 22C is now the heaviest observed Borromean nucleus
S. N. Ershov et al.
Phys. Rev. C86, (2012); C90, (2014)
" Binding energy constraint on matter radius and soft dipole excitations of 22C "
22C is now the heaviest observed Borromean nucleus C r1 r2 x y
the nuclear three-body cluster model 20C(core)+2n
5.4 fm
4.5 fm
S2n<10 keV S2n~20-50 keV
K. Tanaka et al, PRL 104, (2010)
Red and blue lines present the calculated matter radius versus S2n at two available sets of parameters. The uncertainties of S2n at rm=5.4 and fm are marked.

29. PRC 91 (2015)

31. DUBNA
JINR
BLTP
Welcome!