Results 31 to 40 of about 34,288 (190)

Numerical Investigation of Helium Bubble Rising Behavior in Cross-Type Channel

Frontiers in Energy Research, 2020
In a certain nuclear reactor, the coolant channel is a cross-type channel. There is little research about bubble rising behavior in this kind of channel, but the neutron detection would be affected by the bubbles.
Chunjie Zeng, Chunjie Zeng, Baoxin Yuan, Zhaoming Meng, Xin Zhang, Herui Jiang, Defang Mu, Ruihao Yan   +7 more
doaj   +1 more source

Semi-numeric simulations of helium reionization and the fluctuating radiation background [PDF]

, 2013
Recent He II Lyman-alpha forest observations from 2.0 2.7. These results point to a fluctuating He-ionizing background, which may be due to the end of helium reionization of this era.
Aguirre, Andrei Mesinger, Barkana, Bolton, Bolton, Bolton, Bond, Conroy, Cooray, Davies, Dixon, Fardal, Faucher-Giguère, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Furlanetto, Garzilli, Gleser, Gültekin, Hopkins, Hopkins, Hopkins, Hopkins, Hui, Jakobsen, Jenkins, Kelly, Keri L. Dixon, Kim, Kirkman, Madau, Maselli, Masters, McQuinn, Meiksin, Meiksin, Meiksin, Mesinger, Mesinger, Mesinger, Mesinger, O'Meara, Paschos, Petitjean, Press, Prochaska, Richards, Ross, Rudie, Schaye, Schaye, Schaye, Scott, Shen, Sheth, Shull, Shull, Sokasian, Songaila, Songaila, Steven R. Furlanetto, Syphers, Syphers, Syphers, Syphers, Telfer, Theuns, Theuns, Tittley, Trainor, White, Wolf, Worseck, Worseck, Worseck, Wyithe, Wyithe, Zahn, Zahn, Zaldarriaga, Zel'Dovich, Zuo   +86 more
core   +2 more sources

The solubility of helium in lead–lithium eutectic alloy

Nuclear Materials and Energy, 2022
The helium production rates in liquid metals (Pb-Li eutectic alloy, LLE and others) Blanket Breeders (BB) are nearly mol-to-mol linked to tritium and intimately associated with the compulsory requirement of high tritium self-sufficiency of next fusion ...
L. Sedano, G.A. Esteban, M. Cavaro, E. Iraola, A. Abdulrahman, L. Batet, M. Guasch   +6 more
doaj   +1 more source

Friedel Oscillations and Helium Bubble Ordering in Molybdenum [PDF]

SSRN Electronic Journal, 2020
11 pages, 4 ...
Geng, W. T., Zhan, Q.
openaire   +2 more sources

Sonoluminescence and collapse dynamics of multielectron bubbles in helium [PDF]

, 2004
Multielectron bubbles (MEBs) differ from gas-filled bubbles in that it is the Coulomb repulsion of a nanometer thin layer of electrons that forces the bubble open rather than the pressure of an enclosed gas.
A. P. Volodin, A. P. Volodin, D. Hammer, F. Takemura, I. F. Silvera, J. T. Devreese, J. Tempere, L. P. Gor’kov, L. P. Gor’kov, Lord Rayleigh, O. Baghdassarian, S. Rekhi, V. B. Shikin, V. B. Shikin   +13 more
core   +1 more source

Physics-based modelling and validation of inter-granular helium behaviour in SCIANTIX

Nuclear Engineering and Technology, 2022
In this work, we propose a new mechanistic model for the treatment of helium behaviour at the grain boundaries in oxide nuclear fuel. The model provides a rate-theory description of helium inter-granular behaviour, considering diffusion towards grain ...
R. Giorgi, A. Cechet, L. Cognini, A. Magni, D. Pizzocri, G. Zullo, A. Schubert, P. Van Uffelen, L. Luzzi   +8 more
doaj   +1 more source

Cavitation of Electrons Bubbles in Liquid Helium Below saturation Pressure

, 2005
We have used a Hartree-type electron-helium potential together with a density functional description of liquid $^4$He and $^3$He to study the explosion of electron bubbles submitted to a negative pressure.
A. Guirao, C.-K. Su, C.-K. Su, C.C. Grimes, D. Konstantinov, DM. Jezek, DM. Jezek, DN. Sinha, DW. Oxtoby, E. Tanaka, EM. Chudnovsky, F. Ancilotto, F. Ancilotto, F. Caupin, F. Caupin, F. Dalfovo, F. Dalfovo, H. Lambaré, HJ. Maris, HJ. Maris, HM. Guo, J. Boronat, J. Classen, J. Classen, J. Classen, J. Dupont-Roc, J. Tempere, JA. Nissen, M. Barranco, M. Barranco, M. Guilleumas, M. Guilleumas, M. Iino, M. Iino, M. Rosenblit, M. Rosenblit, Manuel Barranco, Martí Pi, NR. Kestner, P. Roche, Q Xiong, Q. Xiong, RA. Ferrel, Ricardo Mayol, S. Balibar, S. Balibar, T. Nakamura, T. Satoh, Víctor Grau, WH. Press, X. Chavanne   +50 more
core   +2 more sources

Helium Ion Microscopy [PDF]

, 2014
Helium Ion Microcopy (HIM) based on Gas Field Ion Sources (GFIS) represents a new ultra high resolution microscopy and nano-fabrication technique. It is an enabling technology that not only provides imagery of conducting as well as uncoated insulating ...
Hlawacek, Gregor, Poelsema, Bene, van Gastel, Raoul, Veligura, Vasilisa   +3 more
core   +2 more sources

Indivisibility of Electron Bubbles in Helium

Journal of Low Temperature Physics, 2001
A recent proposal by Maris[1], that single electron bubbles in helium might fission into separate, particle-like entities, does not properly take into account the failure of the adiabatic approximation when, due to tunneling, there is a long electronic time scale. The point along the fission pathway of a photoexcited p-state bubble, where the adiabatic
openaire   +2 more sources

Helium behaviour in implanted boron carbide

EPJ Nuclear Sciences & Technologies, 2015
When boron carbide is used as a neutron absorber in nuclear power plants, large quantities of helium are produced. To simulate the gas behaviour, helium implantations were carried out in boron carbide.
Motte Vianney, Gosset Dominique, Miro Sandrine, Doriot Sylvie, Surblé Suzy, Moncoffre Nathalie   +5 more
doaj   +1 more source