استفاده ازساختار زمانی بهمن های گسترده هوایی جهت تفکیک جرمی پرتو های کیهانی

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

دانشکده فیزیک، دانشگاه سمنان، سمنان، ایران

10.22055/jrmbs.2020.15333

چکیده

در کار حاضر پرتوهای کیهانی پروتون و آهن در انرژی1017 الکترون ولت و زاویه های سرسویی 20 تا 45 درجه با استفاده از کُدCORSIKA و مدل های اندرکنشی انرژی های بالا (QGSJETII04 )و مدل های اندرکنشی انرژی پایین GHEISHA2002d و در ارتفاع 1200 متر از سطح دریا (تهران) شبیه سازی شده اند. و با ثبت زاویه سمتی ، مکان و زمان رسیدن ذرات ثانویه نتایج شبیه سازی تحلیل و زمان خیز (rise time) ذرات ثانویه ( الکترون ها و میون ها) محاسبه شده است . با بررسی وابستگی زمان خیز به فاصله از محور بهمن و زاویه سمتی ما نشان داده ایم در توزیع سمتی زمان خیز عدم تقارنی وجود دارد که میتواند برای تفکیک جرمی پرتوهای اولیه مورد استفاده قرار بگیرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Using the time structure of extensive air showers for cosmic ray mass discrimination

نویسندگان [English]

  • Gohar Rastegarzadeh
  • Hossein Abbasnejad
Faculty of Physics, Semnan University, Semnan, Iran
چکیده [English]

In this work, using CORSIKA simulation code with QGSJETII04 and GHEISHA2002d as high and low energy interaction models respectively, proton and iron cosmic ray primaries with 1017 eV energy and 20-45o zenith angle are simulated at the Tehran observation level (1200m above sea level). By using azimuth angle, arrival time and local coordinates of the muon and electron secondaries, rise times of received pulses are calculated. By investigating on the rise time as a function of the distance to the Shower Core for different azimuth angle, It is shown that there is an azimuthal asymmetry in the rise time distribution which can be used for mass discrimination of primary cosmic rays.

کلیدواژه‌ها [English]

  • Cosmic ray
  • extensive air shower
  • Rise time azimuthal asymmetry
  • Cosmic ray mass discrimination
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