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Articles de revues sur le sujet « Super-Heavy elements (SHE) »

Auteur : Grafiati

Publié le 25 janvier 2025

Mis à jour le 31 juillet 2025

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1

T.Sahoo, R.L.Nayak, and A.Acharya. "THRESHOLD ENERGY VALUES FOR SUPER HEAVY ELEMENTS(SHE) FROM Z= 104 TO 117." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 3 (2016): 663–66. https://doi.org/10.5281/zenodo.48331.

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Super heavy elements (SHE) are the heavy elements in the periodic table.Generally transuranic and transactinide elements having Z > 92 come under this category. The surface energy,coulomb energy,threshold energies for the super heavy elements from Z=104 to 117 are calculated here. applications The to the astrophysics are discussed.  

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WIELOCH, A., Z. SOSIN, P. BAŃKA, et al. "NEW DETECTOR SYSTEM FOR SUPER HEAVY ELEMENTS DETECTION." International Journal of Modern Physics E 19, no. 04 (2010): 672–77. http://dx.doi.org/10.1142/s0218301310015084.

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A new detector system dedicated for very/super heavy elements (VHE/SHE) detection that decay by spontaneous fission is presented. Such a decay mode of nuclei can be found e.g. in the region of Z ≈100 (Fermium). Future experiments realized in the frame of French-Polish collaboration at the cyclotrons in GANIL and in the Heavy Ion Laboratory (HIL), University of Warsaw, is described. The results of test measurements made in the HIL for reactions 20 Ne (8 A . MeV )+120 Sn , 179 Au are presented.

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BOILLEY, DAVID, ANTHONY MARCHIX, DAVID WILGENBUS, YOANN LALLOUET, FLORIAN GIMBERT, and YASUHISA ABE. "WHAT CAN WE LEARN FROM THE FISSION TIME OF THE SUPER-HEAVY ELEMENTS?" International Journal of Modern Physics E 17, no. 09 (2008): 1681–93. http://dx.doi.org/10.1142/s0218301308010696.

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Recent experiments performed at GANIL with a crystal blocking technique have shown direct evidences of long fission times in the Super-Heavy Elements (SHE) region. Aimed to localize the SHE island of stability, can these experiments give access to the fission barrier and then to the shell-correction energy? In this paper, we calculate the fission time of heavy elements by using a new code, KEWPIE2, devoted to the study of the SHE. We also investigate the effect of potential structure beyond the saddle on the fission time.

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SCHINDZIELORZ, N., J. ERLER, P. KLÜPFEL, P. –G REINHARD, and G. HAGER. "FISSION OF SUPER-HEAVY NUCLEI EXPLORED WITH SKYRME FORCES." International Journal of Modern Physics E 18, no. 04 (2009): 773–81. http://dx.doi.org/10.1142/s0218301309012860.

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We present a large scale survey of life-times for spontaneous fission in the regime of super-heavy elements (SHE), i.e. nuclei with Z =104-122. This is done on the basis of the Skyrme-Hartree-Fock model. The axially symmetric fission path is computed using a quadrupole constraint. Self-consistent cranking is used for the collective masses and associated quantum corrections. The actual tunneling probability is estimated by the WKB approximation. Three typical Skyrme forces are used to explore the sensitivity of the results. Benchmarks in the regime Z =104-108 show an acceptable agreement. The g

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Solovyev, D. I., and N. D. Kovrizhnykh. "Simulations of recoil trajectories in Dubna Gas-Filled Recoil Separator 2 by GEANT4 toolkit." Journal of Instrumentation 17, no. 07 (2022): P07033. http://dx.doi.org/10.1088/1748-0221/17/07/p07033.

