搜索结果: 61-75 共查到“理学 ions”相关记录178条 . 查询时间(0.194 秒)
Heliospheric pick-up ions influencing thermodynamics and dynamics of the distant solar wind
Heliospheric pick-up ions thermodynamics dynamics distant solar wind
2009/11/12
Neutral interstellar H-atoms penetrate into the inner heliosphere and upon the event of ionization are converted into pick-up ions (PUIs). The magnetized solar wind flow incorporates these ions into t...
On resonant interactions of ions with plasma waves in a reduced quasi-linear theory
resonant interactions of ions plasma waves reduced quasi-linear theory
2009/11/12
Based on quasi-linear theory (involving pitch angle scattering), the resonant interactions between ions and waves in an anisotropic multi-component plasma are discussed. In particular, electromagnetic...
Transport and Chemodynamics of Organic Micropollutants and Ions during Snowmelt
Transport Chemodynamics Organic Micropollutants Ions
2009/10/27
By means of laboratory experiments and field measurements we investigated
the chemodynamics and transport behaviour of organic micropollutants and
inorganic ions in melting snowpacks. Dissolved subs...
Relocation of Major Ions in Snow along the Tundra-Taiga Ecotone
Relocation of Major Ions Tundra-Taiga Ecotone
2009/10/26
The chemistry of seasonal snowcovers north of Inuvik, Northwest Territories,
Canada was stratified by biophysical landscape. In this region, deposition of
ions in winter occurs largely through the r...
Release of Major Ions and Hydrogen Peroxide from Homogeneous,Melting Snow
Major Ions Hydrogen Peroxide Melting Snow
2009/10/26
We undertook two laboratory experiments to study the change of concentrations
and the preferential elution of major ions and hydrogen peroxide during melting
of a homogeneous snow pack. The elution ...
Charge stripping accumulation of light heavy ions in HIRFL-CSR main ring
heavy-ion accelerator accumulation stripping injection
2009/8/17
The charge stripping injection method has been adopted for the accumulation of light heavy ions in HIRFL-CSR. This method has some special requirements for the accelerating particles, and at the same ...
Experimental verification of therapeutic doses for the superficially-placed tumor radiotherapy with heavy ions at HIRFL
heavy-ion radiotherapy carbon ions therapeutic dose verification irradiation system dose optimization
2009/8/17
Up to now, clinical trials of heavy-ion radiotherapy for superficially placed tumors have been carried out for six times and over 60 selected patients have been treated with 80—100 MeV/u carbon ions s...
Measurements of 79Se with AMS based on extracting molecular negative ions
79Se accelerator mass spectrometry (AMS) extraction form molecular negative ions isobar Bragg curve detector
2009/8/14
A new method for measuring selenium-79 with AMS, which is based on extracting molecular negative ions, is described in this paper. According to the experimental results, the extraction ion form SeO2－ ...
Production cross-section of 230Ra in the reaction of 60 MeV/u 18O ions with 238U
18O ion 230Ra nature uranium target multinucleon transfer reaction cross section
2009/8/14
A thick natural uranium target was bombarded with a 60 MeV/u 18O beam. The neutron-rich isotope 230Ra as the target residue was produced through the multinucleon transfer reaction(238U-4p-4n). The bar...
Production of highly charged argon ions from a room temperature electron beam ion trap
EBIS highly charged ion ionization time
2009/8/14
In this work, highly charged ions have been extracted from the advanced Electron Beam Ion Source (EBIS-A) developed in a scientific cooperation between the Dresden University of Technology and the DRE...
Study of surface exfoliation on crystalline silicon induced by Co-implantation of He and H ions
crystalline Si He and H ion implantation surface blistering and exfoliation bubbles growth
2009/8/14
Crystalline n-type Si (100) wafers were implanted at room temperature with
160 keV He ions to a fluence of 5×1016cm－2 or 40 keV H ions to a fluence of 1×1016cm－2, singly or in combination, followed ...
Expansion velocities from different ions of planetary nebulae with [wc]-type central stars
different ions planetary nebulae [wc]-type central stars
2009/6/11
Expansion velocities from different ions of planetary nebulae with [wc]-type central stars。
Necessary conditions for the generation of acoustic solitons in magnetospheric and space plasmas with hot ions
acoustic solitons space plasmas magnetospheric
2009/5/27
Necessary conditions are discussed for the possible generation of large solitary acoustic modes in plasmas with one or more ion species which are hotter than some or all of the electron species. The a...
Self-initialised Fermi-1 acceleration by pitch-angle re-scattering of solar wind ions reflected from the parallel termination shock
anomalous cosmic ray process governing pick-up ions solar wind ions
2009/5/27
In a recent kinetic calculation a rather high amount of reflected ions was shown to occur at the solar wind termination shock under a parallel magnetic field orientation. The fate of these reflected i...
The reduction of chromate ions by Fe(II) layered hydroxides
chromate ions Fe(II) layered hydroxides
2009/5/27
The reduction of chromate ions by Fe(OH)2 and the iron (II)-iron (III) hydroxysulphate green rust, GR(SO42-), was studied to evaluate whether such synthetic layered hydroxides and the corresponding na...