利用羊八井广延大气簇射阵列探测来自壳型超新星遗迹G40.5-0.5的TeV Gamma射线发射

利用羊八井广延大气簇射阵列从2000年10月到2001年9月的数据,对壳型超新星 遗迹G40.5-0.5可能的TeV gamma射线发射进行了探测. 用对扩展源的二维分析方法发现一个最高超出为4.4σ的天区,EGRET不明源GeV J1907+0557非常接近 这一最高超出天区的中心.     

Two Bursts of Ultra-High Energy Gamma Rays Detected by the Baksan Air Shower Array

Physics of Atomic Nuclei - During a Cygnus X-3 campaign many years ago the Carpet air shower array of the Baksan Neutrino Observatory had recorded two bursts from two different sources: from the...     

Initial Search for Triggered Gamma Emission from 178Hfm2 Using the YSU Miniball Array

Experiments with the long-lived, high-K isomer ¹⁷⁸Hf^m2 have been recognized as intriguing tests of multi-quasiparticle state structures and their interactions with external radiation. A triggered release of the energy stored by this isomer, 2.5 MeV per nucleus or 1.2 GJ/gram, in the form of a gamma-ray burst might prove valuable for numerous applications. The observation of “accelerated” decay of ¹⁷⁸Hf^m2 during irradiation by 90-keV bremsstrahlung has already been reported, but with poor statistical accuracy due to the experimental approach. That approach employed single Ge detectors to seek increases in the areas of peaks at energies corresponding to transitions in the spontaneous decay of the isomer. The need for better quality data to confirm those results has motivated the development of improved detection concepts. One such concept was utilized here to perform an initial search for low-energy (<20 keV) triggered gamma emission from ¹⁷⁸Hf^m2 using the YSU miniball detector array. This revised version was published online in August 2006 with corrections to the Cover Date.     

New Method for Estimating the Energy of Extensive Air Showers from Signals of Ground-Based Detectors of the Yakutsk Extensive Air Shower Array

A new method has been proposed for estimating the energy of inclined extensive air showers from signals of ground-based scintillation detectors of the Yakutsk extensive air shower array that are located at a distance of 600 m from the shower axis in the plane of the array and from the calculations of these signals within two hadron interaction models. New estimates of the energy have been obtained for 116 showers detected in different years. It has been shown that the energy spectra of particles of primary cosmic radiation measured at the Yakutsk array are in agreement with world data.