327 research outputs found
Adsorption-desorption kinetics in nanoscopically confined oligomer films under shear
The method of molecular dynamics computer simulations is employed to study oligomer melts confined in ultra-thin films and subjected to shear. The focus is on the self-diffusion of oligomers near attractive surfaces and on their desorption, together with the effects of increasing energy of adsorption and shear. It is found that the mobility of the oligomers near an attractive surface is strongly decreased. Moreover, although shearing the system forces the chains to stretch parallel to the surfaces and thus increase the energy of adsorption per chain, flow also promotes desorption. The study of chain desorption kinetics reveals the molecular processes responsible for the enhancement of desorption under shear. They involve sequences of conformations starting with a desorbed tail and proceeding in a very fast, correlated, segment-by-segment manner to the desorption of the oligomers from the surfaces.
Quantum equivalence of sigma models related by non Abelian Duality Transformations
Coupling constant renormalization is investigated in 2 dimensional sigma
models related by non Abelian duality transformations. In this respect it is
shown that in the one loop order of perturbation theory the duals of a one
parameter family of models, interpolating between the SU(2) principal model and
the O(3) sigma model, exhibit the same behaviour as the original models. For
the O(3) model also the two loop equivalence is investigated, and is found to
be broken just like in the already known example of the principal model.Comment: As a result of the collaboration of new authors the previously
overlooked gauge contribution is inserted into eq.(43) changing not so much
the formulae as part of the conclusion: for the models considered non Abelian
duality is OK in one loo
Π‘ΠΎΡΡΠΎΡΠ½ΠΈΠ΅ ΠΈΡ ΡΠΈΠΎ-, ΠΌΠ΅Π·ΠΎ- ΠΈ ΠΌΠ°ΠΊΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π½ΡΡ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² Ρ ΠΡΡΠΌΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ»ΡΠΎΡΡΡΠΎΠ²Π° (Π§ΡΡΠ½ΠΎΠ΅ ΠΌΠΎΡΠ΅) Π² ΡΠ²ΡΠ·ΠΈ Ρ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΡΠΌΠΈ Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅ΠΆΠΈΠΌΠ° Π² ΠΎΠΊΡΡΠ±ΡΠ΅ 2016 Π³.
ΠΠ»ΠΈΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π² Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅ Π§ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ, ΠΎΡΠΌΠ΅ΡΠ°Π΅ΠΌΡΠ΅ Ρ 1990-Ρ
Π³Π³., ΠΎΡΡΠ°Π·ΠΈΠ»ΠΈΡΡ Π½Π° ΡΠΎΡΡΠΎΡΠ½ΠΈΠΈ ΡΠΏΠΈΠΏΠ΅Π»Π°Π³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² ΠΌΠΎΡΡΠΊΠΈΡ
ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠΎΠ², ΠΏΡΠ΅ΠΆΠ΄Π΅ Π²ΡΠ΅Π³ΠΎ Π½Π° ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠΉ ΠΈΠ·ΠΌΠ΅Π½ΡΠΈΠ²ΠΎΡΡΠΈ ΠΈΡ
Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΈΠΊΠ»ΠΎΠ². ΠΡΠΎ ΠΎΠΊΠ°Π·Π°Π»ΠΎ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π½Π° ΡΠ΅Π½ΠΎΠ»ΠΎΠ³ΠΈΡ Π½Π΅ΡΠ΅ΡΡΠ° ΠΏΡΠΈΡΠΎΠ΄Π½ΡΡ
ΠΏΠΎΠΏΡΠ»ΡΡΠΈΠΉ ΡΡΠ±, Π²ΠΈΠ΄ΠΎΠ²ΠΎΠ΅ ΡΠ°Π·Π½ΠΎΠΎΠ±ΡΠ°Π·ΠΈΠ΅ ΠΈ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΈΡ
ΡΠΈΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π°, Π° ΡΠ°ΠΊΠΆΠ΅ Π½Π° ΡΡΡΠΎΡΠ²ΡΠΈΠ΅ΡΡ ΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π²Π·Π°ΠΈΠΌΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ Π² ΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π½ΠΎΠΌ ΡΠΎΠΎΠ±ΡΠ΅ΡΡΠ²Π΅. Π ΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠΌ ΠΈΡΠΎΠ³Π΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΌΠ΅ΠΆΠ΄Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌΠΈ Π·Π²Π΅Π½ΡΡΠΌΠΈ ΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΠΏΠΈ Π² ΡΠΏΠΈΠΏΠ΅Π»Π°Π³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ°Ρ
, ΠΈΡ
ΡΠ΅Π·ΠΎΠ½Π½Π°Ρ ΠΈ ΠΌΠ΅ΠΆΠ³ΠΎΠ΄ΠΎΠ²Π°Ρ ΠΈΠ·ΠΌΠ΅Π½ΡΠΈΠ²ΠΎΡΡΡ Π²Π»ΠΈΡΡΡ Π½Π° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Π½Π΅ΡΠ΅ΡΡΠ° ΡΡΠ±, ΠΏΡΠ΅ΠΆΠ΄Π΅ Π²ΡΠ΅Π³ΠΎ ΠΌΠ°ΡΡΠΎΠ²ΡΡ
ΠΏΡΠΎΠΌΡΡΠ»ΠΎΠ²ΡΡ
Π²ΠΈΠ΄ΠΎΠ², ΠΈ Π² Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡ ΡΡΠΏΠ΅Ρ
ΠΏΠΎΠΏΠΎΠ»Π½Π΅Π½ΠΈΡ ΠΈΡ
Π±ΡΠ΄ΡΡΠΈΡ
ΠΏΠΎΠΊΠΎΠ»Π΅Π½ΠΈΠΉ. Π‘ ΡΠ΅Π»ΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ Π²ΠΈΠ΄ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π°, ΡΠΈΡΠ»Π΅Π½Π½ΠΎΡΡΠΈ ΠΈ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΈΡ
ΡΠΈΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° Π² ΠΎΠΊΡΡΠ±ΡΠ΅ 2016 Π³. (89-ΠΉ ΡΠ΅ΠΉΡ ΠΠΠ‘ Β«ΠΡΠΎΡΠ΅ΡΡΠΎΡ ΠΠΎΠ΄ΡΠ½ΠΈΡΠΊΠΈΠΉΒ», 30 ΡΠ΅Π½ΡΡΠ±ΡΡ β 19 ΠΎΠΊΡΡΠ±ΡΡ) Π±ΡΠ»ΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π² ΡΠ΅Π»ΡΡΠΎΠ²ΡΡ
ΠΈ ΠΎΡΠΊΡΡΡΡΡ
Π²ΠΎΠ΄Π°Ρ
Π§ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ Ρ ΠΡΡΠΌΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ»ΡΠΎΡΡΡΠΎΠ²Π°, ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ ΠΈΠΊΡΠ° ΠΈ Π»ΠΈΡΠΈΠ½ΠΊΠΈ ΡΡΠ±, Π½ΠΎ ΠΈ Π±ΠΈΠΎΠΌΠ°ΡΡΠ° ΠΌΠ΅Π·ΠΎ- ΠΈ ΠΌΠ°ΠΊΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π°. ΠΡΠΎΠ±Ρ ΠΈΡ
ΡΠΈΠΎ- ΠΈ ΠΌΠ°ΠΊΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΠΎΡΠ±ΠΈΡΠ°Π»ΠΈ ΡΠ΅ΡΡΡ ΠΠΎΠ³ΠΎΡΠΎΠ²Π° β Π Π°ΡΡΠ° (ΠΏΠ»ΠΎΡΠ°Π΄Ρ Π²Ρ
ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΎΡΠ²Π΅ΡΡΡΠΈΡ β 0,5 ΠΌΒ²; ΡΡΠ΅Ρ β 300 ΠΌΠΊΠΌ) ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠΎΡΠ°Π»ΡΠ½ΡΡ
Π²Π΅ΡΡΠΈΠΊΠ°Π»ΡΠ½ΡΡ
Π»ΠΎΠ²ΠΎΠ² ΠΎΡ Π΄Π½Π° Π΄ΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΌΠΎΡΡ Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ΅Π»ΡΡΠ° ΠΈ ΠΎΡ Π½ΠΈΠΆΠ½Π΅ΠΉ Π³ΡΠ°Π½ΠΈΡΡ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π½ΠΎΠΉ Π·ΠΎΠ½Ρ Π΄ΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΌΠΎΡΡ Π² Π³Π»ΡΠ±ΠΎΠΊΠΎΠ²ΠΎΠ΄Π½ΠΎΠΉ ΡΠ°ΡΡΠΈ. ΠΡ
ΡΠΈΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½ ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π»ΠΈ 4%-Π½ΡΠΌ ΡΠ°ΡΡΠ²ΠΎΡΠΎΠΌ ΡΠΎΡΠΌΠ°Π»ΠΈΠ½Π° ΠΈ Π°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π»ΠΈ ΠΏΠΎΠ·ΠΆΠ΅ ΠΏΠΎΠ΄ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠΎΠΌ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡ ΡΠ°ΠΊΡΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΎΡΡΠ°Π² ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΠΈ ΠΏΠΎ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ β Π½Π°Π»ΠΈΡΠΈΠ΅ ΠΈ ΡΠΎΡΡΠ°Π² ΠΏΠΈΡΠΈ Π² ΠΊΠΈΡΠ΅ΡΠ½ΠΈΠΊΠ°Ρ
Π»ΠΈΡΠΈΠ½ΠΎΠΊ ΡΡΠ±. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π΄Π°Π½Π½ΡΠ΅ ΠΎ Π²ΠΈΠ΄ΠΎΠ²ΠΎΠΌ ΡΠΎΡΡΠ°Π²Π΅ ΠΈ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅Π½Π½ΠΎΠΌ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΈ ΠΈΡ
ΡΠΈΠΎ-, ΠΌΠ΅Π·ΠΎ- ΠΈ ΠΌΠ°ΠΊΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π°, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΎ ΠΏΠΈΡΠ°Π½ΠΈΠΈ Π»ΠΈΡΠΈΠ½ΠΎΠΊ ΡΡΠ± Π§ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ Ρ ΠΡΡΠΌΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ»ΡΠΎΡΡΡΠΎΠ²Π° Π² ΠΎΠΊΡΡΠ±ΡΠ΅ 2016 Π³. ΠΠ΅ΡΠΈΠΎΠ΄ ΡΡΡΠΌΠΊΠΈ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΎΠ²Π°Π» Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠΉ ΡΠ°Π·Π΅ ΠΎΡΠ΅Π½Π½Π΅Π³ΠΎ Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅Π·ΠΎΠ½Π°. ΠΡ
ΡΠΈΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½ Π±ΡΠ» ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΠΈΠΊΡΠΎΠΉ ΠΈ Π»ΠΈΡΠΈΠ½ΠΊΠ°ΠΌΠΈ 9 Π²ΠΈΠ΄ΠΎΠ² ΡΠ΅ΠΏΠ»ΠΎΠ²ΠΎΠ΄Π½ΡΡ
ΠΈ 6 Π²ΠΈΠ΄ΠΎΠ² ΡΠΌΠ΅ΡΠ΅Π½Π½ΠΎΠ²ΠΎΠ΄Π½ΡΡ
ΡΡΠ±. Π‘ΡΠ΅Π΄Π½ΡΡ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΡΡΡ ΠΈΠΊΡΡ ΡΡΠ± ΡΠΎΡΡΠ°Π²Π»ΡΠ»Π° 2,92, Π° Π»ΠΈΡΠΈΠ½ΠΎΠΊ β 3,56 ΡΠΊΠ·.Β·ΠΌβ2. ΠΠΈΠ·ΠΊΠ°Ρ Π΄ΠΎΠ»Ρ (30 %) ΠΌΡΡΡΠ²ΠΎΠΉ ΠΈΠΊΡΡ ΡΠ΅ΠΏΠ»ΠΎΠ²ΠΎΠ΄Π½ΠΎΠΉ Ρ
Π°ΠΌΡΡ Engraulis encrasicolus, Π° ΡΠ°ΠΊΠΆΠ΅ Π½Π°Π»ΠΈΡΠΈΠ΅ Π΅Ρ ΡΠ°Π·Π½ΠΎΡΠ°Π·ΠΌΠ΅ΡΠ½ΡΡ
Π»ΠΈΡΠΈΠ½ΠΎΠΊ Π² ΠΌΠΎΡΠ΅ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΠΎΠ²Π°Π»ΠΈ ΠΎ ΠΏΡΠΎΠ΄ΠΎΠ»ΠΆΠ΅Π½ΠΈΠΈ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π½Π΅ΡΠ΅ΡΡΠ°. ΠΠΈΠΎΠΌΠ°ΡΡΠ° Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° Π²ΠΎΠ·ΡΠ°ΡΡΠ°Π»Π° Π² Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠΈ ΠΎΡ ΡΠ΅Π»ΡΡΠ° ΠΊ Π³Π»ΡΠ±ΠΎΠΊΠΎΠ²ΠΎΠ΄Π½ΡΠΌ ΡΠ°ΠΉΠΎΠ½Π°ΠΌ. ΠΠ΅Π»ΠΊΠΎΡΠ°Π·ΠΌΠ΅ΡΠ½ΡΠ΅ ΡΡΠ°ΠΊΡΠΈΠΈ ΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π½ΡΡ
ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΠΏΡΠ΅ΠΎΠ±Π»Π°Π΄Π°Π»ΠΈ Π½Π° ΡΠ΅Π»ΡΡΠ΅, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°Ρ Π·Π΄Π΅ΡΡ Π»ΡΡΡΠΈΠ΅ ΠΊΠΎΡΠΌΠΎΠ²ΡΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΡ Π΄Π»Ρ Π²ΡΠΆΠΈΠ²Π°Π½ΠΈΡ Π»ΠΈΡΠΈΠ½ΠΎΠΊ ΡΡΠ±. ΠΠ΅ΡΠΌΠΎΡΡΡ Π½Π° Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΡΡ Π±ΠΈΠΎΠΌΠ°ΡΡΡ ΠΆΠ΅Π»Π΅ΡΠ΅Π»ΡΡ
-ΠΏΠ»Π°Π½ΠΊΡΠΎΡΠ°Π³ΠΎΠ² Π² ΠΎΠΊΡΡΠ±ΡΠ΅ 2016 Π³., ΠΈΡ
Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π½Π° ΠΈΡ
ΡΠΈΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π½ΡΠ΅ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΡ Π§ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΡΡ, ΠΏΠΎ-Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌΡ, ΠΎΡΡΠ°Π²Π°Π»ΠΎΡΡ Π½Π΅ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠΌ
Structural and transport properties of GaAs/delta<Mn>/GaAs/InxGa1-xAs/GaAs quantum wells
We report results of investigations of structural and transport properties of
GaAs/Ga(1-x)In(x)As/GaAs quantum wells (QWs) having a 0.5-1.8 ML thick Mn
layer, separated from the QW by a 3 nm thick spacer. The structure has hole
mobility of about 2000 cm2/(V*s) being by several orders of magnitude higher
than in known ferromagnetic two-dimensional structures. The analysis of the
electro-physical properties of these systems is based on detailed study of
their structure by means of high-resolution X-ray diffractometry and
glancing-incidence reflection, which allow us to restore the depth profiles of
structural characteristics of the QWs and thin Mn containing layers. These
investigations show absence of Mn atoms inside the QWs. The quality of the
structures was also characterized by photoluminescence spectra from the QWs.
Transport properties reveal features inherent to ferromagnetic systems: a
specific maximum in the temperature dependence of the resistance and the
anomalous Hall effect (AHE) observed in samples with both "metallic" and
activated types of conductivity up to ~100 K. AHE is most pronounced in the
temperature range where the resistance maximum is observed, and decreases with
