Two-proton radioactivity and three-body decay. III. Integral formulae for decay widths in a simplified semianalytical approach

Three-body decays of resonant states are studied using integral formulae for decay widths. Theoretical approach with a simplified Hamiltonian allows semianalytical treatment of the problem. The model is applied to decays of the first excited $3/2^{-}$ state of $^{17}$Ne and the $3/2^{-}$ ground state of $^{45}$Fe. The convergence of three-body hyperspherical model calculations to the exact result for widths and energy distributions are studied. The theoretical results for $^{17}$Ne and $^{45}$Fe decays are updated and uncertainties of the derived values are discussed in detail. Correlations for the decay of $^{17}$Ne $3/2^-$ state are also studied.Comment: 19 pages, 20 figure

P. Pascal’s Russian Diary: War and Revolution in Russia through the Eyes of a French Military Expert

Vladimir Babintzev, a professor at Ural Federal University, well-known for translating numerous French, scholarly works into Russian (Jacques Le Hoffe and Emmanuel Le Roi Ladurie among others), will offer a new translation. This new translation will be of a primary source, instead of a scholarly work: i.e., the 1st volume of Russian Diary written by Pierre Pascal, a member of French military mission in Russia during the First World War. In a talk with Konstantin Bugrov, a researcher in the laboratory for studying primary sources at Ural Federal University, Babintzev discusses different aspects of Pascal’s diary, the 1st volume of which covers years 1916 and 1917. What did Pierre Pascal think of war, discipline and revolution? What was his interest in religion and in the ‘mysterious Russian soul’: a riddle he sought to solve for 17 years, until he left the Soviet Union for France in 1933. And although he gained a reputation for being a ‘leftist’ in France, the 1st volume of his Russian Diary deals much more with religion and national identity. Indeed Vladimir Soloviev is mentioned much more often than Vladimir Lenin. All these aspects surely make this a pioneering translation of Pascal’s work, which will attract the interest of a broad range of Russian readers.Владимир Бабинцев, доцент Уральского федерального университета, хорошо известный многочисленными переводами французских научных трудов на русский язык (включая Жака Ле Гоффа и Эммануэля Ле Руа Ладюри среди прочих), представляет новый перевод. На этот раз речь идет об аутентичном источнике, а не о переводе исследования: первый том «Русского дневника», написанного Пьером Паскалем, членом французской военной миссии в России времен Первой мировой войны. В беседе с Константином Бугровым, научным сотрудником лаборатории эдиционной археографии Уральского федерального университета, Владимир Бабинцев касается различных аспектов дневника Паскаля, первый том которого охватывает 1916 и 1917 годы. Что Пьер Паскаль думал о войне, военной дисциплине и революции? Каков был его интерес к религии и «загадочной русской душе» – загадка, которую он решал в течение 17 лет, пока в 1933 году не покинул Советский Союз ради Франции. Хотя Паскаль стяжал себе во Франции репутацию «левого», первый том его «Дневника» в гораздо большей степени посвящен вопросам религии и национальной идентичности, а Владимир Соловьев упоминается чаще Владимира Ленина. Все эти аспекты, без сомнения, делают работу Паскаля интересной для широкого круга русских читателей.Статья подготовлена в рамках реализации гранта Правительства РФ по привлечению ведущих ученых в российские образовательные учреждения высшего профессионального образования и научные учреждения государственных академий наук и государственные научные центры Российской Федерации. (Лаборатория эдиционной археографии, Уральский федеральный университет). Договор № 14.А12.31.0004 от 26.06.2013 г

Decay Rate of Triaxially-Deformed Proton Emitters

The decay rate of a triaxially-deformed proton emitter is calculated in a particle-rotor model, which is based on a deformed Woods-Saxon potential and includes a deformed spin-orbit interaction. The wave function of the $I=7/2^{-}$ ground state of the deformed proton emitter $^{141}$Ho is obtained in the adiabatic limit, and a Green's function technique is used to calculate the decay rate and branching ratio to the first excited 2$^{+}$ state of the daughter nucleus. Only for values of the triaxial angle $\gamma$ $<5^{\circ}$ is good agreement obtained for both the total decay rate and the 2$^{+}$ branching ratio.Comment: 19 pages, 4 figure

Time-dependent properties of proton decay from crossing single-particle metastable states in deformed nuclei

A dynamical study of the decay of a metastable state by quantum tunneling through an anisotropic, non separable, two-dimensional potential barrier is performed by the numerical solution of the time-dependent Schrodinger equation. Initial quasi- stationary proton states are chosen in the framework of a deformed Woods-Saxon single-particle model. The decay of two sets of states corresponding to true and quasi levels-crossing is studied and the evolution of their decay properties as a function of nuclear deformation is calculated around the crossing point. The results show that the investigation of the proton decay from metastable states in deformed nuclei can unambiguously distinguish between the two types of crossing and determine the structure of the nuclear states involved.Comment: 15 pages, 9 figures, submitted to Phys. Rev.

Delimiting the Origin of a B Chromosome by FISH Mapping, Chromosome Painting and DNA Sequence Analysis in Astyanax paranae (Teleostei, Characiformes)

Supernumerary (B) chromosomes have been shown to contain a wide variety of repetitive sequences. For this reason, fluorescent in situ hybridisation (FISH) is a useful tool for ascertaining the origin of these genomic elements, especially when combined with painting from microdissected B chromosomes. In order to investigate the origin of B chromosomes in the fish species Astyanax paranae, these two approaches were used along with PCR amplification of specific DNA sequences obtained from the B chromosomes and its comparison with those residing in the A chromosomes. Remarkably, chromosome painting with the one-arm metacentric B chromosome probe showed hybridization signals on entire B chromosome, while FISH mapping revealed the presence of H1 histone and 18S rDNA genes symmetrically placed in both arms of the B chromosome. These results support the hypothesis that the B chromosome of A. paranae is an isochromosome. Additionally, the chromosome pairs Nos. 2 or 23 are considered the possible B chromosome ancestors since both contain syntenic H1 and 18S rRNA sequences. The analysis of DNA sequence fragments of the histone and rRNA genes obtained from the microdissected B chromosomes showed high similarity with those obtained from 0B individuals, which supports the intraspecific origin of B chromosomes in A. paranae. Finally, the population hereby analysed showed a female-biased B chromosome presence suggesting that B chromosomes in this species could influence sex determinism.This research was funded by grants from the State of São Paulo Research Foundation (FAPESP) to DMZAS (2011/16825-3) and CO (2010/17009-2), grants from National Council for Research and Development (CNPq) to FF and by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

The Mega-grant of Historians

О первом этапе реализации российско-французского исследовательского проекта ИГНИ УрФУ «Возвращение в Европу: российские элиты и европейские инновации, нормы и модели (XVIII - начало XX в.)».About the first stage of implementation of the IGNI Russian-French research project UrFU "Return to Europe: the Russian elite and the European innovations, norms and models (XVIII - the beginning of the XX century)"