Heisenberg, Werner. Ò†ber die Spektra von Atomsystemen mit zwei Elektronen.Ó Contained in Zeitschrift fŸr Physik, Vol. 39, Berlin, Julius Springer, 26 October, 1926, pp. 499-518.
Contemporary blue buckram, with title, issue, and year in gilt on spine.
Very good. With the pencil signature of Nobel Laureate John H. Van Vleck., All attempts to explain the helium spectra using the old quantum mechanics of Bohr and Sommerfeld had failed. Incorporating both PauliÕs exclusion principle and spin into Schršdinger's two-electron wave function, Heisenberg was finally able to derive a good approximation to the emission spectrum of helium. This result marks the second great triumph of wave mechanics after Schršdinger;s treatment of hydrogen. In the course of this derivation, Heisenberg hit upon a new insight and established the principle of Òexchange interactionÓÑa force generated solely by the exchange of positions of two totally indistinguishable quantum particlesÑwhich turned out to have much wider implications in both solid-state and nuclear physics. Van Vleck won the 1977 Nobel Prize in physics for his Òfundamental theoretical investigations of the electronic structure of magnetic and disordered systems.Ó
$US1100
This item is listed on Bibliopoly by Michael R. Thompson Bookseller; click here for further details.