Gil Pontecorvo turns 80

July 30, 2018 marks the 80th birthday of Gil Brunovich Pontecorvo, Advisor to the Directorate of the Dzhelepov Laboratory of Nuclear Problems.  The DLNP Directorate, colleagues, and friends heartily wish Gil Pontecorvo happy birthday, advances in his researches, good health, happiness, and inexhaustible optimism! Gil Pontecorvo has been working at the Laboratory of Nuclear Problems since 1962, and over that time he participated in quite a few scientific and methodological researches that yielded important physical results. He is one of the leading specialists in development and usage of streamer chambers.

Participants in the medical section of the Summer School on an excursion at the DLNP MTC

Today the young participants in the medical section of the Summer School scientific educational project visited the DLNP Medico-Technical Complex (MTC). Sergei Vasil’evich Shvidkii told the young visitors about the history of the MTC, proton therapy, and prospects for development of the Proton Radiotherapy Center in Dubna. At present, up to 100 patients a year are given proton treatment sessions 26–28 weeks long at the MTC. Dubna holds the leading position in precision proton radiotherapy in Russia because since 1999 the method of 3D conformal proton treatment in which the dose distribution matches the target shape to within millimetreshas been implemented and successfully used here to treat deep-seated tumours.

Evidence for existence of a new particle is found by DLNP scientists in the COMPASS experiment

The search for photoproduction of the exotic charmonium $X(3872)$ in the COMPASS experiment (CERN) has ended in an unexpected result. Though a signal that completely agrees in parameters with the expected one was found with a statistical significance of 4.1 σin the invariant mass spectrum of the final state, the detailed analysis of the decay kinematics of the observed particle entirely disagrees with the well-known $X(3872)$ decay kinematics. This unexpected observation allows an assumption that the observed signal might be from a new particle designated as $\widetilde{X}(3872)$, which is a partner particle for $X(3872)$ and has a similar mass and lifetime but differs from $X(3872)$ by the set of quantum numbers. The existence of this partner particle is predicted by some theoretical models that describe $X(3872)$ as a state of two quarks and two antiquarks tightly bound by the strong force (tetraquark). The results of the work are published in the Physics Letters B783 (2018) 334–340.

General laboratory seminar by M.V. Lyablin, 18.07.2018

    Displacement of collider beam focuses caused by various seismic sources was discussed.A method is proposed for calculating the beam focus displacement due to the passing seismic waves with allowance for the length of the area of beam preparation for collisions, frequency of the seismic wave, and its velocity dependence on the frequency.   

Guests from Italy visited the Memorial Study of Bruno Pontecorvo

Summer School scientific education project is a guest of DLNP

Congratulations to Petr Smolyansky on the successful defence of the candidate’s dissertation!

On 6 July 2018, at the session of the DLNP Dissertation Council Petr Igorevich Smolyansky defended the dissertation “Study of gallium arsenide pixel detectors based on the Timepix microcircuit” (speciality 01.04.01 “instruments and methods of experimental physics”)for getting the decree of the Candidate of Sciences in Physics and Mathematics.  We heartily congratulate Petr on the successful defence of the dissertation and wish him further success and creative achievements!  

General DLNP seminar by M. V. Lyablin on 04.07.2018

    At the seminar, consideration was given to advantages and drawbacks of methods for measuring coordinates of the laser beam center and determining the range and amount of laser beam displacements using the quadrant photoreceiver, CCD matrix, and dividing plates. 

General DLNP seminar by Nikolai Ilyich Rukhadze, 27 June 2018

  The results of the double beta decay investigations were reported. The investigations are carried out with the TGV-2 andObelix low-background HPGe spectrometers at the Modane underground laboratory (France) at a depth of 4800 m water equivalent. The main goal of the measurements with the 32-detector spectrometer TGV-2 is direct detection of the two-neutrino double electron capture in the 106Cd decay.

Jubilee seminar of Samoil Mikhelevich Bilenky, 20 June 2018

Today, on 20 June 2018, a scientific seminar was held at the JINR Scientists’ Club to celebrate the 90th birthday of Prof. S.M. Bilenky. The seminar was organized by the Dzhelepov Laboratory of Nuclear Problems and the Bogolyubov Laboratory of Theoretical Physics. See more photos here.  

General DLNP seminar by Yu. N. Uzikov, 20 June 2018

    An important result of the hadron programme at COSY (Jülich, Germany) is the isoscalar resonance with the mass of 2380 MeV and width of about 70 MeV observed by the WASA collaboration in the reactionpn→dπ0π0.

Ludmila Kolupaeva is one of the finalists of the poster session at the international conference Neutrino2018

Ludmila Kolupaeva became one of the finalists of the poster session at the international conference Neutrino2018 in Heidelberg. We hearlity congratulate Lyudmila and wish her further victories!