New photom yields measurement in air and its effect on the energy the energy estimation of ultra-high energy cosmic rays(jointly worked). 28th International Cosmic Ray Conference(Tsukuda). 2003. 2. 841-844
Photon yield from dry air execited by electrons (joiutly worked). 28th International Cosmic Ray Conference(Tsukuba). 2003. 2. 829-832
New photom yields measurement in air and its effect on the energy the energy estimation of ultra-high energy cosmic rays(jointly worked). 28th International Cosmic Ray Conference(Tsukuda). 2003. 2. 841-844