Cosmic-Ray Spectra and Composition in the Energy Range of 10-1000 TeV per Particle Obtained by the RUNJOB Experiment-猫眼课题宝

DOI：

10.1086/432715

发表时间：

2005-07

期刊：

The Astrophysical Journal Letters

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

V. A. Derbina;V. Galkin;M. Hareyama;Y. Hirakawa;Y. Horiuchi;M. Ichimura;N. Inoue;E. Kamioka;T. Kobayashi;V. Kopenkin;S. Kuramata;A. Managadze;H. Matsutani;N. P. Misnikova;R. Mukhamedshin;S. Nagasawa;R. Nakano;M. Namiki;M. Nakazawa;H. Nanjo;S. N. Nazarov;S. Ohata;H. Ohtomo;V. Osedlo;D. Oshuev;P. Publichenko;I. V. Rakobolskaya;T. Roganova;C. Saito;G. Sazhina;H. Semba;T. Shibata;D. Shuto;H. Sugimoto;R. Suzuki;L. Sveshnikova;V. M. Taran;N. Yajima;T. Yamagami;I. Yashin;E. A. Zamchalova;G. Zatsepin;I. S. Zayarnaya

这是一份关于宇宙射线光谱和成分的完整报告，是由1995年至1999年间从堪察加半岛发射的10个长时间气球上的乳剂室获得的。这些战役的总暴露量达575平方米小时，平均飞行高度约32公里。我们给出了两种轻元素（质子和氦核）和三种重元素族（CNO、NeMgSi和Fe）能谱的最终结果，这些能谱覆盖了10-1000 TeV粒子-1的高能区域。我们还提出了次级/初级比、全粒子谱和初级宇宙射线的平均质量。我们发现我们的质子谱与其他结果一致，但氦成分的强度几乎是JACEE和SOKOL的一半。在10-500 TeV核子-1能量范围内，这两种元素的光谱斜率几乎是平行的，其值为2.7 ~ 2.8。RUNJOB重组分谱与CRN（芝加哥群）较低能量谱的外推结果一致，随能量单调递减。我们还观察到二次组分，如LiBeB基团和亚fe基团，并在TeV核子-1区给出了二次/一次比。我们确定了20-1000 TeV粒子1能量区域的全粒子谱和初级宇宙射线的平均质量。RUNJOB的全粒子谱强度比JACEE和SOKOL的谱强度低40% ~ 50%，而RUNJOB的平均质量在~1 PeV以内几乎保持不变。

This is a full report on the cosmic-ray spectra and composition obtained by the emulsion chambers on board 10 long-duration balloons, launched from Kamchatka between 1995 and 1999. The total exposure of these campaigns amounts to 575 m2 hr, with an average flight altitude of ~32 km. We present final results on the energy spectra of two light elements, protons and helium nuclei, and on those of three heavy-element groups, CNO, NeMgSi, and Fe, covering the very high energy region of 10-1000 TeV particle-1. We additionally present the secondary/primary ratio, the all-particle spectrum, and the average mass of the primary cosmic rays. We find that our proton spectrum is in good agreement with other results, but the intensity of the helium component is nearly half that obtained by JACEE and SOKOL. The slopes of the spectra of these two elements obtained from RUNJOB data are almost parallel, with values of 2.7-2.8 in the energy range of 10-500 TeV nucleon-1. RUNJOB heavy-component spectra are in agreement with the extrapolation from those at lower energies obtained by CRN (Chicago group), monotonically decreasing with energy. We have also observed secondary components, such as the LiBeB group and the sub-Fe group, and present the secondary/primary ratio in the TeV nucleon-1 region. We determine the all-particle spectrum and the average mass of the primary cosmic rays in the energy region of 20-1000 TeV particle-1. The intensity of the RUNJOB all-particle spectrum is 40%-50% less than those obtained by JACEE and SOKOL, and the RUNJOB average mass remains almost constant up to ~1 PeV.

Cosmic-Ray Spectra and Composition in the Energy Range of 10-1000 TeV per Particle Obtained by the RUNJOB Experiment

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