Stern, Otto

Otto Stern, 1888-1969. German physicist, professor in ffamburg. Nobel Prize in physics in 1943. 

Despite the success of Bohr s model, many physicists took an intellectual step back from Bohr s ideas. Otto Stern threatened to leave physics if that crazy model of Bohr turned out to be correct. (In Chapter 11 we ll see that Stern remained in physics.) As would be expected, older physicists were more likely to eschew... 

When Otto Stern measured the proton moment in the early 1930s, he was advised not to bother—elementary theory proved the result would be one nuclear magneton. Fortunately, Stern had a healthy disregard lor elementary... 

Shortly after the results of the Stern-Gerlach experiment appeared in the scientific literature. Stern received an invitation to join the faculty at the University of Hamburg, where, over the period 1922 to 1933, he continued his experimental work. In 1932, Stern decided to adapt the molecular beam method to a daunting experiment to measure the magnetic moment of the proton, the nucleus of the hydrogen atom. Joining him is this endeavor was Otto Robert Frisch. 

For the second round of experiments, a new student, Immanuel Estermann, worked with Stern. Stern s student assistants were important. Like many experimental scientists, Stern was not particularly good with his hands. He was supreme at conceptuafizing experiments. He was great at interpreting experimental results. But his students shuddered when Otto Stern touched the apparatus. Estermann was adept with his hands. 

In writing about molecular beams, Otto Stem once referred to that beauty and peculiar charm which so firmly captivates physicists working in this field. Stern s statement accurately described Rabi s reaction to his experience in Hamburg. Rabi s powerful physical intuition was stimulated by images of atoms moving through the apparatus and once he was exposed to that beauty and peculiar charm, the course of Rabi s professional life was determined (see Figure 12.1). 

Twinkle twinkle Otto Stern How did Rabi so much learn ... 

Otto Stem (1888—1969). German physicist. He made important contributions to the study of magnetic properties of atoms and die kinetic dieory of gases. Stern was awarded die Nobel Prize in Physics in 1943. 

The Gouy-Chapman theory did not prove entirely satisfactory, and in 1924 a considerable advance was made by the Germ an-American physicist Otto Stern, whose model is shown in Figure 11.18c. Stern combined the fixed double-layer model of Helmholtz with the diffuse double-layer model of Gouy and Chapman, As shown in the figure, there is a fixed layer at the surface, as well as a diffuse layer. On the whole this treatment has proved to be satisfactory, but for certain kinds of investigations it has been found necessary to develop more elaborate models. 

Otto Stern (1888-1969) in 1924 proposed to return a thin layer of immobile molecules between the interface and diffuse layer. In essence, he merged two previous models into one. The layer of associated ions was subsequently called the Stem layer. As a result, the system s model acquired a shape of two sequentially joined capacitors. 

Although Keesom and van Dljk were led to the successful separation of the neon Isotopes through predictions made by Professor Otto Stern based on Eq. (1), Keesom and Haantjes (jS) Interpreted their measurements of the vapor pressure ratio of Ne/ Ne In terms of a 6X/T rather than a temperature... 

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