The five-member physics committee included Manne Siegbahn; his former student Erik Hulthén, the professor of experimental physics at Uppsala University ; and Axel Lindh, who eventually succeeded Hulthén. All three were part of the Siegbahn school of X-ray spectroscopy. The poor relationship between Siegbahn and Meitner was a factor here, as was the bias towards experimental rather than theoretical physics. In his report on the work of Meitner and Frisch, Hulthén relied on pre-war papers. He did not think that their work was groundbreaking and argued that the prize for physics was given for experimental rather than theoretical work, which had not been the case for many years. At the time Meitner herself wrote in a letter: "Surely Hahn fully deserved the Nobel Prize for chemistry. There is really no doubt about it. But I believe that Frisch and I contributed something not insignificant to the clarification of the process of uranium fission—how it originates and that it produces so much energy and that was something very remote to Hahn." Hahn's Nobel Prize was long expected; both he and Meitner had been nominated for both the chemistry and the physics prizes several times even before the discovery of nuclear fission. According to the Nobel Prize archive, she was nominated 19 times for Nobel Prize in Chemistry between 1924 and 1948, and 30 times for Nobel Prize in Physics between 1937 and 1967. Her nominators included Arthur Compton, Dirk Coster, Kasimir Fajans, James Franck, Otto Hahn, Oscar Klein, Niels Bohr, Max Planck and Max Born. Despite not having been awarded the Nobel Prize, Meitner was invited to attend the Lindau Nobel Laureate Meeting in 1962.