A measurement of the energy spectra and relative abundance of the cosmic-ray H and He isotopes over a broad energy range

1983 ◽  
Vol 275 ◽  
pp. 391 ◽  
Author(s):  
W. R. Webber ◽  
S. M. Yushak
Keyword(s):  
Energy Range ◽  
Relative Abundance ◽  
Cosmic Ray ◽  
Energy Spectra ◽  
Broad Energy Range ◽  
He Isotopes ◽  
Broad Energy

scholarly journals Compton-Thick AGN in the NuSTAR ERA VII. A joint NuSTAR, Chandra, and XMM-Newton Analysis of Two Nearby, Heavily Obscured Sources

2021 ◽  
Vol 922 (2) ◽  
pp. 159
Author(s):  
A. Traina ◽  
S. Marchesi ◽  
C. Vignali ◽  
N. Torres-Albà ◽  
M. Ajello ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Energy Range ◽  
Active Galactic Nuclei ◽  
Column Density ◽  
Galactic Nuclei ◽  
Seyfert Galaxies ◽  
Line Of Sight ◽  
Broad Energy Range ◽  
Larger Sample ◽  
Broad Energy

Abstract We present the joint Chandra, XMM-Newton, and NuSTAR analysis of two nearby Seyfert galaxies, NGC 3081 and ESO 565-G019. These are the only two having Chandra data in a larger sample of 10 low-redshift (z ≤ 0.05), candidates Compton-thick (CT) Active Galactic Nuclei selected in the 15–150 keV band with Swift-BAT that were still lacking NuSTAR data. Our spectral analysis, performed using physically motivated models, provides an estimate of both the line-of-sight (l.o.s.) and average (N H,S ) column densities of the two torii. NGC 3081 has a Compton-thin l.o.s. column density N H,z = [0.58–0.62] × 1024 cm−2, but the N H,S , beyond the CT threshold (N H,S = [1.41–1.78] × 1024 cm−2), suggests a “patchy” scenario for the distribution of the circumnuclear matter. ESO 565-G019 has both CT l.o.s. and N H,S column densities (N H,z > 2.31 × 1024 cm−2 and N H,S > 2.57 × 1024 cm−2, respectively). The use of physically motivated models, coupled with the broad energy range covered by the data (0.6–70 keV and 0.6–40 keV, for NGC 3081 and ESO 565-G019, respectively) allows us to constrain the covering factor of the obscuring material, which is C TOR = [0.63–0.82] for NGC 3081, and C TOR = [0.39–0.65] for ESO 565-G019.

scholarly journals Integral Cross Sections for Electron–Magnesium Scattering Over a Broad Energy Range (0–5000 eV)

2018 ◽  
Vol 47 (4) ◽  
pp. 043104 ◽  
Author(s):  
R. P. McEachran ◽  
F. Blanco ◽  
G. García ◽  
P. W. Stokes ◽  
R. D. White ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Broad Energy Range ◽  
Broad Energy

scholarly journals Theoretical study on positron scattering by benzene over a broad energy range

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Alessandra Souza Barbosa ◽  
Francisco Blanco ◽  
Gustavo García ◽  
M. H. F. Bettega
Keyword(s):  
Energy Range ◽  
Theoretical Study ◽  
Positron Scattering ◽  
Broad Energy Range ◽  
Broad Energy

Neutron spectrum over broad energy range in critical pile

1978 ◽  
Vol 44 (3) ◽  
pp. 294-296
Author(s):  
M. Ya. Bankrashkova ◽  
V. N. Bogomolov ◽  
V. S. Gal'tsov ◽  
V. N. Gurin ◽  
V. S. Dmitrieva ◽  
...  
Keyword(s):  
Energy Range ◽  
Neutron Spectrum ◽  
Broad Energy Range ◽  
Broad Energy

scholarly journals Cross sections for electron scattering from thiophene for a broad energy range

2018 ◽  
Vol 149 (3) ◽  
pp. 034304 ◽  
Author(s):  
Alexandra Loupas ◽  
Ana. I. Lozano ◽  
Francisco Blanco ◽  
Jimena D. Gorfinkiel ◽  
Gustavo García
Keyword(s):  
Energy Range ◽  
Electron Scattering ◽  
Cross Sections ◽  
Broad Energy Range ◽  
Broad Energy

Low-energy cosmic-ray heavy nuclei during the time of solar minimum

1968 ◽  
Vol 46 (10) ◽  
pp. S598-S600
Author(s):  
E. Tamai ◽  
M. Tsubomatsu ◽  
K. Ogura
Keyword(s):  
Energy Range ◽  
Solar Minimum ◽  
Cosmic Ray ◽  
Low Energy ◽  
Energy Spectra ◽  
Solar Modulation ◽  
Atmospheric Depth ◽  
Heavy Nuclei ◽  
Multiply Charged ◽  
Α Particles

Nuclear emulsions were exposed at 2.3 g cm−2 atmospheric depth over Fort Churchill in 1965. These emulsions have been examined for the tracks of multiply-charged [Formula: see text] nuclei, with emphasis being paid particularly to those particles that stopped in the emulsions. Differential energy spectra of α particles and [Formula: see text], [Formula: see text]and [Formula: see text] nuclei were obtained in the energy interval 60–550 MeV/nucleon. They represent experimental results during the period when solar modulation effects were at a minimum. The fluxes of α particles and L, M, and H nuclei for energy intervals of 60–170, 100–400, 100–525, and 140–550 MeV/nucleon were found to be 20.9 ± 1.2, 2.4 ± 0.4, 4.8 ± 0.6, and 2.5 ± 0.4 particles m−2 sr−1 s−1, respectively. The results also show that the L/M and H/M ratios at the top of the atmosphere were 0.56 ± 0.16 and 0.34 ± 0.13 respectively, in the energy range from 140 to 350 MeV/nucleon. These values are appreciably greater than those observed at higher energies.

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