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luminosity-peak energy relation in the decay phases of gamma-ray burst pulses

science China(Physics,Mechanics & Astronomy) 2010年第1期53卷 163-170页

作者： lu ruijing & liang enwei physical science & technology college, guangxi university, nanning 53.004, China 1. physical science & technology {3. Guangxi University Nanning 530004 China

Using time-resolved spectral data for a sample of 3. pulses in 27 bright GRBs detected with CGRO/BATSE, we investigate the luminosity-peak energy relation (L-E p relation) in the decay phases of these pulses. A tight L-E p relation is found for most of the pulses, but its power law index is various among pulses, which is normally distributed at 1.84±0.60(1σ) for the pulses in our sample, roughly consistent with the L-E p relation within a GRB and the isotropic gamma-ray energy-E p relation among GRBs. The large scatter of the power law index cannot be explained with both the statistical or observational effects and it may be an intrinsic feature, indicating that no universal L-E p relation would be expected among GRBs/pulses. This may strongly weaken the cosmological use of this relation.

关键词： gamma ray bursts observations statistical luminosity-peak energy relation

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The flux-E_p relation within GRB060218 in comparison with typical GRB pulses

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science China(Physics,Mechanics & Astronomy) 2010年第S1期53卷 78-81页

作者： DONG Wei,liang enwei & lu {3. {3. science & technology college,guangxi university,nanning 53.004,China guangxi Univ Phys Sci & Technol Coll Nanning 530004 Peoples R China

The prompt gamma-ray/X-ray emission of gamma-ray burst(GRB) 060218 was simultaneously observed by the Burst Alert Telescope(BAT) and X-ray Telescope(XRT) onboard *** peak energy of the joint νfν spectrum(Ep) clearly evolves with time from tens of keV to-1 keV,crossing both the BAT and XRT *** best fit yields log Ep=(4.61± 0.23.+(-1.29±0.08) log t,with a correlation coefficient of 0.98 and a chance probability of plux(F)in the 0.01-10 4 keV band,and find that its F-Ep relation,with a power-law index of 0.3.,is much shallower than that observed in typical GRB *** of this shallowness is presented.

关键词： gamma-ray bursts gamma-rays observations high-energy phenomenon radiation mechanism

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Gamma-ray bursts in the Swift-Fermi era:Confronting data with theory

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science China(Physics,Mechanics & Astronomy) 2010年第S1期53卷 14-23页

作者： liang enwei physical {3. & technology college,guangxi university,nanning 53.004,China guangxi Univ Phys Sci & Technol Coll Nanning 530004 Peoples R China

With the prompt slewing capability of the X-ray and UV-optical telescopes onboard the Swift mission and with the gamma-ray large area telescope onboard the Fermi mission,gamma-ray bursts(GRBs) are now accessible in a full time window and in all electromagnetic wavelengths for the *** observational breakthroughs have been made in recent years.I present here a brief review of some observational breakthroughs with the two missions,focusing on how these breakthroughs have revolutionized our understanding of the nature of this phenomenon and puzzles as well as challenges of confronting the conventional models with data.

关键词： radiation mechanism gamma rays bursts high energy phenomenon

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Side-On transition radiation detector(TRD)based on THGEM

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Radiation Detection technology and Methods 2020年第3期4卷 257-262页

作者： Xiwen Liu Bo Huang Huanbo Feng Hongbang Liu Wenjin Xie Xuefeng Huang Shuai Chen Jianyu Gu Xiaochuan Xie Jin Zhang Qian Liu Yongbo Huang Yongwei Dong Ming Xu enwei liang guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanningChina university of Chinese Academy of sciences BeijingChina The Institute of High Energy Physics of the Chinese Academy of sciences BeijingChina

Purpose The characteristic that TR energy is proportional to the Lorentz factor provides a way for energy *** High Energy cosmic-Radiation Detection calorimeter can be calibrated in space by the TRD in the *** In order to make the TR signal stand out from the energy loss signal,a new prototype of TRD called Side-On TRD with THGEM has been ***-on TRD uses side window incidence and strip readout to reduce the ionization energy registered in the channel where the TR photons are located,which is supposed to improve the detection efficiency of *** and conclusion The Side-On TRD has been tested at CERN SPS and found the experimental results are significant.

关键词： Transition radiation detector THGEM Test beam experiment Radiator

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