共查询到20条相似文献,搜索用时 15 毫秒
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In a recent paper BHATTACHARYYA has derived the pion and kaon production spectra in the atmosphere using a form of the primary nucleon energy spectrum of the measurements of GRIGOROV et al. and the interaction model of BUGAEV et al. The sea level muon spectrum derived from these meson spectra agrees with the magnetic spectrograph data of ALLKOFER et al. and AYRE et al. In this report a critical analysis of the paper has been made and some obvious mistakes in the formulation have been pointed out. The formulation of BUGAEV et al. and the data of GRIGOROV at al. have been misinterpreted by BHATTACHARYYA . The corrected results have been properly interpreted in this report. 相似文献
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利用宇宙线直接测量结果对初级宇宙线能谱参数的调整 总被引:1,自引:0,他引:1
由JACEE?,RUNJOB和SOKOL等宇宙线直接测量结果和刚度截断模型,对于1014—1016eV能区的初级宇宙线微分能谱参数进行调整.利用调整后的能谱与选取QGSJET模型的CORSIKA程序进行EAS模拟,同HD,PD谱进行对比研究.采用相同的标准对模拟数据与实验数据进行分析.结果表明,调整后的谱和HD谱的模拟结果与甘巴拉山乳胶室实验结果符合较好,而PD谱的模拟结果与实验结果偏离较大. 相似文献
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A new type of scaling model for p + p → π? + X inclusive reactions, proposed by DAO et al., is applied to derive the sea level muon spectrum. The nucleon spectrum data of Goddard Space Flight Group were taken as input. It is found that the sea level muon spectrum depends explicitly on the average value of the FEYNMAN variable x whose most probable value is estimated to be 0.18. 相似文献
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Physics of Atomic Nuclei - The IceCube Observatory includes both a deep in-ice array of 86 strings of sensors, and a surface array of 81 stations of frozen water tank detectors (IceTop). These... 相似文献
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Physics of Atomic Nuclei - An anomaly in the spectra of galactic cosmic ray nuclei in olivine crystals from meteorites that arises in the charge spectra upon studying crystals situated near the... 相似文献
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怀柔EAS阵列对初级宇宙线“膝”区能谱的测定 总被引:5,自引:2,他引:5
仔细分析了近年来怀柔广延大气簇射阵列记录的65万个大气簇射事例,得到了簇射Size(即荷电总粒子数)谱和1015—5×1016eV能段的初级宇宙线微分能谱.此谱呈明显的、平滑过渡的“膝”样结构,拐点在3×1015eV附近.除了“膝”较平滑不象明野谱那样尖锐拐折而外,怀柔谱在绝对流强和“膝”的位置上都与日本明野组吻合得很好.在银河磁场刚度截止模型框架下,怀柔实验Size谱界定的宇宙线质子谱拐折能量Ec的取值范围在160到240TeV之间. 相似文献
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YANG Hong-Tao LIU Jun GENG Qing-Xi LIU Chang-Qin ZHANG Pin GAO Xiao-Yu ZHA Min JING Gui-Ru JING Cai-Liu ZHU Qing-Qi Cheung T Leung K NG L 《中国物理C(英文版)》2006,30(6):497-500
The lg Ne-Nμ relationship has been studied from 4.4×104 events (total observation time is 2.9×106s)collected from Mt. Liang Wang Array (24.5°N, 102.9°E, 2720m above sea level). In order to study the mass composition at the knee, Monte-Carlo simulations for the EAS development and detection under same event selection criteria as used in the experimental data have been performed. The result shows that the mass composition of primary cosmic rays has no obvious change and the dominant component is light nuclei around the knee. 相似文献
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Y. V. Rao 《Annalen der Physik》1976,488(2):99-102
Calculations have been carried out to investigate the contribution of an increasing total cross section to steepening of the cosmic ray energy spectrum at very high energies (E ? 1012 eV). Our results suggest that increasing total cross section contributes only a part to the steepening of primary energy spectrum at very high energies even if the composition is pure primary iron flux. 相似文献
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Reinhard Schlickeiser 《Fortschritte der Physik》1981,29(3):95-134
The classical production processes for high energy gamma radiation in the interstellar medium are discussed and confronted with recent satellite observations. It is shown that gamma ray data in their present form do not provide definite conclusions on the origin of cosmic rays. Some current ideas on the nature of gamma ray point sources are presented. 相似文献
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《中国物理快报》2017,(12)
The cosmic-ray particles of TeV-regime, outside the solar system are blocked in their way to the Earth, a deficit of particles is observed corresponding to the location of the Sun known as the Sun shadow. The center of the Sun shadow is shifted from its nominal position due to the presence of magnetic fields in interplanetary space,and this shift is used indirectly as a probe to study the solar magnetic field that is difficult to measure otherwise.A detailed Monte Carlo simulation of galactic cosmic-ray propagation in the Earth–Sun system is carried out to disentangle the cumulative effects of solar, interplanetary and geomagnetic fields. The shadowing effects and the displacements results of the Sun shadow in different solar activities are reproduced and discussed. 相似文献
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10TeV宇宙线时间变化研究 总被引:4,自引:0,他引:4
利用羊八井ASγ二期阵列实验数据,分析研究了10TeV宇宙线时间变化,以10.4σ和9.6σ的显著性发现了10TeV宇宙线流强气象效应修正后的半太阳日和太阳日周期变化,没有发现有恒星日变化.同时发现10TeV宇宙线流强有7天左右周期变化的迹象. 相似文献
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Physics of Atomic Nuclei - Estimations of some geometrical and bulk parameters are presented for the matter produced in various type collisions with ultra-high energy cosmic ray (UHECR) particles.... 相似文献
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The new scaling variable model explains the scaling behavior of p + p → p + X inclusive reactions at ISR energies. The cosmic antiproton spectrum has been derived from this model using the primary proton spectrum of RYAN et al. The derived antiproton-proton flux ratio lies within the upper limit value of BOGOMOLOV et al. and CHEN. The estimated antiproton spectrum follows the relation where the antiproton energy Ep is expressed in GeV and the intensity in units (cm2 sec sr GeV)?1. 相似文献
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215 blocks of K6,K7,K8 lead emulsion chambers on Mt.Kanbala are carefully scanned,and a total of 111 muon events are found with zenith angle M(=tgθ)>2.5.The energy of muon showers are determined by saddle-shape curves.The intensity of muon,the energy spectrum and the zenith angle distribution of muon showers on the altitude of 5500m above sea level are shown in the energy region Eμ>2TeV.Meanwhile the simulation calculation is done for the behaviour of muon inside the emulsion chamber,simulation results are basically in agreement with the experiment. 相似文献
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宇宙线超高能相互作用的QCD部分子模型产生器 总被引:1,自引:1,他引:0
在pQCD的部分子模型和独立碎裂方案的部分子强子化模型基础上,建立了用于超高能宇宙线与空气核相互作用的产生器.通过拟合PP散射和e+e-对撞实验数据来决定产生器中的参数.再现了从s=546GeV到1800GeVpp散射中喷注的产生和从s=14GeV到91GeV e+e-对撞等实验的基本特征,并外推到≤22TeV的超高能区. 相似文献