decreasing temperature. The results are discussed in terms of interaction of
2D-holes and magnetic Mn ions in presence of large-scale potential fluctuations
related to random distribution of Mn atoms. The AHE values are compared with
calculations taking into account its "intrinsic" mechanism in ferromagnetic
systems.Comment: 15 pages, 9 figure
Normal families of functions and groups of pseudoconformal diffeomorphisms of quaternion and octonion variables
This paper is devoted to the specific class of pseudoconformal mappings of
quaternion and octonion variables. Normal families of functions are defined and
investigated. Four criteria of a family being normal are proven. Then groups of
pseudoconformal diffeomorphisms of quaternion and octonion manifolds are
investigated. It is proven, that they are finite dimensional Lie groups for
compact manifolds. Their examples are given. Many charactersitic features are
found in comparison with commutative geometry over or .Comment: 55 pages, 53 reference
New limits on the resonant absorption of solar axions obtained with a Tm-containing cryogenic detector
A search for resonant absorption of solar axions by Tm nuclei was
carried out. A newly developed approach involving low-background cryogenic
bolometer based on TmAlO crystal was used that allowed for
significant improvement of sensitivity in comparison with previous Tm
based experiments. The measurements performed with g crystal during
days exposure yielded the following limits on axion couplings:
GeV and
.Comment: 7 pages, 5 figure
Comparing electron precipitation fluxes calculated from pitch angle diffusion coefficients to LEO satellite observations
Particle precipitation is a loss mechanism from the Radiation Belts whereby particles trapped by the Earthβs magnetic field are scattered into the loss cone due to waveβparticle interactions. Energetic electron precipitation creates ozone destroying chemicals which can affect the temperatures of the polar regions, therefore it is crucial to accurately quantify this impact on the Earthβs atmosphere. We use bounceβaveraged pitch angle diffusion coefficients for whistler mode chorus waves, plasmaspheric hiss and atmospheric collisions to calculate magnetic local time (MLT) dependent electron precipitation inside the field of view of the Polar Orbiting Environmental Satellites (POES) T0 detector, between 26β30 March 2013. These diffusion coefficients are used in the BAS Radiation Belt Model (BASβRBM) and this paper is a first step towards testing the loss in this model via comparison with real world data. We find the best agreement between the calculated and measured T0 precipitation at L* > 5 on the dawnside for the > 30keV electron channel, consistent with precipitation driven by lower band chorus. Additional diffusion is required to explain the flux at higher energies and on the dusk side. The POES T0 detector underestimates electron precipitation as its field of view does not measure the entire loss cone. We demonstrate the potential for utilizing diffusion coefficients to reconstruct precipitating flux over the entire loss cone. Our results show that the total precipitation can exceed that measured by the POES > 30 keV electron channel by a factor that typically varies from 1 to 10 for L* = 6, 6.5 and 7
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