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Abstract Dubna Gas-Filled Recoil Separator (DGFRS-2) is a new facility at the Super Heavy Element Factory which allows us to study the properties of superheavy elements (SHEs) formed in complete fusion reactions in the femtobarn cross-section range. High dispersion and complex magnetic configuration make it difficult to tune the separator and find the optimal current values in the magnetic elements. This work presents a simulation model of the DGFRS-2 based on a GEANT4 toolkit. The main methods of trajectory simulations of heavy ions in gaseous media are discussed and several new processes are

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Bhattacharya, P., A. Sen, T. K. Ghosh, N. Majumdar, and S. Mukhopadhyay. "Development of Micro-Pattern Gaseous Detectors for Nuclear Reaction Studies." Journal of Physics: Conference Series 2349, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1742-6596/2349/1/012017.

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One of the frontiers of today’s nuclear physics research is the synthesis of Super Heavy Elements (SHE). Fusion-fission dynamics, namely the competition between quasi fission and fusion is one of the key challenges to optimize the SHE. To have an insight into the dynamics, one requires the study of fission fragment mass and angular distribution near barrier energies for heavy-ion induced fission reactions. Recent successful installation of linear accelerators in India offers a unique opportunity to study the dynamics of nuclear reactions and formation process of SHE. For the effective utilizat

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Bhattacharya, Purba, Arijit Sen, Tilak Kumar Ghosh, Nayana Majumdar, and Supratik Mukhopadhyay. "Development of THGEM-based Detectors for Nuclear Fission Studies." Journal of Physics: Conference Series 2374, no. 1 (2022): 012156. http://dx.doi.org/10.1088/1742-6596/2374/1/012156.

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To optimize the exploration of Super Heavy Elements (SHE), the key challenge is to understand the dynamics of the fusion-fission through the measurements of mass and angular distribution of the fission fragments. For the detection of fission fragments, position sensitive Multi-Wire Proportional Counters are generally used due to their high gain, good temporal and position resolution. However, these detectors use fragile anode wires having a diameter of only 10 μm and therefore they are vulnerable. In the present work, a detector based on robust Thick Gaseous Electron Multiplier (THGEM) has bee

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Manjunatha, H. C., N. Manjunatha, and L. Seenappa. "Investigations on the study of entrance channel effects in synthesis of superheavy elements using Cr-induced fusion reactions." International Journal of Modern Physics E 29, no. 08 (2020): 2050061. http://dx.doi.org/10.1142/s0218301320500615.

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We have investigated the synthesis of superheavy elements using Cr-induced fusion reactions. We have studied all possible Cr-induced fusion reactions for the synthesis of super heavy nuclei [Formula: see text]. We have achieved the semi-empirical formula for fusion barrier heights ([Formula: see text]), positions ([Formula: see text]), curvature of the inverted parabola ([Formula: see text]) of Cr-induced fusion reactions for the synthesis of superheavy nuclei with atomic number range [Formula: see text]. The proposed formula produces fusion barriers of Cr-induced fusion reactions for the synt

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Rahul, R., B. Nandana, and S. Mahadevan. "Calculation of Q-value and half-life of alpha decay in super heavy elements using S-matrix theory." International Journal of Modern Physics E 29, no. 07 (2020): 2050043. http://dx.doi.org/10.1142/s0218301320500433.

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The half-life and the [Formula: see text]-value of alpha decay in several super heavy elements are calculated. The nuclear potential is computed using the double-folding method. Using the S-matrix theory, the alpha decay is treated as a scattering problem between alpha particle and the daughter nucleus. Nuclear potential was approximated by the parameterized Woods–Saxon potential. This idea has also been extended to predict the half-life and the [Formula: see text]-value of the heaviest elements of few other alpha chains.

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Kovrizhnykh, N. D., Yu Ts Oganessian, V. K. Utyonkov, et al. "First experiment at the Super Heavy Element Factory: new data from the <sup>243</sup>Am + <sup>48</sup>Ca reaction." Известия Российской академии наук. Серия физическая 87, no. 8 (2023): 1077–83. http://dx.doi.org/10.31857/s0367676523701946.

