We developed two computer codes: CCGAMOW and NONADI for calculating the complex energy eigenvalues and eigenfunctions of deformed Gamow resonances with high accuracy by using the piecewise perturbation method. The code CCGAMOW calculates resonant Nilsson orbitals using the adiabatic approximation in which the energies of the ground and excited rotational states of the daughter nucleus are degenerate. In the code NONADI this approximation and the rotational degree of freedom of the core and the Coriolis coupling in the parent nucleus are taken into account. The difference between adiabatic and non-adiabatic approaches is found to be non-negligible for the proton emission from the ground state of141Ho.©2000 American Institute of Physics.