STUDY OF COSMIC GAMMA RAYS AND NUCLEAR INTERACTIONS WITH AIR SHOWERS OBSERVED AT MT.CHACALTAYA

为了寻找来自点源的伽马射线和扩散的伽马射线，我们正在观测10^&14；EV以上的无强风空气骤雨。对不同sources(ScoX-1.VelaX-1.SS433.V1223SGR.SN1987a.etc.).点方向的无强风簇射进行了物相分析1986年2月至1987年3月，我们在查卡尔塔亚山进行了观测，没有发现这些来源有任何明显的过剩。然而。我们发现从1986年5月下半月的ScoX-1开始出现了短暂的过剩。根据相分布的X^2检验。不均匀概率为7.05×10~(-5)。对扩散伽马射线的初步结果表明，与其他方向相比，来自银河系中心的无强子空气簇射的过剩约为3%。为了与我们用混合方法(空气簇射阵列+乳胶室)观测到的乳状液数据进行比较，用三维蒙特卡罗方法计算了气簇核中能量大于1TeV的强子。这些计算是根据CKP模型和由加速器数据外推的高多重数模型进行的。我们对高能强子的能谱和电流变分布的实验结果与目前的计算结果进行了比较。

We are observing the hadronless air showers above 10^<14>eV in order to search gamma-rays from point sources and diffused gamma-rays. phase analysis has been done on hadronless air showers from directions of various point sources(ScoX-1.VelaX-1.SS433.V1223SGR.SN1987a.etc.). observed at Mt.Chacaltaya from 1986 Feb. to 1987 Mar. We could not find any significant excess for these sources. However. we have found a short period excess from ScoX-1 in the latter half of May of 1986. According to the X^2 test for the phase distribution. the probability of the ununiformity is 7.05x10^<-5>. Preliminary results on diffused gamma-rays shows that the excess of hadronless air showers from galactic center is about 3% compared with other directions.Hadrons with energies above 1TeV in air shower cores were caluculated with three-dimensional Monte Carlo simulation in order to compare with our emulsion data observed with the hybrid method(air shower array + emulsion chamber). These caluculations have been done by a high multipicity model according to CKP model and by a model extrapolated from accelerator data. Our experimental results on energy spectrum and ER distributions of high energy hadrons are compared with ones expected from the present calculations.