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We presented the results of the series of experiments on the synthesis of Mc isotopes in the 243Am + 48Ca reaction performed at the new separator DGFRS-2 and cyclotron DC280 of the SHE Factory at FLNR JINR. There were registered 110 new 288Mc decay chains, 10 289Mc chains, and 4 287Mc chains. Alpha decay of 268Db with an energy of 7.6–8.0 MeV, half-life \(16_{{ - 4}}^{{ + 6}}\) h and α-branch \(51_{{ - 12}}^{{ + 14}}\% \) was registered for the first time together with a new spontaneously fissioning isotope 264Lr with a half-life of \(4.8_{{ - 1.3}}^{{ + 2.2}}\,\,{\text{h}}.\) The measured cro

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Arun, Kumar Chakraborty, and Ghosal Mainak. "Using Coal Ash for Waste to Wealth Creation." Abstracts of International Conferences & Meetings (AICM) 1, no. 3 (2021): 2. https://doi.org/10.5281/zenodo.5047301.

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<strong>Introduction: </strong>Coal ash, a by-product of coal-based thermal power plants was considered a waste in the past as it posed many ecological and environmental problems. From the combustion of coal, a large amount of ash is generated which are also called ‘coal ash’ or ‘fly ash’. Development often extracts a very heavy price in and around the surrounding areas where thermal power plants have come up. India ranks 4<sup>th</sup> in the world in the production of this non-virgin waste after Russia, the US, and China (1). <strong>Brief Discussion:</strong> The nat

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Aprahamian, Ani. "Science brings nations together: Mary Good and the heaviest atoms and nuclei." Pure and Applied Chemistry, November 2, 2023. http://dx.doi.org/10.1515/pac-2023-1003.

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Abstract The 20th century started with the realization that working together and collaborating expedites new discoveries. The Solvay Conference in 1911 brought together scientists to try to understand the real nature of matter, the new elements, and their properties. Through global conflicts, the scientists stayed in communication and organized IUPAC and IUPAP to stay current in advances internationally in chemistry and physics, respectively. The outcomes include the discovery and naming of the elements that complete the periodic table of elements and the chart of nuclides with the heavy atoms

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Abe, Yasuhisa, David Boilley, Quentin Hourdillé, and Caiwan Shen. "A dynamical study of fusion hindrance with the Nakajima–Zwanzig projection method." Progress of Theoretical and Experimental Physics 2021, no. 2 (2021). http://dx.doi.org/10.1093/ptep/ptab005.

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Abstract A new framework is proposed for the study of collisions between very heavy ions which lead to the synthesis of Super-Heavy Elements (SHE), to address the fusion hindrance phenomenon. The dynamics of the reaction is studied in terms of collective degrees of freedom undergoing relaxation processes with different time scales. The Nakajima–Zwanzig projection operator method is employed to eliminate fast variables and derive a dynamical equation for the reduced system with only slow variables. There, the time evolution operator is renormalised and an inhomogeneous term appears, which repre

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Prathapan, K., and R. K. Biju. "Empirical formula for heavy cluster decay in the superheavy region." International Journal of Modern Physics E 30, no. 12 (2021). http://dx.doi.org/10.1142/s0218301321501068.

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In this paper, an empirical formula to describe the heavy cluster decay with [Formula: see text] ([Formula: see text] is the charge number of the emitted cluster) from superheavy elements is proposed. The predictions of our formula are compared with the predictions of Coulomb and Proximity Potential Model (CPPM), the predictions of Analytical Super Asymmetric Fission (ASAF) model and the predictions by UDL formula of Qi et al. Excellent agreement is found between the predictions of CPPM and ASAF models and those of the present formula. Using our formula, we have calculated the decay half-lives

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Igritsky, V. A. "Evaluation of the convenience of servicing elements of super-heavy space rockets with various technologies for their preparation." Engineering Journal: Science and Innovation, no. 4 (112) (April 2021). http://dx.doi.org/10.18698/2308-6033-2021-4-2072.

