ANALYSIS OF (n,α) REACTION BY USE OF MODIFIED TNG CODEJapan Atomic Energy Research Institute Tokai-mura, Naka-gun, Ibaraki-ken 319-11, Japan Kichinosuke Harada Nuclear Energy Data Center Tokai-mura, Naka-gun, Ibaraki-ken 319-11, Japan The nuclear-model code TNG is modified to treat alpha-particle emission more physically. Information of the intrinsic wave function of alpha-particle is contained in the formation factor proposed by Iwamoto and Harada. The spectra of alpha-particle emitted from structural materials are calculated and compared with experimental data in order to verify the present modification. Furthermore, activation cross sections for the (n,α) reactions are calculated by using the modified code. KEYWORDS: TNG, nuclear-model code, alpha-particle formation factor, alpha-particle emission spectra, activation cross section |