scholarly journals DOSE PERFORMANCE OF INTERNAL IRRADIATION FROM INCORPORATED 137CS AND 90SR OF ICHTHIOFAUNA OF RESERVOIRS LOCATED IN THE TERRITORY OF THE POLESSKY STATE RADIATION-ECOLOGICAL RESERVE

2020 ◽  
Vol 3 ◽  
pp. 60-67
Author(s):  
Andrey V. Gulakov ◽  
◽  
Denis N. Drozdov ◽  
Dmitry N. Ivantsov ◽  
◽  
...  
Keyword(s):  
Internal Irradiation ◽  
State Radiation ◽  
Ecological Reserve

Migration ability of plutonium and americium in the soils of Polessie State Radiation-Ecological Reserve

2010 ◽  
Vol 286 (2) ◽  
pp. 409-415 ◽  
Author(s):  
Svetlana Ovsiannikova ◽  
Maryna Papenia ◽  
Katsiaryna Voinikava ◽  
Justin Brown ◽  
Lindys Skipperud ◽  
...  
Keyword(s):  
Migration Ability ◽  
State Radiation ◽  
Ecological Reserve

scholarly journals THE HYGIENIC ASSESSMENT OF RADIONUCLIDE RELEASE INTO THE SURFACE LAYER OF THE ATMOSPHERE AS A RESULT OF LOSS OF FLY-ASH FROM HOUSEHOLD FURNACES

2017 ◽  
pp. 83-86
Author(s):  
V. N. Bortnovsky ◽  
K. N. Buzdalkin
Keyword(s):  
Fly Ash ◽  
Irradiation Dose ◽  
Exclusion Zone ◽  
Chernobyl Fallout ◽  
Exposure Limit ◽  
Study Results ◽  
State Radiation ◽  
Ecological Reserve ◽  
Radionuclide Release ◽  
Fuel Material

Objective: to evaluate the maximum possible concentrations of radionuclides in the breathing area and the expected inhaled doses of irradiation of rural residents in case when timber harvested in the area of radioactive contamination is used as fuel. Material and methods: The data of the Institute of Radiology on the contamination of the area with radionuclides were used. Mathematical modeling was applied during the study. Results. The expected annual irradiation doses of the population of settlements situated by the border of the Polessky State Radiation Ecological Reserve due to the inhalation of 90Sr and 137Cs with furnace smoke can reach up to 0.27 mSv. The main contribution (96 %) of the expected radiation dose of the population due to stove smoke is made by 90Sr (in the absence of trans-uranium elements). Conclusion. The expected annual irradiation dose from the inhalation way of radionuclide release with the fly-ash from furnace smokes is much higher than from fires in the Chernobyl exclusion zone. The absolute values of the doses from this irradiation way do not exceed the legally established exposure limit (1 mSv per year) and are comparable with the external doses from the Chernobyl fallout.

scholarly journals Spin-one dark matter and gamma ray signals from the galactic center

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
H. Hernández-Arellano ◽  
M. Napsuciale ◽  
S. Rodríguez
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Gamma Ray ◽  
Galactic Center ◽  
Photon Emission ◽  
Scalar Coupling ◽  
Initial State ◽  
Internal Bremsstrahlung ◽  
Resonance Effects ◽  
State Radiation

Abstract In this work we study the possibility that the gamma ray excess (GRE) at the Milky Way galactic center come from the annihilation of dark matter with a (1, 0) ⊕ (0, 1) space-time structure (spin-one dark matter, SODM). We calculate the production of prompt photons from initial state radiation, internal bremsstrahlung, final state radiation including the emission from the decay products of the μ, τ or hadronization of quarks. Next we study the delayed photon emission from the inverse Compton scattering (ICS) of electrons (produced directly or in the prompt decay of μ, τ leptons or in the hadronization of quarks produced in the annihilation of SODM) with the cosmic microwave background or starlight. All these mechanisms yield significant contributions only for Higgs resonant exchange, i.e. for M ≈ MH /2, and the results depend on the Higgs scalar coupling to SODM, gs. The dominant mechanism at the GRE bump is the prompt photon production in the hadronization of b quarks produced in $$ \overline{D}D\to \overline{b}b $$ D ¯ D → b ¯ b , whereas the delayed photon emission from the ICS of electrons coming from the hadronization of b quarks produced in the same reaction dominates at low energies (ω < 0.3 GeV ) and prompt photons from c and τ , as well as from internal bremsstrahlung, yield competitive contributions at the end point of the spectrum (ω ≥ 30 GeV ). Taking into account all these contributions, our results for photons produced in the annihilation of SODM are in good agreement with the GRE data for gs ∈ [0.98, 1.01] × 10−3 and M ∈ [62.470, 62.505] GeV . We study the consistency of the corresponding results for the dark matter relic density, the spin-independent dark matter-nucleon cross-section σp and the cross section for the annihilation of dark matter into $$ \overline{b}b $$ b ¯ b , τ+τ−, μ+μ− and γγ, taking into account the Higgs resonance effects, finding consistent results in all cases.

scholarly journals Collinear expansion for color singlet cross sections

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Markus A. Ebert ◽  
Bernhard Mistlberger ◽  
Gherardo Vita
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Production Cross ◽  
Gluon Fusion ◽  
Building Blocks ◽  
Color Singlet ◽  
Final State ◽  
Beam Function ◽  
Kinematic Limit ◽  
State Radiation

Abstract We demonstrate how to efficiently expand cross sections for color-singlet production at hadron colliders around the kinematic limit of all final state radiation being collinear to one of the incoming hadrons. This expansion is systematically improvable and applicable to a large class of physical observables. We demonstrate the viability of this technique by obtaining the first two terms in the collinear expansion of the rapidity distribution of the gluon fusion Higgs boson production cross section at next-to-next-to leading order (NNLO) in QCD perturbation theory. Furthermore, we illustrate how this technique is used to extract universal building blocks of scattering cross section like the N-jettiness and transverse momentum beam function at NNLO.

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