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.
- Details
IBR-2 Status OFF
The operation of the IBR-2 reactor and access to its experimental instruments have been suspended until September 2023
Events
DNP Seminar, November 17 (Wednesday), 15:00, online
"Improved neutron lifetime measurement with UCNtau"
E.I. Sharapov
(Report on the work PRL, v.127, 162501,(13 Oct 2021))
In the new experiment , performed at LANL by the UCNtau Collaboration with their magnetic trap for ultracold neutrons, the Collaboration has achieved the most precise measurement of the neutron lifetime tau = 877,75 +- 0,34 s. In comparison with the previous experiment, the statistical and the systematic uncertainties have been reduced to values less than the above quoted level, approaching now the theoretical precisions of calculations in beta-decay within the Standard Model of elementary particles.
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DNP Seminar, November 9 (Thuesday), 11:00, online
"Ternary and quaternary fission studies from Cf-252 spontaneous fission using silicon pixel detectors Timepix"
Ahmadov G. S., Holik M., Kopatch Y. N., Berikov D. et. al
The emission probabilities and the energy distributions of particles emitted in the spontaneous ternary and quaternary fission of 252Cf were determined. To study these processes, an experimental setup (figure) was assembled, consisting of three silicon ∆E-E telescopes and a silicon detector. Thin detectors with an area of 10 × 10 mm2 and a thickness of 15 and 150 μm were used to measure ∆E, and Timepix silicon pixel detectors with an area of 14 × 14 mm2 and a thickness of 300 and 600 μm were used to measure E. We registered ternary and quaternary particles beginning from proton up to C from 252Cf spontaneous fission source with an activity of 350 kBq. The particle identification was performed with ∆E-E particle identification technique (figure). Preliminary results from collected data within 45 days of measurements were presented. From the measured partial-energy spectra of the particles, it was possible to estimate the total yields of the various particle types by extrapolation.
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TheXIGerman-RussianWeekoftheYoungResearcher, October 25, 2021, online
To participate register by link. 22 of October registered participants will receive link to connect to the specifiedat registration mail.
Detailed information about the event and press release can be found here
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Information about the AYSS conference, Frank and Shapiro scholarships.
In accordance with the JINR Order (clause 2) "On the Conduct of a Competition for Grants for Young Scientists and Specialists of JINR for 2022", the dates for the conference are November 30, December 1 and December 2. The conference will start at 10:00.
All applied applicants have to register on the website: https://indico.jinr.ru/event/2672/page/1210-about
All presentations will be held according to the schedule that will be available on the website. Time for performance: 7 min. for a report + 3 min. to questions for AYSS grant applicants, 10 min. for a report + 2 min. questions for scholarship applicants. An applicant applying for an AYSS grant and one of the scholarships simultaneously have to prepare a 10 min presentation.
The conference will be held online. All information about connection details will be sent by e-mail and posted on the Laboratory's website.
A competition for I.M.Frank and F.L.Shapiro scholarships for young scientists in 2022 is open
All applications for the scholarships (with a list of publications for the last 5 years and an annotation in Russian [1-2 pages] reflecting the applicant’s personal contribution to this research) should be submitted to the FLNP Scientific Secretary (room 76, bldg.42) no later than November 25 (10:00). Please, specify the section to which the application is submitted (in the annotation). A recommendation letter from the Head of the group or sector should be provided as well. All documents should also be sent in electronic format to: This email address is being protected from spambots. You need JavaScript enabled to view it.
Five I.M.Frank scholarships are awarded annually in the following research directions:
- investigation of condensed matter properties by neutron scattering methods;
- neutron nuclear physics;
- scientific and methodological developments for neutron research;
- development of basic facilities.
Three F.L.Shapiro scholarships are awarded annually in the following research directions:
- UCN physics;
- polarized neutrons;
- neutron spectroscopy;
- methodological support of neutron physics experiments.
The scholarship is awarded for a period of 1 year. The age of the scholarship applicant should be under 35 years (as of December 31 of the current year). The amount of the scholarship and the number of scholarships for each section can be changed by a joint decision of the FLNP Directorate and the jury. The scholarship cannot be awarded to the same person two years in a row.
Information on the planned activities at the IBR-2 reactor for 2021-2023
After the completion of repair work to eliminate the leakage of sodium coolant in the air cooled heat exchangers (АНЕ) of loop "В" of the 2nd cooling circuit of the IВR-2 reactor, which took place in 2018, the FLNP Directorate has taken а decision to schedule the replacement of two operating АНЕs with new ones for 2022 because of their long service life (more than 40 years) and а high risk of repetition of sodium leakage in the АНЕ tube bundle assembly. Under the agreement with the specialized organization, at the end of April 2022, new АНЕs will be delivered to JINR.
In October 2021, another localized sodium leakage was detected in the АНЕ tube bundle assembly of loop "В", which did not result in the violation of established threshold limits and conditions of the safe operation of the reactor. In accordance with the current operating regulations, the IВR-2 reactor was temporarily shut down. The administration of IВR-2 and FLNP took а decision to prepare а Plan of Activities for the replacement of two АНЕs. Below are the main points of this plan.
Provisional dates and content of activities
|
№ |
Activities |
Date of performance |
|
1. |
The IВR-2 reactor shutdown |
October 2021 |
|
2. |
Preparation and carrying out repairs of existing АНЕs (repairs are necessary to ensure the circulation of liquid sodium through the reactor core before the start of work on replacing the existing AHEs with new ones.) |
April 2022 |
|
3. |
Replacement of the existing АНЕs with new ones |
September 2022 |
|
4. |
Preparation of documentation on the replacement of АНЕs and а package of documents for obtaining а license to operate the IВR-2 reactor. Submission of documents to Rostechnadzor. |
October 2022 |
|
5. |
Expert examination of the set of documents for obtaining the Rostechnadzor license, consideration of the results of the examination, the decision of Rostechnadzor to issue а license for the right to operate the IВR-2 reactor * |
June 2023 |
|
6. |
Obtaining а license from Rostechnadzor for the right to operate the IВR-2 reactor* |
July 2023 |
|
7. |
Resumption of operation of the IВR-2 reactor for physics experiments |
September 2023 |
* - The dates are indicated taking into account the procedure established by the Administrative Regulations for the provision of state services by Rostechnadzor for licensing activities in the field of atomic energy use.
RAD 2022 conference
10th Jubilee International Conference on Radiation in various fields of research (RAD Conference) will be organized next year from 13.06. - 17.06.2022. (Spring Edition) and from 25.07.-29.07.2022.
www.rad2021.rad-conference.org - conference webpage
The operation of the IBR-2 reactor and access to its experimental instruments have been suspended for at least one year
Please be informed that for technical reasons, the operation of the IBR-2 reactor and access to its experimental instruments have been suspended for at least one year. Unfortunately, this means the cancellation of the proposals submitted in the recent call. Future Calls for Proposals are postponed until further notice.