estermann i immanuel (1 risultati)

1st Edition. FIRST EDITION, FULL VOLUME, OF ESTERMANN, FRISCH, & STERN'S 1931 "CONFIRMATION OF THE DE BROGLIE RELATION TO AN ACCURACY OF 1%" (Zare, Otto "Stern and the Double Bank Shot", Z. Phys. D - Atoms, Molecules and Clusters 10, 377, 1988). One year earlier, Estermann and Stern's 1930 paper, "Beugung von Molekularstrahlen" (Zeitschrift für Physik, Bd. 61, pp. 95-125, 1930) "found that the intensity of the scattered beam recorded as a function of angle showed clearly discernible diffraction maxima" and was an important step towards their 1931 experiment. We offer that work separately. Refining their 1930 efforts, Estermann, Frisch and Stern, in 1931 and in this paper, were able to narrow "the He atom velocity distribution using a velocity selector consisting of a concentric pair of rotating chopper wheels. In this way, Estermann et al. were able to confirm the de Broglie relation to an accuracy of 1%" (Zare). Their paper, however, also "appears to be the first double surface scattering experiment. In this experiment, a beam of He atoms is first scattered off one LiF crystal surface; a diffracted beam, selected in direction, is allowed to impinge on a second LiF crystal surface; and the intensity of the resulting diffracted beam from the second scattering event is then recorded. The concept is very appealing. The first surface scattering event prepares a velocity selected beam of He atoms from the incoming Maxwellian distribution of incident beam particles; the second surface scattering event analyzes the prepared distribution as to how monochromatic (monoenergetic) it is [16]. Clearly this is an experimental tour de force when it is recognized that this study was carried out more than fifty years ago, long before ultra-high vacuum conditions (pressures less than 10 -9 Torr) could be routinely achieved, let alone measured!" ibid). CONDITION & DETAILS: Berlin: Julius Springer. Full volume, 846 pages, fully indexed. Though bound in blue buckram, it bears no library stamps or numbers inside or out. (9 x 6.5 inches; 225 x 163mm). Very slight scuffing at the edges; tightly and very solidly bound. Bright and clean inside and out. Near fine.