Extensive air showers at 5200 metres above sea level and search for high energy primary gamma rays by g clark and others pontificiae academiae scientiarum scripta varia 25 g clark on amazoncom free shipping on qualifying offers. Extensive air showers are a very unique phenomenon in the more than six decades since their discovery by auger and collaborators we have learned a lot about these extremely energetic events and gained deep insight into high energy phenomena particle physics and astrophysics in this tutorial. Other articles where extensive air shower is discussed cosmic ray very high energy cosmic rays be detected only through the extensive air showers eass that they produce in the atmosphere an eas may consist of billions of secondaries including photons electrons muons and some neutrons that arrive at ground level over areas of many square kilometres. Extensive air showers and ultra high energy cosmic rays a historical review karl heinz kampert1 a and alan a watson2 b 1 department of physics university wuppertal germany 2 school of physics and astronomy university of leeds uk abstract the discovery of extensive air showers by rossi schmeiser bothe kolh orster and auger at the end of the 1930s facilitated by the coincidence . Ultrahigh energy cosmic rays carry information about their sources and the intervening medium apart from providing a beam of particles for studying certain features of high energy interactions currently inaccessible at man made accelerators they can at present be studied only via the extensive air showers eass they generate while passing through the earth39s atmosphere since their