Frank Laboratory of Neutron Physics is one of the laboratories of the Joint Institute for Nuclear Research (Dubna, Russia) that investigates the neutron as an elementary particle using various instruments, and employs the neutron as an instrument to investigate the structure and dynamics of condensed matter, including crystals and nanosystems, functional materials, complex liquids and polymers, rocks, etc. so that our findings could find application in molecular biology and pharmacology, engineering diagnostics and in other fields of science and technology.
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Events
DNP Seminar, December 9 (Wednesday), 11:00, online
"Non-stationary neutron diffraction on surface acoustic wave"
G.V. Kulin
Unlike the usual diffraction by a stationary object, neutron diffraction on a running wave is an essentially non-stationary process resulting in transfer of energy to the neutron. Here is the wave frequency, is the Planck constant, and n is an integer.
The report will briefly give the theory of neutron diffraction on traveling and standing SAWs and present the results of experiments on the study of neutron diffraction on ultrasonic waves moving both along and against the direction of the neutron wave, as well as on a standing SAW. In one of them, measurements were conducted with a fixed neutron wavelength and a variable incident angle. The second experiment was done at a fixed incident angle in TOF mode for a wide range of wavelengths.
SAW arise due to periodical oscillation of the near-surface layer of matter that moves with alternative velocity and acceleration. For a SAW with a frequency of tens MHz this acceleration reaches a value of 107g. Since the theory of neutron diffraction by a surface wave is based on the concept of the effective potential of matter, comparison of the experimental data with the calculation is a sensitive test of the validity of this concept in the case of large accelerations.
DNP Seminar, November 25 (Wednesday), 11:00, online
"Neutron Activation Analysis of the samples of molluscs: the features and application"
Nekhoroshkov P. S., Bezuidenhout J., Frontasyeva M. V., Zinicovscaia I. I., Yushin N. S., Vergel K. N., Petrik L.
During several years, the neutron activation analysis at the REGATA facility of the IBR-2 was successfully used for estimation of concentrations of macro- and microelements in the samples of mussels and oysters from coastal zone of the South Africa. The ability of the method to determine the element-markers of anthropogenic (Zn, As and Br) and terrigenous component (Sc, Ti, Th) in the soft tissue and shells of molluscs in complex biomonitoring studies was shown. In addition, the differences of accumulation of elements by alien species and indigenous species were found.
The human health risks in mussels consumption (based on guidelines of WHO JECFA, IRIS EPA US) were assessed for such elements as Al, Cr, Mn, Fe, Co, Ni, Zn, As, Se, Br, Sr, Sb, I and U for the first time for 8 selected coastal zones of South Africa region. At the levels of consumption in more than 300 g per capita per week such elements as Al, Cr, Fe, Co, Zn, As and I revealed the high risks for human health in the zone of Cape Town (St. 5, Hout Bay) and Durban (St. 8).
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FLNP Scientific and Technical Council, November 19, 2020 (Thursday), 11:00, remotely
Meeting agenda:
- Proposal for the opening of a new project "Modernization of the EG-5 accelerator and development of its experimental infrastructure".
Speaker: Doroshkevich A.S.
- Elections for positions:
- Head of the Raman Spectroscopy Sector, FLNP.
Candidate for the position: Arzumanyan G.M.
- Group leader, DSC FLNP.
Candidate for the position: Bulavin M.V.
- Group leader, DSC FLNP.
Candidate for the position: Chernikov A.N.
- Group leader, DSC FLNP.
Candidate for the position: Altynov A.V.
Read more ...LIT Seminar, November 26, 2020 (Thursday), 15:00, remotely
"Parallelizing multiple precision Taylor series method for integrating the Lorenz system"
I. Hristov1, R. Hristova1, S. Dimova1, P. Armyanov1, N. Shegunov1,Puzynin2, T. Puzynina2, Z. Sharipov2, Z.Tukhliev2
1Sofia University, Faculty of Mathematics and Informatics, Bulgaria
2JINR, Laboratory of Information Technologies, Dubna, Russia
Read more ...DNP Seminar, November 18 (Wednesday), 11:00, online
"Search of criteria for determination of archaeological ceramics places of origin based on the data of the mass multielement NAA and statistical analysis of obtained results"
Yu. Dmitriev, W. Badavy, V.S. Smirnova, O.E. Chepurchenko, Yu.G. Filina, M.V. Bulavin
The study of ceramics is one of the most important directions in modern Russian archeology, as it makes up to 90% of the artifacts found during excavations. Until now, comparatively-descriptive methods have been mainly used to study it. Instrumental physicochemical methods are also used, however, researchers most often solve rather narrow tasks with their help. Despite the constant accumulation of data, their systematization is practically not carried out and reliable criteria, the application of which would allow to reliably establish the places of origin of ancient ceramics have not been found until now.
The purpose of this study is to determine the chemical (elemental) composition of different genesis ceramics, to accumulate a database for different regions and the results systematization.
In this regard, several batches of samples were obtained from the Institute of Archeology of the Russian Academy of Sciences. They were studied by neutron activation analysis and X-ray fluorescence analysis, and statistical processing of the results was carried various methods. The seminar will present the results of the work done.