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Currently, Russia, the United States and China are creating new super-heavy class (SHC) launch vehicles (LV). One of the distinctive features of SHC LV and their elements is their large cross dimensions, up to 10 m in diameter, which significantly exceeds the characteristic cross dimensions of LV elements of other classes. This has a significant impact on the serviceability of these elements in preparation for launch and, consequently, on the productivity, safety and reliability of the corresponding operations, and, as a result, on the reliability of the SHC LV as a whole. The paper analyzes t

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Stewart, Jon. "Oh Blessed Holy Caffeine Tree: Coffee in Popular Music." M/C Journal 15, no. 2 (2012). http://dx.doi.org/10.5204/mcj.462.

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Introduction This paper offers a survey of familiar popular music performers and songwriters who reference coffee in their work. It examines three areas of discourse: the psychoactive effects of caffeine, coffee and courtship rituals, and the politics of coffee consumption. I claim that coffee carries a cultural and musicological significance comparable to that of the chemical stimulants and consumer goods more readily associated with popular music. Songs about coffee may not be as potent as those featuring drugs and alcohol (Primack; Schapiro), or as common as those referencing commodities li

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Young, Sherman. "Beyond the Flickering Screen: Re-situating e-books." M/C Journal 11, no. 4 (2008). http://dx.doi.org/10.5204/mcj.61.

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The move from analog distribution to online digital delivery is common in the contemporary mediascape. Music is in the midst of an ipod driven paradigm shift (Levy), television and movie delivery is being reconfigured (Johnson), and newspaper and magazines are confronting the reality of the world wide web and what it means for business models and ideas of journalism (Beecher). In the midst of this change, the book publishing industry remains defiant. While embracing digital production technologies, the vast majority of book content is still delivered in material form, printed and shipped the o

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Green, Lelia, Debra Dudek, Cohen Lynne, et al. "Tox and Detox." M/C Journal 25, no. 2 (2022). http://dx.doi.org/10.5204/mcj.2888.

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Introduction The public sphere includes a range of credible discourses asserting that a proportion of teenagers (“teens”) has an unhealthy dependence upon continuous connection with media devices, and especially smartphones. A review of media discourse (Jaunzems et al.) in Australia, and a critical review of public discourse in Australia and Belgium (Zaman et al.), reveal both positive and negative commentary around screentime. Despite the “emotionally laden, opposing views” expressed in the media, there appears to be a groundswell of concern around young people’s dependence upon digital devic

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Green, Lelia, Debra Dudek, Cohen Lynne, et al. "Tox and Detox." M/C Journal 25, no. 2 (2022). http://dx.doi.org/10.5204/mcj.2888.

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Introduction The public sphere includes a range of credible discourses asserting that a proportion of teenagers (“teens”) has an unhealthy dependence upon continuous connection with media devices, and especially smartphones. A review of media discourse (Jaunzems et al.) in Australia, and a critical review of public discourse in Australia and Belgium (Zaman et al.), reveal both positive and negative commentary around screentime. Despite the “emotionally laden, opposing views” expressed in the media, there appears to be a groundswell of concern around young people’s dependence upon digital devic

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Habel, Chad Sean. "Doom Guy Comes of Age: Mediating Masculinities in Power Fantasy Video Games." M/C Journal 21, no. 2 (2018). http://dx.doi.org/10.5204/mcj.1383.

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Introduction: Game Culture and GenderAs texts with the potential to help mediate specific forms of identity, video games are rich and complex sites for analysis. A tendency, however, still exists in scholarship to treat video games as just another kind of text, and work that explores the expression of masculine identity persists in drawing from cinematic analysis without proper consideration of game design and how these games are played (Triana). For example, insights from studies into horror cinema may illuminate the relationship between players and game systems in survival horror video games

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