It may be presumed that the activity of gamma rays results in excitations of its molecules and creation of free electrons and ions that migrate through the polymer network till they are trapped somewhere, leaving deficient regions. These electronic and ionic configurations cause the changes in the ...
Properties of Gamma Rays Gamma Radiation Equation Gamma Rays Uses Health Effects of Gamma Radiation Lesson Summary Frequently Asked Questions What are 3 uses for gamma rays? Gamma radiation from cosmic rays is detected, measured, and studied by astronomers. Gamma radiation within the medical sciences...
accepted Abstract. We present an analysis of the X-ray absorp- tion properties of 6 gamma-ray burst (GRB) afterglows measured with BeppoSAX. Between 8 hrs and 20 hrs af- ter the initial GRB trigger, individual spectra can be de- scribed by a power-law with a photon index of ∼2 an...
We argue that this result provides indirect evidence for jet propagation inside a massive star, and suggests the existence of recollimation shocks that take place close to this radius. 展开 关键词: gamma rays: stars hydrodynamics methods: data analysis radiation mechanisms: thermal radiative transfer...
In this paper, a method is proposed to determine the basic properties of $\gamma$-ray loud blazars, among them the central black hole mass, M, the Doppler factor, $\delta$, the propagation angle of the $\gamma$-rays with respect to the symmetric axis of a two-temperature accretion disk...
The detection of short GRBs with small Lorentz factors is statistically disfavored, suggesting a possible reason for the absence of soft short bursts in the duration-hardness diagram. 展开 关键词: gamma rays : bursts hydrodynamics DOI: 10.1086/504580 被引量: 24 ...
The relaxation lengths and the buildup factors for gamma‐rays were calculated. The results suggest that desert sand provides reasonable protection against gamma radiation.doi:10.1080/00207239808711171El‐EnanyN.Taylor & Francis GroupInternational Journal of Environmental Studies...
High energy gamma-ray production in heavy-ion reactions The doubly-differential cross section for the production of gamma-rays with energies larger than 20 MeV has been measured in the reaction 40Ar+ 197 Au at 30 MeV/u incident energy. It is found that the spectra are thermal-like, the emi...
The obtained PVA/PEG thin films have been irradiated with gamma rays with doses ranging from 1.5 to 20 Gy. The resultant effect of gamma irradiation on the thermal properties of PVA/PEG has been investigated using thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The ...
The source of terrestrial gamma-ray flashes (TGFs) has been an active area of research since their discovery by Compton Gamma-Ray Observatory/Burst and Transient Source Experiment in 1994. These intense bursts of gamma rays originate within thunderclouds via the rapid production of relativistic run...