Influence of multiple compton scattering on the spectrum of soft diffuse gamma rays at balloon altitudes

1974 ◽  
Vol 30 (2) ◽  
pp. L17-L20 ◽  
Author(s):  
C. Moyano ◽  
V. Sch�nfelder
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Multiple Compton Scattering

Angular Distribution of Multiple Compton Scattered Gamma Rays in Carbon

2013 ◽  
Vol 770 ◽  
pp. 346-349
Author(s):  
Kittipong Siengsanoh ◽  
Pruittipol Limkitjaroenporn ◽  
Pichet Limsuwan ◽  
Weerapong Chewpraditkul ◽  
Jakrapong Kaewkhao
Keyword(s):  
Angular Distribution ◽  
Compton Scattering ◽  
Gamma Rays ◽  
Single Photon ◽  
Full Energy Peak ◽  
Gamma Energy ◽  
Full Energy ◽  
Multiple Compton Scattering ◽  
Scattered Energy ◽  
Energy Peak

This work studied the angular distribution of multiple Compton scattering of gamma energy 662 keV, obtained from 137Cs source. The gamma rays are incident on carbon scatterer of varying the scattering angles. The phenomenon of multiple Compton scattering has been successfully observed using NaI(Tl) scintillation detector. The energy spectra of the detected photons are observed as a long tail to the single-photon Compton line on the lower side of the full-energy peak in the recorded scattered energy spectrum. The full-energy peak corresponding to singly scattered events is reconstructed analytically and observe that the number of multiply scattered events, having same energy as in the singly scattered distribution.

scholarly journals Measurements of Neutrons from Photonuclear Reactions Using Laser Compton Scattering Gamma Rays

2018 ◽  
Vol 13 (0) ◽  
pp. 2404066-2404066
Author(s):  
Shuji MIYAMOTO ◽  
Akinori TAKEMOTO ◽  
Masashi YAMAGUCHI ◽  
Kento SUGITA ◽  
Satoshi HASHIMOTO ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Photonuclear Reactions ◽  
Laser Compton Scattering

scholarly journals Energy Calibration of the NewSUBARU Storage Ring for Laser Compton-Scattering Gamma Rays and Applications

2014 ◽  
Vol 61 (3) ◽  
pp. 1252-1258 ◽  
Author(s):  
Hiroaki Utsunomiya ◽  
Tatsushi Shima ◽  
Keiji Takahisa ◽  
Dan Mihai Filipescu ◽  
Ovidiu Tesileanu ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Storage Ring ◽  
Gamma Rays ◽  
Energy Calibration ◽  
Laser Compton Scattering

scholarly journals Gamma Rays from Compton Scattering in the Jets of Microquasars: Application to LS 5039

2006 ◽  
Vol 643 (2) ◽  
pp. 1081-1097 ◽  
Author(s):  
Charles D. Dermer ◽  
Markus Bottcher
Keyword(s):  
Compton Scattering ◽  
Gamma Rays

scholarly journals Scintillator Pixel Detectors for Measurement of Compton Scattering

2019 ◽  
Vol 4 (1) ◽  
pp. 24 ◽  
Author(s):  
Mihael Makek ◽  
Damir Bosnar ◽  
Luka Pavelić
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Environment Monitoring ◽  
Silicon Photomultiplier ◽  
Pixel Detectors ◽  
Coincidence Mode ◽  
Fundamental Research ◽  
Cost Efficient ◽  
Electronic Channels ◽  
Coincidence Time

The Compton scattering of gamma rays is commonly detected using two detector layers, the first for detection of the recoil electron and the second for the scattered gamma. We have assembled detector modules consisting of scintillation pixels, which are able to detect and reconstruct the Compton scattering of gammas with only one readout layer. This substantially reduces the number of electronic channels and opens the possibility to construct cost-efficient Compton scattering detectors for various applications such as medical imaging, environment monitoring, or fundamental research. A module consists of a 4 × 4 matrix of lutetium fine silicate scintillators and is read out by a matching silicon photomultiplier array. Two modules have been tested with a 22 Na source in coincidence mode, and the performance in the detection of 511 keV gamma Compton scattering has been evaluated. The results show that Compton events can be clearly distinguished with a mean energy resolution of 12.2% ± 0.7% in a module and a coincidence time resolution of 0 . 56 ± 0 . 02 ns between the two modules.

Photo-nuclear Science using laser Compton scattering gamma-rays in JAEA

2008 ◽  
Author(s):  
Takehito Hayakawa ◽  
Ryoichi Hajima ◽  
Sergei V. Bulanov ◽  
H. Daido
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Nuclear Science ◽  
Laser Compton Scattering

scholarly journals A MODEL-INDEPENDENT METHOD TO STUDY DARK MATTER INDUCED LEPTONS AND GAMMA RAYS

2012 ◽  
Vol 27 (35) ◽  
pp. 1250206 ◽  
Author(s):  
MINGXING LUO ◽  
LIUCHENG WANG ◽  
GUOHUAI ZHU
Keyword(s):  
Dark Matter ◽  
Compton Scattering ◽  
Gamma Rays ◽  
Particle Physics ◽  
Cosmic Ray ◽  
Propagation Model ◽  
Strong Constraint ◽  
Inverse Compton Scattering ◽  
Inverse Compton ◽  
Model Independent

By using recent data, we directly determine the dark matter (DM)-induced e± spectrum at the source from experimental measurements at the earth, without reference to specific particle physics models. The DM-induced gamma rays emitted via inverse Compton scattering are then obtained in a model-independent way. However, the results depend on the choice of the astrophysical e± background, which is not reliably known. Nevertheless, we calculate, as an illustration, the fluxes of gamma rays from the Fornax cluster in the decaying DM scenario with various astrophysical e± backgrounds. Without any assumptions on details of the DM model, the predictions turn out to be either in disagreement with or only marginally below the upper limits measured recently by the Fermi-LAT Collaboration. In addition, these DM-induced ICS gamma rays in the GeV range are shown to be almost independent of choices of cosmic ray propagation model and of DM density profile, when a given astrophysical e± background is assumed. This provides a strong constraint on decaying DM scenario as the gamma rays may be produced in other processes besides inverse Compton scattering, such as the bremsstrahlung and neutral pion decays.

Sign in / Sign up

Export Citation Format

Share Document