A subroutine package for fast simulation of air showers and response of surface detectors

Abstract
A subroutine package, GENAS, is presented which enables the user to generate air showers induced by gamma rays, protons, or heavy primaries ranging from 10^(13)eV to 10^(20)eV. GENAS is capable of producing air showers very rapidly while keeping the quality of the showers as if they were produced by the full Monte Carlo method. It includes the response of detectors consisting of a plastic scintillator under thin iron and an optional lead sheet. GENAS offers a means for investigating sur...

Title of program: GENAS V2.1
Catalogue Id: ABZN_v1_0

Nature of problem
Point sources emitting high energy gamma rays (>10^13 eV) are normally studied with surface air shower arrays which usually employ plastic scintillator detectors. We need a reliable Monte-Carlo code to simulate air shower observation, by which simulation a quantitative comparsion with experiment should be possible for knowing or improving array performance. Every quantity needed for the simulation is, in principle, a function of the primary particle type, energy, zenith angle, age of the shower ...

Versions of this program held in the CPC repository in Mendeley Data
ABZN_v1_0; GENAS V2.1; 10.1016/0010-4655(91)90053-N

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

摘要
本文介绍了一款子程序包GENAS，可用于生成由γ射线、质子或能量范围为10^13 eV至10^20 eV的重原初粒子诱导产生的空气簇射。GENAS能够以极快的速度生成空气簇射，且簇射品质可媲美全蒙特卡洛（Monte Carlo）方法生成的结果。该程序包含了由薄铁层下方的塑料闪烁体与可选铅板组成的探测器响应模型，可为研究……

程序名称：GENAS V2.1
目录编号：ABZN_v1_0

问题性质
通常采用表面空气簇射阵列研究发射高能γ射线（>10^13 eV）的点源，这类阵列一般搭载塑料闪烁体探测器。我们需要一款可靠的蒙特卡洛代码来模拟空气簇射观测过程，借此可实现与实验的定量对比，从而了解或优化阵列性能。原则上，模拟所需的所有物理量均为原初粒子类型、能量、天顶角以及簇射年龄……的函数。

存放在Mendeley数据中的CPC库内的该程序版本：ABZN_v1_0；GENAS V2.1；10.1016/0010-4655(91)90053-N

本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2018）