搜索结果: 1-15 共查到“理学 annihilation”相关记录31条 . 查询时间(0.073 秒)
Molecular-dynamics Simulations of Stacking-fault-induced Dislocation Annihilation in Pre-strained Ultrathin Single-crystalline Copper Films
Molecular dynamics dynamic deformation metal structure
2014/12/19
We report results of large-scale molecular-dynamics (MD) simulations of dynamic deformation under biaxial tensile strain of pre-strained single-crystalline nanometerscale- thick face-centered cubic (f...
Nanostructured Singlet Fission Photovoltaics Subject to Triplet-Charge Annihilation
singlet exciton fission photovoltaic triplet charge pentacene
2014/8/21
Singlet exciton fission is an efficient multiple-exciton generation process that is vulnerable to a characteristic loss process: triplet-charge annihilation. This loss process is characterized in sing...
Positron annihilation in the MuPs system
Positron annihilation the MuPs system Atomic Physics
2011/8/17
Abstract: The life-time of the four-body atomic system MuPs ($\mu^{+} e^{-}_2 e^{+}$ or muonium-positronium) against positron annihilation has been evaluated as $\tau = \frac{1}{\Gamma} \approx 4.0763...
Dense DM clumps seeded by cosmic string loops and DM annihilation
dark matter cosmic string cosmology
2011/10/9
The annihilation of the dark matter in clumps around cosmic string loops is studied. These clumps form at the radiation dominated stage and may have densities \gg\rho_{eq}. We conclude that 100 GeV ne...
Constraints on Enhanced Dark Matter Annihilation from IceCube Results
Dark matter Neutrinos Neutrino Telscopes
2011/10/18
Excesses on electromagnetic fluxes measured by ATIC, and the PAMELA and Fermi-LAT telescopes can be explained by dark matter annihilation in our Galaxy. However, this requires large boosts on the dark...
Fields Annihilation and Particles Creation in DBI inflation
Fields Annihilation Particles Creation DBI inflation
2010/12/24
We consider a model of DBI inflation where two stacks of mobile branes are moving ultra relativistically in a warped throat. The stack closer to the tip of the throat is annihilated with the backgroun...
Pilot Wave model that includes creation and annihilation of particles
Pilot Wave model includes creation particles
2010/11/16
The purpose of this paper is to come up with a Pilot Wave model of quantum field theory that incorporates particle creation and annihilation without sacrificing determinism. This has been previously a...
Positron annihilation spectrum from the Galactic Centre region observed by SPI/INTEGRAL, revisited: annihilation in a cooling ISM?
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/24
We analyse SPI/INTEGRAL data on the 511 keV line from the Galactic Centre, accumulated over ~6 years of observations.
Quantum physics has revealed many interesting formal properties associated with the algebra of two operators, A and B, satisfying the partial commutation relation AB-BA=1. This study surveys the relat...
Emergence and annihilation of localized structures in a phytoplankton-nutrient model
Emergence annihilation of localized structures phytoplankton-nutrient model
2010/12/15
Co-limitation of marine phytoplankton by light and nutrient leads to complex dynamic behavior and a wide array of coherent patterns. The building blocks of this array can be considered to be deep chlo...
Strong coupling，charm- and bottom-quark masses from electron-positron annihilation
strong coupling quark masses
2010/5/7
The cross section for electron-positron annihilation into hadrons allows for a precise determination of the strong coupling constant and the charm- and bottom-quark masses. Recent theoretical and expe...
Gamma rays and neutrinos from dark matter annihilation in galaxy clusters
dark matter Gamma rays galaxy clusters
2010/3/9
The $\gamma$-ray and neutrino emissions from dark matter (DM) annihilation in galaxy clusters are studied. After about one year operation of Fermi-LAT, several nearby clusters are reported with string...
Identification of pore size in porous SiO2 thin film by positron annihilation
Al-Si thin film porous SiO2 thin film positron annihilation
2009/8/14
Positron annihilation lifetime and Doppler broadening of annihilation line techniques have been used to obtain information about the small pore structure and size of porous SiO2 thin film produced by ...
Positronium annihilation in silica aerogel studied by a positron age-momentum correlation technique
positron age-momentum correlation positronium formation positron states silica aerogel
2009/8/14
A high-performance positron age-momentum correlation (AMOC) spectrometer was newly developed. The counting rate is increased up to 200 cps much larger than the value 20~cps reported by other internati...
Study of pure annihilation decays Bd,s→D0D0
perturbative QCD approach B meson CP violation
2009/8/14
Within the heavy quark limit and the hierarchy approximation λQCD<< mD<analyze the B→D0D0 and Bs→D0D0 decays, which occur purely via annihilation type diagrams. As a rough estimate, we calcula...