���Θ_�I���f���R�A�|�e���V������p���āAGdO �̊��y�ї�N��ԁA ⁹Σ^-, ⁷Σ^-,. ⁹Δ, ⁷Δ,. ⁹(PAI), ⁷(PAI), 2⁹Σ^- �ɑ΂���>�G�l���M�[�Ȑ���CASSCF�����MRSDCI�ŋ��߁A�e���l�A�j�ԋ����A�L�k�U�������v�Z�����B���l�̑���l��������̂ɂ‚��Ă͂悭�Č��ł����B

Electronic structures of GdO molecule in ⁹Σ^-, ⁷Σ^-,. ⁹Δ, ⁷Δ,. ⁹(PAI), ⁷(PAI), 2⁹Σ^- states are studied by CASSCF and MRSDCI methods using spin-free relativistic Model Core Potentials. Calculated term energies and bond lengths agree very well with available experimental ones.