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Über Phasenbeziehungen bei den Bohrschen Modellen von Atomen und Molekeln.
Berlin, Julius Springer, 1923. 8vo. In contemporary half cloth with gilt lettering. In ""Zeitschrift für Physik"" Bd. 14, 1923. Entire issue offered. Stamp to front free end paper and title page, otherwise a fine and clean copy. Pp. 44-55. [Entire volume: IV, 414 pp.].
First printing of Born and Heisenberg's paper on Bohr's atomic model, being a part of Heisenberg's Habilitation, which he completed under Born in 1924 in Göttingen.Cassidy 1923a.
Über den Einfluß der Deformierbarkeit der Ionen auf optische und chemische Konstanten. I.
Braunschweig und Berlin, Vieweg & Sohn, Julius Springer, 1924. 8vo. In comtemporary half cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Band 23. Entire issue offered. Stamp to titel page. Otherwise a fine and clean copy. Pp. 388-410. [Entire volume: IV, 417, (1) pp.].
First printing of Born and Heisenberg's paper on the deformability of the ions on optical and chemical constants.
Über die Einfluss der Deformierbarkeit der Ionen auf optische und chemische Konstanten. I.
Berlin, Springer, 1924. 8vo. In contemporary halv cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Bd. 23, 1924. Entire volume offered. Stamp to front free end-paper and titlepage, otherwise fine and clean. Pp. 388-410. [Entire volume: IV, 417, (1) pp.].
First printing of Born and Heisenberg's paper on the deformability of the ions on optical and chemical constants. Cassidy 1924c
"HEISENBERG, WERNER & MAX BORN & PASQUAL JORDAN & WOLFGANG PAULI.
Reference : 39170
(1925)
Über quantentheoretische Umdeutung kinematischer und mechanischer Beziehungen. (Heisenberg). With: Zur Quantenmechanik. (Born a. Jordan). With: Zur Quantenmechanik II. (Born, Heisenberg a. Jordan). With: Über das Wasserstoffspektrum vom Standpunkte de... - [THE BIRTH OF QUANTUM MECHANICS]
Berlin, Julius Springer, 1925-26. Bound in 4 nearly uniform contemp. hcloth. Edges a little rubbed. Stamp on title-pages. In ""Zeitschrift für Physik. Hrsg. von Karl Scheel"", Vols 33,34,35 and 36. VII,950"VII,953VIII,954"VII,951 pp. The offered papers: pp. 879-893 (vol.33), pp. 858-888 (vol.34), pp.557-615 (vol.35) and pp.336-363 (vol. 36). Internally fine and clean.
First printings of these four absolutely fundamental papers, which together MARK THE TURNING POINT IN THE FABRICATION OF A NEW PHYSICS, Quantum Mechanics, also called ""Matrix Mechanics"".""In May 1925, Heisenberg took on a new and difficult problem, the calculation of the line intensities of the hydrogen spectrum. Just as he had done with Kramers and Bohr, Heisenberg began with a Fourier analysis of the electron orbits. When the hydrogen orbit proved too difficult, he turned to the anharmonic oscillator. With a new multiplication rule relating the amplitudes and frequencies of the Fourier components to observed quantities, Heisenberg succeeded in quantizing the equations of motion for this system in close analogy with the classical equations of motion.....in June Heisenberg returned to Göttingen, where he drafted his fundamental paper [the first paper offered], which he completed in July. In this paper Heisenberg proclaimed that the quantum mechanics of atoms should contain only relations between experimentally observable quantities. The resulting formalism served as the starting point for the new quantum mechanics, based, as Heisenberg's multiplication rule implied, on the manipulation of ordered sets of data forming a mathematical matrix....Born and his assistant, Pascual Jordan, quickly developed the mathematical content of Heisenberg's work into a consistent theory with the help of abstract matrix algebra [the second paper offered].Their work, in collaboration with Heisenberg, culminated in their ""three-man paper"" [""Dreimännerarbeit"" - the third paper offered] that served as the foundation of matrix mechanics. Confident of the correctness of the new theory, Heisenberg, Pauli, Born, Dirac, and others began applying the difficult mathematical formalism to the solution of lingering problems."" (DSB).In the last paper offered, the Pauli-paper, he shows that the hydrogen spectrum can be derived from the new theory. His starting-point constitutes, due to Lez, a method for integrating the classical equations of motion of a particle in a Coulomb field. Pauli's paper was received on January 17, 1926, but the main result must have been obtained before November 3, 1925, for on that date, Heisenberg writes Pauli: ""..Ich brauche Ihnen wohl nicht zu schreiben, wie sehr ich mich über die neue Theorie des Wasserstoffs freue..."" Pauli's paper convinced most physicists that Quantum Mechanics is correct. (Van der Waerden).
Die Elektronenbahnen im angeregten Heliumatom.
[Berlin, Julius Springer, 1923]. 8vo. Extracted from ""Zeitschrift für Physik. Hrsg. von Karl Scheel. 16. Band"". No backstrip. Pp. 229-244.
First printing of this important paper in which Heisenberg and Born applied the quantum theory the helium atom.Heiseberg arrived in Gottingen for the winter semester of 1922-1923, which gave a private assistantship with Born.""Except for semester-long visits to Munich and Copenhagen. Heisenberg remained in Göttingen until May 1926. The period was one of his most productive scientifically. With his colleagues there, he developed the matrix form of quantum mechanics, progressed toward an interpretation of the new formalism, and applied the quantum theory, along with electron spin, to the Zeeman effect, the helium atom, and other old problems. In July 1924 Heisenberg qualified to teach on the university level by presenting to the Göttingen faculty a modification of the quantum rules for the Zeeman effect. The modification foreshadowed the notions of what Born was now calling a future ""quantum mechanics."" (DSB).
Die Elektronenbahnen im angeregten Heliumatom.
[Berlin, Julius Springer, 1923]. 8vo. Extracted from ""Zeitschrift für Physik. Hrsg. von Karl Scheel. 16. Band"". No backstrip. Pp. 229-244.
First printing of this important paper in which Heisenberg and Born applied the quantum theory the helium atom.Heiseberg arrived in Gottingen for the winter semester of 1922-1923, which gave a private assistantship with Born.""Except for semester-long visits to Munich and Copenhagen. Heisenberg remained in Göttingen until May 1926. The period was one of his most productive scientifically. With his colleagues there, he developed the matrix form of quantum mechanics, progressed toward an interpretation of the new formalism, and applied the quantum theory, along with electron spin, to the Zeeman effect, the helium atom, and other old problems. In July 1924 Heisenberg qualified to teach on the university level by presenting to the Göttingen faculty a modification of the quantum rules for the Zeeman effect. The modification foreshadowed the notions of what Born was now calling a future ""quantum mechanics."" (DSB).Cassidy 1923b
