262,424 research outputs found
Fission and quasifission toward the superheavy mass region
No full textThe pathway toward the production of superheavy elements (SHE) crosses
with the one of an in-depth study of the fission and quasifission processes.
Quasifission affects the probability of forming a compound nucleus (CN) after
capture and fission plays a decisive role during the cooling of the CN. To
search for optimal reactions to produce SHE in fusion reactions and to provide
an estimate of their production cross section measurements of the capture and
fusion cross sections along with the survival probabilities are a mandatory
task. Here an overview of the impact of fission and quasifission over the
synthesis of SHE is discussed along with the need to perform measurements
over a wide range of masses and energies
Fusion and fission of heavy and superheavy nuclei (experiment)
No full textThe scope of this review is to summarize the main advancements in the search of signatures of the compound nucleus fission and quasifission processes in heavy and superheavy systems. The understanding of fusion and fission in heavy and superheavy elements is needed for tracing paths aimed at reaching the island of stability situated near Z = 114-122 and N = 184. With increasing charge of the interacting nuclei other processes, like quasifission, emerge and compete against fusion. Hence also their study must be pursued. After a brief look at the experimental techniques, the behavior of several observables is extracted from the most recent data to aid in the disentanglement of the various competing processes which hinder the production of superheavy elements. (C) 2015 Elsevier B.V. All rights reserved
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Physics of Atomic Nuclei V. 66, I. 06
No full textPhysics of Atomic Nuclei -- June 2003
Volume 66, Issue 6, pp. 1009-1210
Exotic Nuclei: From Superheavies to Hyper- and Antimatter
W. Greiner
pp. 1009-1014 Full Text: PDF (294 kB)
Calculated Masses of Heaviest Nuclei
I. Muntian, Z. Patyk, and A. Sobiczewski
pp. 1015-1019 Full Text: PDF (173 kB)
The Study of Superheavy Elements at SHIP: Results and Plans
S. Hofmann
pp. 1020-1025 Full Text: PDF (147 kB)
An Idea for Predicting the Evaporation Residue Cross Section in Superheavy Mass Region
M. Ohta and Y. Aritomo
pp. 1026-1032 Full Text: PDF (248 kB)
Fusion–Fission Dynamics and Perspectives of Future Experiments
V. I. Zagrebaev, M. G. Itkis, and Yu. Ts. Oganessian
pp. 1033-1041 Full Text: PDF (1008 kB)
The Upgrade of the Kinematic Separator VASSILISSA—Experimental Results and Plans
A. V. Yeremin, A. V. Belozerov, M. L. Chelnokov, V. I. Chepigin, V. A. Gorshkov, A. P. Kabachenko, O. N. Malyshev, Yu. Ts. Oganessian, A. G. Popeko, R. N. Sagaidak, A. I. Svirikhin, S. Hofmann, G. Berek, I. Brida, and S. Saro
pp. 1042-1052 Full Text: PDF (302 kB)
Effect of Nuclear Shell Structure on Fusion Reaction
H. Ikezoe, K. Satou, S. Mitsuoka, K. Nishio, and S. C. Jeong
pp. 1053-1056 Full Text: PDF (173 kB)
Theory of Fusion for Superheavy Elements
Y. Abe, C. W. Shen, G. I. Kosenko, and D. Boilley
pp. 1057-1064 Full Text: PDF (243 kB)
The Mechanism of Compound Nucleus Formation in Complete Fusion of Two Massive Nuclei
V. V. Volkov
pp. 1065-1070 Full Text: PDF (262 kB)
Synthesis of Heavy and Superheavy Elements by Reactions of Massive Nuclei
G. Fazio, G. Giardina, A. Lamberto, R. Ruggeri, F. Bonsignore, R. Palamara, A. I. Muminov, A. K. Nasirov, B. Benoit, F. Hanappe, T. Materna, and L. Stuttgé
pp. 1071-1085 Full Text: PDF (342 kB)
Competition of Fusion and Quasifission in the Reactions Leading to Production of Superheavy Elements
M. Veselsky
pp. 1086-1094 Full Text: PDF (229 kB)
Cold Valleys of Superheavy Elements with Deformed Targets and Projectiles
S. Misicu and W. Greiner
pp. 1095-1104 Full Text: PDF (886 kB)
Analysis of Fusion–Fission Process with Neutron Evaporation in Superheavy Mass Region
Y. Aritomo and M. Ohta
pp. 1105-1113 Full Text: PDF (402 kB)
Reaction Dynamics at the Barrier for Heavy Compound Systems
D. Ackermann
pp. 1114-1117 Full Text: PDF (151 kB)
Fusion–Fission of Heavy and Superheavy Nuclei
