scholarly journals Compton scattering fromC12using tagged photons in the energy range 65–115 MeV

2014 ◽  
Vol 89 (3) ◽  
Author(s):  
L. S. Myers ◽  
K. Shoniyozov ◽  
M. F. Preston ◽  
M. D. Anderson ◽  
J. R. M. Annand ◽  
...  
2019 ◽  
pp. 26-37
Author(s):  
D.D. Burdeinyi ◽  
J. Brudvik ◽  
V.B. Ganenko ◽  
K. Hansen ◽  
K. Fissum ◽  
...  

The asymmetry of the cross section of the 12C(γ,p0)11B and 12C(γ,p1)11B reactions has been measured in the energy range 40...55MeV using linearly polarized tagged photons of the MAX-lab facility. The asymmetry of the process 12C(⃗γ,p0)11B is Σ ≈ 0.85, that implies one-particle reaction mechanism. The asymmetry of the reaction 12C(⃗γ,p1)11B is smaller, Σ ≈ 0.6...0.7, that may be due to the stronger relative contribution of the 2h−1p mechanism to the dominant one-particle reaction mechanism.


Author(s):  
Yoshiki Yamaguchi ◽  
Souichiro Kawaguchi ◽  
Hidetaka Arimura ◽  
Junji Morishita ◽  
Masafumi Ohki ◽  
...  

1980 ◽  
Vol 298 (2) ◽  
pp. 103-111 ◽  
Author(s):  
J. Arends ◽  
J. Eyink ◽  
H. Hartmann ◽  
A. Hegerath ◽  
B. Mecking ◽  
...  

1992 ◽  
Vol 539 (2) ◽  
pp. 263-275 ◽  
Author(s):  
A.S. Iljinov ◽  
D.I. Ivanov ◽  
M.V. Mebel ◽  
V.G. Nedorezov ◽  
A.S. Sudov ◽  
...  
Keyword(s):  

2010 ◽  
Vol 19 (05n06) ◽  
pp. 1177-1182
Author(s):  
M. MANGANARO ◽  
V. BELLINI ◽  
J. P. BOCQUET ◽  
L. CASANO ◽  
A. D'ANGELO ◽  
...  

The γp → η′p reaction was studied near the threshold, in the 1.44 GeV > Eγ < 1.55 GeV energy range with the tagged photons of the former GRAAL experiment. The two neutral decays γγ(Γi/Γ = 2.10 ± 0.12%) and π0π0η(Γi/Γ = 20.7 ± 1.2%) were analized and preliminary results of the beam asymmetry were extracted together with the invariant masses.


1978 ◽  
Vol 141 (4) ◽  
pp. 364-378 ◽  
Author(s):  
K. Toshioka ◽  
M. Chiba ◽  
S. Kato ◽  
K. Sugano ◽  
K. Ukai ◽  
...  

2013 ◽  
Vol 84 (11) ◽  
pp. 113302 ◽  
Author(s):  
S. Cipiccia ◽  
S. M. Wiggins ◽  
D. Maneuski ◽  
E. Brunetti ◽  
G. Vieux ◽  
...  

2014 ◽  
Vol 54 (3) ◽  
pp. 177-182 ◽  
Author(s):  
Wiebke Eikmann ◽  
Jörn Wilms ◽  
Randall K. Smith ◽  
Julia C. Lee

The spectral shape of an X-ray source strongly depends on the amount and distribution of the surrounding material. The spectrum of a primary source which is located in an optically thin medium with respect to Compton scattering is mainly modified by photo absorption in the lower energy range and is almost unaltered above ~ 10 keV. This picture changes when the source is obscured by gas exceeding hydrogen column densities of ~ 10<sup>24</sup> cm<sup>−2</sup>. At this degree of absorption it is likely that photons are scattered at least twice before leaving the medium. The multiple scatterings lead to a lack of photons in the high energy range of the resulting spectrum as well as to an accumulation of photons at moderate energies forming the so-called Compton-bump. The shape of the fluorescent lines also changes since scattered line photons form several Compton-shoulders which are very prominent especially for Compton-thick sources. Using a Monte Carlo method, we demonstrate the importance of Compton scattering for high column densities. For that purpose, we compare our results with existing absorption models that do not consider Compton scattering. These calculations will be implemented in a prospective version of the <em>tbabs</em> absorption model including an analytic evaluation of the strength of the fluorescent lines.


1993 ◽  
Vol 19 (9) ◽  
pp. L139-L142 ◽  
Author(s):  
F V Adamian ◽  
A Yu Buniatian ◽  
G S Frangulian ◽  
P I Galumian ◽  
V H Grabsky ◽  
...  

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