I saw this in 70’s or 80’s.  It was in English and in color.  In a modern laboratory a doctor has built a “cage” outside next to the Dr. office that looks like a geodesic dome about 50 feet across.  A dying young man volunteers to allow the doctor to capture the man’s soul at the moment of death.  When the young man is near death he is wheeled out by staff into the center of the dome/cage.  It is night.  The young man dies and the cage/dome captures the soul which causes a lot of sparks and it was obvious the man’s soul did not like being captured.  I don’t know if this was a movie, or a tv show.  The above I am sure of.  The part I’m not sure of is this was in the country or woods.  The story starts with a couple breaking down in the middle of no where and find this laboratory.  The doctor is very friendly and open about his experiment.  My faulty memory tells me the young dying man reminds me of the actor that played the lead in “The Greatest American Hero”