M. G. Itkis, S. Beghini, A. A. Bogatchev, L. Corradi, O. Dorvaux, A. Gadea, G. Giardina, A. A. Goverdovski, F. Hanappe, I. M. Itkis, M. Jandel, J. Kliman, G. N. Kniajeva, N. A. Kondratiev, I. V. Korzyukov, E. M. Kozulin, L. Krupa, L. Latina, T. Materna, G. Montagnoli, K. J. Moody, Yu. Ts. Oganessian, I. V. Pokrovsky, V. A. Ponomarenko, E. V. Prokhorova, N. Rowley, A. Ya. Rusanov, F. Scarlassara, A. M. Stefanini, L. Stuttgé, S. Szilner, M. Trotta, A. M. Vinodkumar, and V. M. Voskressensky
pp. 1118-1124 Full Text: PDF (1520 kB)
Accuracy of the Chemical Data Evaluated from One-Atom-at-a-Time Experiments
I. Zvára
pp. 1125-1130 Full Text: PDF (174 kB)
Heavy Element Nuclear Chemistry at JAERI
Y. Nagame, M. Asai, H. Haba, K. Tsukada, I. Nishinaka, S. Goto, A. Toyoshima, K. Akiyama, M. Sakama, Y. L. Zhao, S. Ichikawa, and H. Nakahara
pp. 1131-1136 Full Text: PDF (202 kB)
New Outlook on the Possible Existence of Superheavy Elements in Nature
A. Marinov, S. Gelberg, D. Kolb, R. Brandt, and A. Pape
pp. 1137-1145 Full Text: PDF (246 kB)
Perspective for the Determination of Chemical Properties of Element 112
R. Eichler et al. (for a PSI–University Bern–GSI–TU Munich–FLNR–University Mainz–IMP Collaboration)
pp. 1146-1151 Full Text: PDF (236 kB)
Accuracy and Efficiency of Modern Methods for Electronic Structure Calculation on Heavy- and Superheavy-Element Compounds
A. V. Titov, N. S. Mosyagin, T. A. Isaev, and A. N. Petrov
pp. 1152-1162 Full Text: PDF (223 kB)
Probing Fission Time Scales with Neutrons and GDR Gamma Rays
R. P. Schmitt, T. Botting, G. G. Chubarian, K. L. Wolf, B. J. Hurst, H. Jabs, M. Hamelin, A. Bacak, Yu. Ts. Oganessian, M. G. Itkis, E. M. Kozulin, N. A. Kondratiev, V. S. Salamatin, I. V. Pokrovsky, F. Hanappe, E. de Goès Brennand, A. Huck, L. Stuttgé, E. Liatard, J. Beene, R. Varner, M. Halbert, and N. Gan
pp. 1163-1167 Full Text: PDF (238 kB)
Tracking Dissipation in Capture Reactions
T. Materna, C. Schmitt, Y. Aritomo, J. Bartel, B. Benoit, A. A. Bogatchev, E. de Goès Brennand, O. Dorvaux, G. Giardina, F. Hanappe, M. G. Itkis, I. M. Itkis, J. Kliman, G. N. Kniajeva, N. A. Kondratiev, E. M. Kozulin, L. Krupa, Yu. Ts. Oganessian, I. V. Pokrovsky, E. V. Prokhorova, N. Rowley, K. Siwek-Wilczynska, and L. Stuttgé
pp. 1168-1172 Full Text: PDF (195 kB)
The Complex Trajectory Method and Dissipation in Fission
F. F. Karpeshin
pp. 1173-1177 Full Text: PDF (137 kB)
Fission Paths in Fm Region Calculated with the Gogny Forces
M. Warda, J. L. Egido, L. M. Robledo, and K. Pomorski
pp. 1178-1181 Full Text: PDF (148 kB)
Fission Dynamics with the 4pi Detector 8piLP
E. Vardaci, A. Brondi, G. La Rana, R. Moro, A. Ordine, A. Boiano, M. A. DiMeo, A. Scherillo, D. Fabris, M. Lunardon, G. Nebbia, G. Viesti, M. Cinausero, E. Fioretto, G. Prete, N. Gelli, and F. Lucarelli
pp. 1182-1189 Full Text: PDF (307 kB)
Isotopic Invariance of Fission Fragment Charge Distributions for Actinide Nuclei at Excitation Energies above 10 MeV
D. M. Gorodisskiy, S. I. Mulgin, A. Ya. Rusanov, and S. V. Zhdanov
pp. 1190-1197 Full Text: PDF (315 kB)
The Effect of the Entrance Channel on the Fission of 216Ra
I. V. Pokrovsky, A. Yu. Chizhov, M. G. Itkis, I. M. Itkis, G. N. Kniajeva, E. M. Kozulin, N. A. Kondratiev, R. N. Sagaidak, V. M. Voskressensky, L. Corradi, A. M. Stefanini, M. Trotta, A. M. Vinodkumar, S. Beghini, G. Montagnoli, F. Scarlassara, A. Ya. Rusanov, F. Hanappe, O. Dorvaux, N. Rowley, and L. Stuttgé
pp. 1198-1202 Full Text: PDF (225 kB)
Reduction Coefficient in Surface-Plus-Window Dissipation: Analysis of Experimental Data From Fusion–Fission Reactions within a Stochastic Approach
P. N. Nadtochy, A. V. Karpov, D. V. Vanin, and G. D. Adeev
pp. 1203-1210 Full Text: PDF (212 kB)Archived web conten
Bimodal fission of Hs*
No full textMass and energy distributions of fission fragments obtained in the reactions 22Ne + 249Cf, 26Mg + 248Cm, and 22Ne + 238U have been measured. A special attention will be paid on the properties of mass-energy distribution of fission fragments obtained in the reaction 26Mg + 248Cm at an excitation energy of 35 MeV. At this energy shell effects should become more effective in fission, the TKE distribution of symmetric fragments obtained in the reaction 26Mg + 248Cm differs strongly from a Gaussian shape. Besides a low-energy component, a high-energy component, not foreseen in the LDM, arises. This is attributed to the fact that both fission fragments are close to the spherical neutron shell N 82. It means that for the compound nucleus 274Hs*, formed in the reaction 26Mg + 248Cm, the phenomenon of bimodal fission was observed for the first time. For the compound nucleus 260No* formed in the reaction 22Ne + 238U at the initial excitation energy of 41 MeV the bimodal fission as well as superasymmetric fission were observed. © Published under licence by IOP Publishing Ltd.SCOPUS: cp.jinfo:eu-repo/semantics/publishe