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News
Schedule of reports for I.M.Frank and F.L.Shapiro scholarships, as well as Youth Grants for JINR young scientists and specialists
You can connect to the online conference using the link
Meeting number: 817 3927 9203
Password: 691846
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ATTENTION! A competition for I.M.Frank and F.L.Shapiro scholarships for young scientists in 2021 is announced.
Scholarship applicants are supposed to submit applications to the FLNP Scientific Secretary (room 76 of the FLNP laboratory building), as well as to attach a list of publications for the last 5 years and an abstract in Russian (1-2 pages) reflecting personal contribution to these publications. The deadline is November 23 (10:00). The abstract must indicate the section for which the application is submitted. A recommendation of the group or sector leader should be attached to the documents as well. All documents should also be sent by email to the address: This email address is being protected from spambots. You need JavaScript enabled to view it.
5 Frank scholarships are awarded annually in the following fields of research:
- Study of properties of the condensed matter by neutron scattering methods;
- Neutron nuclear physics;
- Scientific and methodological developments for neutron research;
- Development of basic facilities.
3 Shapiro scholarships are awarded annually in the following fields of research:
- Physics of ultracold neutrons;
- Polarized neutrons;
- Neutron spectroscopy;
- Methodological support of experiments in neutron physics.
A scholarship is awarded for one year. The age of the scholarship holder should not exceed 35 years (as of December 31 of the current year). The size of the scholarship and the number of scholarships for each of the sections can be revised by a joint decision of the FLNP Directorate and the jury. The scholarship is not awarded to the same person for two consecutive years.
The “Lectures on the theory of condensed state” book by V.L. Aksenov and T.V. Tropin was published
The book is based on the lectures, given by the authors at the Physics Department of the Lomonosov Moscow State University (Neutronography chair). A brief description of the theoretical methods, based on the two-time correlation functions and their extensions, is given. These methods are further applied to study the basic models of theory of the collective excitations in crystals and simple liquids. The actual topics of the physics of soft matter, where theoretical methods of the physics of condensed state play a major role, are considered.
Information about the International Conference on Condensed Matter Research at the IBR-2 reactor (CMR@IBR-2), October 12-16, 2020October 12-16, 2020
T.I. Ivankina, Scientific Secretary of CMR@IBR-2
The International Conference "Condensed Matter Research at the IBR-2 Reactor" was organized and held from October 12 to 16, 2020 by the Frank Laboratory of Neutron Physics of the Joint Institute for Nuclear Research, Dubna. Due to the unfavorable epidemiological situation with the COVID-19 pandemic, the Conference was moved online and conducted in the video conference format.
The videoconference helped bring together more than 200 scientists from 27 countries from almost all continents from Australia to South America around their monitors. Holding the Conference online, on the one hand, had disadvantages because of the lack of live communication, but on the other hand, it made it possible to significantly increase the total number and geography of its participants. In addition to the traditional participation of researchers from countries that have been actively cooperating with JINR for many years – Azerbaijan, Bulgaria, Poland, Romania, Moldova, Czech Republic, Slovak Republic, Hungary, Germany, Belarus, Ukraine and Russia, the geography of participants has significantly expanded to include researchers from Argentina, Australia, India, Jordan, Spain, China, Sweden, South Korea and other countries.
The aim of the already traditional conferences on condensed matter research at the IBR-2 reactor is to discuss the obtained experimental results, promising areas of research and development of experimental instruments at the IBR-2 reactor.
During 5 days of the Conference, the participants presented more than 60 plenary reports and 85 posters. The Organizing Committee of the Conference managed to attract a number of world-famous specialists in the field of condensed matter physics, chemistry, biophysics, materials science, engineering and Earth sciences, which determined the high scientific level of reports and a wide variety of research areas in interdisciplinary natural sciences. The thematic reports were also devoted to the improvement of neutron scattering techniques, the development of setups for neutron investigations and their components, including neutron detectors.
At the Conference, special attention was paid to the concept of a new neutron source at FLNP JINR, which will replace the IBR-2 reactor upon the expiration of its service life within the next 20 years. Information was presented on the current progress in developing the concept of a new neutron source and a long-term work plan for 15 years.
The participants of the Conference noted the high level of organization of the event, its fruitful nature and the fact that it contributed to attracting both representatives of the international neutron community and specialists from various fields of knowledge to the implementation of the scientific research program at the IBR-2 reactor, discussion of promising scientific directions, and development of research infrastructure.
Today marks the 112th anniversary of the birth of the Nobel Prize laureate in physics, Academician of the USSR Academy of Sciences Ilya M. Frank
Today marks the 112th anniversary of the birth of the Nobel Prize laureate in physics, Academician of the USSR Academy of Sciences Ilya M. Frank. He made a huge contribution to the development of several areas of theoretical and experimental physics. Being the organizer of the Laboratory of Neutron Physics in JINR, together with F.L. Shapiro, he suggested and outlined the directions for its future research program and supervised the development and construction of the LNP basic facilities – IBR, IBR-30 and IBR-2 reactors.
On the birthday of Ilya Mikhailovich, the FLNP Director V.N. Shvetsov laid flowers at his monument.
