Results 51 to 60 of about 3,424,751 (303)

Effects of finite width of excited states on heavy-ion sub-barrier fusion reactions

, 1998
We discuss the effects of coupling of the relative motion to nuclear collective excitations which have a finite lifetime on heavy-ion fusion reactions at energies near and below the Coulomb barrier.
A. B. Balantekin, A. B. Balantekin, A. Bohr, A. O. Caldeira, A. Yoshida, C. A. Bertulani, C. H. Dasso, C. H. Dasso, C. H. Dasso, G. Colo, G. F. Bertsch, G. F. Bertsch, J. R. Leigh, J. Takahashi, K. Hagino, K. Hagino, K. Hagino, K. Hagino, K. Hagino, K. Hagino, K. Rusek, L. F. Canto, L. F. Canto, M. Beckerman, M. Dasgupta, M. S. Hussein, M. S. Hussein, M. S. Hussein, N. Rowley, N. Takigawa, N. Takigawa, N. Takigawa, S. Shlomo, S. Y. Lee, S. Yoshida, Y. Hirabayashi, Y. Sakuragi   +36 more
core   +1 more source

Venus–solar wind interaction: Asymmetries and the escape of ions [PDF]

Planetary and Space Science, 2006
We study the interaction between Venus and the solar wind using a global three-dimensional self-consistent quasi-neutral hybrid (QNH) model. The model treats ions (H+, O+) as particles and electrons as a massless charge neutralising fluid. In the analysed Parker spiral interplanetary magnetic field (IMF) case (IMF = [8.09, 5.88, 0] nT) a notable north ...
Kallio, E., Jarvinen, R., Janhunen, P.
openaire   +3 more sources

Measurement of escaping ions in the Fermilab antiproton accumulator [PDF]

Proceedings of International Conference on Particle Accelerators, 2002
Positively charged ions trapped in the negatively charged beam of the Fermilab antiproton accumulator pose a limit to beam stability and density. To better understand the dynamics and the consequences of the beam-ion interaction, we have built and installed a low energy ion detector and energy analyser in the Fermilab accumulator.
P. Zhou, P.L. Colestock, K. Junck, C.A. Crawford   +3 more
openaire   +3 more sources

Detecting swift heavy ion irradiation effects with graphene

, 2013
In this paper we show how single layer graphene can be utilized to study swift heavy ion (SHI) modifications on various substrates. The samples were prepared by mechanical exfoliation of bulk graphite onto SrTiO$_3$, NaCl and Si(111), respectively.
Akcöltekin, S., d`Etat, B. Ban, Lebius, H., Ochedowski, O., Schleberger, M.   +4 more
core   +3 more sources

Oxygen ion escape from Venus in a global hybrid simulation: role of the ionospheric O⁺ ions [PDF]

Annales Geophysicae, 2009
We study the solar wind induced oxygen ion escape from Venus' upper atmosphere and the Venus Express observations of the Venus-solar wind interaction by the HYB-Venus hybrid simulation code.
R. Jarvinen, E. Kallio, E. Kallio, P. Janhunen, S. Barabash, T. L. Zhang, V. Pohjola, I. Sillanpää   +7 more
doaj   +1 more source

Thermospheric Control of the Auroral Source of O+Ions for the Magnetosphere [PDF]

, 1984
Linear theory, model ion-density profiles and MSIS neutral thermospheric predictions are used to investigate the stability of the auroral, topside ionosphere to oxygen cyclotron waves: variations of the critical height, above which the plasma is unstable,
Lockwood, Mike
core   +1 more source

Pickup ions near Mars associated with escaping oxygen atoms [PDF]

Journal of Geophysical Research: Space Physics, 2002
Ions produced by ionization of Martian neutral atoms or molecules and picked up by the solar wind flow are expected to be an important ingredient of the Martian plasma environment. Significant fluxes of energetic (55–72 keV) oxygen ions were recorded in the wake of Mars and near the bow shock by the solar low‐energy detector (SLED) charged particle ...
T. E. Cravens, A. Hoppe, S. A. Ledvina, S. McKenna‐Lawlor   +3 more
openaire   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Review of the impact of Martian crustal magnetic fields on its atmospheric ion escape

地球与行星物理论评
Mars is the most Earth-like planet in the solar system and one of the most accessible targets for spacecraft exploration. Unlike Earth, Mars lacks a global intrinsic magnetic field and only retains localized crustal magnetic anomalies in the southern ...
Yang Ma, Haoyu Lu, Shibang Li
doaj   +1 more source

Kinetic and finite ion mass effects on the transition to relativistic self-induced transparency in laser-driven ion acceleration [PDF]

, 2017
We study kinetic effects responsible for the transition to relativistic self-induced transparency in the interaction of a circularly-polarized laser-pulse with an overdense plasma and their relation to hole-boring and ion acceleration. It is demonstrated
Fülöp, T., Grech, M., Siminos, E., Wettervik, B. Svedung   +3 more
core   +2 more sources