VOL. 53, NO. 1, FEBRUARY 2006 | J. Allison, K. Amako, J. Apostolakis, H. Araujo, P. Arce Dubois, M. Asai, G. Barrand, R. Capra, S. Chauvie, R. Chytracek, G. A. P. Cirrone, G. Cooperman, G. Cosmo, G. Cuttone, G. G. Daquino, M. Donszelmann, M. Dressel, G. Folger, F. Foppiano, J. Generowicz, V. Grichine, S. Guatelli, P. Gumplinger, A. Heikkinen, I. Hrivnacova, A. Howard, S. Incerti, V. Ivanchenko, T. Johnson, F. Jones, T. Koi, R. Kokoulin, M. Kossov, H. Kurashige, V. Lara, S. Larsson, F. Lei, O. Link, F. Longo, M. Maire, A. Mantero, B. Mascialino, I. McLaren, P. Mendez Lorenzo, K. Minamitomo, K. Murakami, P. Nieminen, L. Pandola, S. Parlati, L. Peralta, J. Perl, A. Pfeiffer, M. G. Pia, A. Ribon, P. Rodrigues, G. Russo, S. Sadilov, G. Santin, T. Sasaki, D. Smith, N. Starkov, S. Tanaka, E. Tcherneaia, B. Tomé, A. Trindade, P. Truscott, L. Urban, M. Verderi, A. Walkden, J. P. Wellisch, D. C. Williams, D. Wright, and H. Yoshida
Geant4 is a comprehensive software toolkit for simulating particle interactions in matter, widely used in high energy physics, astrophysics, space science, medical physics, and radiation protection. The toolkit has been continuously updated to enhance its functionality and performance, addressing various areas such as performance optimization, field propagation, event biasing, geometry, physics processes, and interactive capabilities. Recent developments include improvements in run and event management, region-dependent production thresholds, variance reduction, detector modeling, and physics extensions. The toolkit's modular architecture allows for easy integration of new components and physics models, which are rigorously validated against experimental data. Geant4 also supports interactive capabilities, visualization, user interfaces, and parallel processing, making it a versatile tool for a wide range of scientific applications. The collaboration behind Geant4 continues to develop and refine the toolkit to meet the evolving needs of the scientific community.Geant4 is a comprehensive software toolkit for simulating particle interactions in matter, widely used in high energy physics, astrophysics, space science, medical physics, and radiation protection. The toolkit has been continuously updated to enhance its functionality and performance, addressing various areas such as performance optimization, field propagation, event biasing, geometry, physics processes, and interactive capabilities. Recent developments include improvements in run and event management, region-dependent production thresholds, variance reduction, detector modeling, and physics extensions. The toolkit's modular architecture allows for easy integration of new components and physics models, which are rigorously validated against experimental data. Geant4 also supports interactive capabilities, visualization, user interfaces, and parallel processing, making it a versatile tool for a wide range of scientific applications. The collaboration behind Geant4 continues to develop and refine the toolkit to meet the evolving needs of the scientific community.