Inverse quasifission in the reactions Gd 156,160 + W 186
No full textBackground:
Low-energy multinucleon transfer reactions may be used for production of new neutron-enriched heavy nuclei.
Purpose:
Our aim is to investigate the influence of proton (Z=82) and neutron (N=82, 126) shells as well as orientation effects on the formation of reaction products in the inverse quasifission process in the reactions 156,160Gd + 186W.
Methods:
Mass, energy, and angular distributions of primary binary fragments formed in the reactions 156Gd+186W at an energy of 878 MeV, and 160Gd+186W at 860 and 935 MeV, have been measured using the double-arm time-of-flight spectrometer CORSET at the U400 cyclotron of the Flerov Laboratory of Nuclear Reactions (FLNR) at the Joint Institute for Nuclear Research (JINR), Dubna.
Results:
Enhancement in the yield of products with masses 200–215 u has been found for both reactions. The cross sections of the formation of trans-target fragments with masses around 208 u are found to be about 10μb at the Coulomb barrier energy and reach the level of 0.5 mb at the energy above the barrier for side-to-side collision.
Conclusions:
The enhanced yield of products with masses heavier than the target mass confirms the important role of the closed shells at
Z=82 and N=82, 126 in the inverse quasifission process in low-energy damped collisions. The orientation effect caused by the strong deformation of colliding nuclei can result in a gain in the yield of heavy target-like fragments
Publisher's Note: Inverse quasifission in the reactions <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Gd</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>156</mml:mn><mml:mo>,</mml:mo><mml:mn>160</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> + <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">W</mml:mi><mml:mprescripts /><mml:none /><mml:mn>186</mml:mn></mml:mmultiscripts></mml:math> [Phys. Rev. C <b>96</b> , 064621 (2017)]
No full textProtecting Animals 36: Author Witi Ihimaera
No full textIn this very special episode of Knowing Animals I am joined by beloved New Zealand author Witi Ihimaera. Witi has written many books featuring nonhuman animals. He offers us a non-colonial lens through which to think about the human/nonhuman relationship
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Author in Essay by I. A. Goncharov “Pepiniere”
No full textFeatures of the embodiment of the author’s position in the essay by I. A. Goncharov “Pepiniere” are considered. The relevance of the study is due to the poorly studied poetics of this work. A review of the scientific literature on relevant topics is performed. Methodological and theoretical definitions are given. The scientific novelty of the article is in the fact that for the first time attention is paid to artistic techniques that allow to identify the author's position in the specified literary text. The author of the article grounds her opinion from the fact that, despite the dominance of the subjective point of view, other characters’ views stand out in the work. It is concluded in the study that the text of the work represents a biographical author and author-creator. It was established that the position of the author-creator is expressed through the title, epigraphs, which are quotes, as well as through different points of view, including the author-character, the author-narrator, the characters of the work. The author of the article dwells in detail on different ways of expressing the points of view of the author-character and the author-narrator. It is proved that the point of view of the author-character and the author-narrator can intersect, they are interchanged. The author's development of the term comic “point of view” is presented in the article
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