Parahelium and Orthohelium - and perturbation theory - repulsion
a000_task_3_spins_combined_3_halves_twice_1_half.png
a000_task_3_spins_combined_3_halves_twice_1_half.png
a010_symmetric_antisymmetric_spin_space_independent.png
a010_symmetric_antisymmetric_spin_space_independent.png
a011_antisymmetric_j-j-coupling.png
a011_antisymmetric_j-j-coupling.png
a020_symmetric_antisymmetric_product.png
a020_symmetric_antisymmetric_product.png
a030_orthohelium_parahelium_spectrum_level_diagram.png
a030_orthohelium_parahelium_spectrum_level_diagram.png
a031_actors_in_Sancore_board.png
a031_actors_in_Sancore_board.png
a032_result_in_Sancore_board_Triplet_antisym_space_reduced_repulsion.png
a032_result_in_Sancore_board_Triplet_antisym_space_reduced_repulsion.png
a039_He_excited_states_repulsion_role_doubly_exited.png
a039_He_excited_states_repulsion_role_doubly_exited.png
a040_excited_states_repulsion_PERTURBATION_Theory_Ground_state.png
a040_excited_states_repulsion_PERTURBATION_Theory_Ground_state.png
a050_Electron_repulsion_in_ground_state_5_8_Z_E_0.png
a050_Electron_repulsion_in_ground_state_5_8_Z_E_0.png