The yield of gamma-quanta from nuclear fusion reactions proceeding from various spin states of muonic molecules ptμ and pdμ has been measured. The work was performed on the “Triton” facility at DLNP JINR using a specially designed liquid-tritium target. For the first time, channels of the fusion reaction with the yield of double γ-quanta were observed: ptμ → 4Heμ + γ + γ, pdμ → 3Heμ + γ + γ. The data obtained for the yield of single γ-quanta in the channel of the fusion reaction ptμ → 4Heμ + γ is consistent with earlier research. The partial coefficient of sticking of a muon to a helium nucleus was determined experimentally in a channel of pt- and pd-fusion reactions with the yield of single γ-quantum.

We briefly review the contributions of A. A. Logunov to understanding the problems of general relativity and gravity with special attention to the issue of the possibility of a catastrophic stellar collapse forming a “black hole.”

scientist and President of the Russian Academy of SciencesÐ turned 70 on January 23, 2016. V E Fortov has made a major contribution to the physics of extreme states of matter and high energy densities, nonideal plasmas, shock and detonation waves, thermophysics, chemical physics, space research, and energetics, as well as several other realms of physics and technology. V E Fortov was born into the family of air force engineerlieutenant colonel Evgenii Viktorovich and history schoolteacher Galina Ivanovna in the town of Noginsk, Moscow Region. Vladimir's childhood and school years were spent near a military airfield, which could not help having an influence on the course of his life. Upon graduation from school in 1962, he entered the Aerophysics and Space Research Department of the Moscow Institute of Physics and Technology (MIPT), where he engaged in research under the supervision of VM Ievlev, a correspondingmember of the USSRAcademy of Sciences, even in his second year atMIPT. In 1968, V E Fortov graduated from the institute with distinction in Thermodynamics and Aerodynamics and became a post-graduate student of MIPT. He defended his thesis, entitled ``Thermophysics of Nuclear Rocket Engines,'' in 1971, ahead of schedule. A fortuitous meeting (or maybe the decree of destiny?) with academician Ya B Zel'dovich suddenly changed the life of the young scientist. Yakov Borisovich witnessed V E Fortov's report to a scientific conference and recommended him to Nobel Laureate NN Semenov, and, instead of going to the Far East, where he had been placed in a job, Vladimir Fortov started working in the Chernogolovka Branch of the Institute of Chemical Physics of the USSR Academy of Sciences. And so, withYaBZel'dovich's magic touch, Vladimir Evgen'evich engaged in research in the area of nonideal plasma physics and the thermophysical properties of extreme states of matter beginning in 1971. The results of this research formed the basis for his doctoral thesis, ``Nonideal plasma investigations using dynamic methods,'' which he defended in 1976, only five years after the commencement of his research. This subject area has been the focus of Fortov's attention until the present time: his monograph,Extreme States ofMatter on Earth and in the Cosmos (Berlin: Springer, 2011), was published in ``The Frontiers Collection'' book series to become a resource book for researchers in this area. Just the other day, his book Extreme States of Matter: High Energy Density Physics came out (Berlin: Springer, 2016). In parallel with plasma research, V E Fortov is deeply involved in studies of the mechanics of deformation and damage to materials exposed to high pressures, temperatures, and high deformation rates. Beginning in the 1980s, he supervised experimental and theoretical research into the mechanical properties of materials, damaging elements, barriers, and structures of special hardware. The expertise acquired in the course of studies of a highvelocity impact was in demand in the early 1980s, when a team of scientists headed by academician R Z Sagdeev started implementing the Vega International Space Program aimed at studying Halley's comet. The protection of the Vega spacecraft from meteorites and the system of dust impact analyzers fulfilled their task, and the computer codes employed in this case were later adapted for studying the problem of asteroid hazards. In particular, early in 1994, a group supervised by Fortov made a detailed prediction of the possible observable effects of an extraordinary space eventÐ the collision of Shoemaker±Levy comet with Jupiter in July 1994. The data of subsequent observations carried out by many laboratories in the world confirmed the high accuracy of these predictions. Similar work was performed in 2005 in connection with the Deep Impact ProjectÐa space experiment in which pioneering observations were made of a highvelocity collision of a metal striker with the nucleus of the 9P/Tempel comet. The successful solution to many scientific problems was facilitated by VEFortov's active cooperation with the General Physics Institute (GPI) and the Institute for High Uspekhi Fizicheskikh Nauk 186 (1) 109 ± 110 (2016) DOI: 10.3367/UFNr.0186.201601h.0109 Translated by M V Tsaplina PERSONALIA PACS number: 01.60.+q

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We show that under gravitational contraction of a spherical body, its internal energy increases infinitely as the body radius approaches GM/c 2 , which leads to a negative mass defect and unavoidably to an explosion process with ejection of part of the body mass because the spherical compression is unstable. This conclusion follows exactly from the general theory of relativity in harmonic coordinates.

Under the Spell of Landau, pp. 123-153 (2013) No AccessON THE PATH TOWARDS UNIVERSAL WEAK INTERACTIONS. S. GERSHTEINS. S. GERSHTEINInstitute for High Energy Physics, Protvino, 142281 Moscow Region, Russiahttps://doi.org/10.1142/9789814436571_0009Cited by:0 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: I will always remember my first meeting with YaB . In the autumn of 1951, after my graduation from Moscow State University, I ended up as a teacher of physics and mathematics in a high school in a village called Belousovo in the Kaluga Region, 105 km from Moscow. Sitting in the evenings at dinner with the old peasant woman who kindly took care of me, and in whose izba (loghouse) I lived, I looked at my university notes and, listening to the rain beating on the window, beyond which was pitch darkness, I consciously bade farewell to the scientific activity for which I had prepared at university. Originally published in Russian in Yakov Borisovich Zeldovich, Eds. S.S. Gershtein and R. A. Syunyaev, (Moscow, Fizmatlit, 1993; Second edition, 2008). A slightly abbreviated English edition is Zeldovich. Reminiscences, Ed. R. A. Syunyaev, (Chapman & Hall/CRC, 2004). Translated from Russian by Denise Gabuzda. FiguresReferencesRelatedDetails Under the Spell of LandauMetrics History PDF download

Under the Spell of Landau, pp. 30-51 (2013) No AccessLANDAU AS I KNEW HIMS. S. GERSHTEINS. S. GERSHTEINInstitute for High Energy Physics, Protvino, 142281 Moscow Region, Russiahttps://doi.org/10.1142/9789814436571_0002Cited by:0 (Source: Crossref) PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: The following sections are included: An "Ardent Communist" Landau as I Knew Him References This is the second part of the paper published in Priroda, 2008, Issue 1, p. 15. Translated from Russian by James Manteith. For the first part see p. 451. FiguresReferencesRelatedDetails Recommended Under the Spell of Landau Metrics History PDF download

Памяти Юрия Владимировича Гапонова, Абов Ю.Г., Велихов Е.П., Герштейн С.С., Денисов С.П., Домогацкий Г.В., Коршенинников А.А., Матвеев В.А., Оганесян Ю.Ц., Панченко В.Я., Ряжская О.Г., Рубаков В.А., Сисакян А.Н.

In the framework of the relativistic theory of gravity, we establish the absence of gravitational radiation from a nonstatic spherically symmetric source.

We demonstrate that because of the causality condition, gravitational waves have no unphysical “ghost” states in the relativistic theory of gravity with the graviton having a rest mass.