gregor wentzel (18 resultados)

Hardcover. Condición: Very Good. pp.x, 224 pages, a very good hardback, publisher's original beige (light brown) cloth binding with black lettering to the spine and front cover, from a uk university.

Hardcover. Condición: Good+. Estado de la sobrecubierta: No Dust Jacket. First US Edition. Green cloth covered boards with light edgewear and gilt title to spine. Fraying just starting at spine ends and corners. Binding shaken. Text unmarked. Text in German. Lightly toned interior. Not illustrated. Bookshop label and previous owner name to ffep. Not ex-library. ; 8vo 8" - 9" tall; 208 pages.

hardcover. Condición: Good. No dust jacket. Good hardcover with some shelfwear; may have previous owner's name inside. Standard-sized.

Paperback. Condición: Very Good. 80p paperback, front paper cover detached, last pages earmarked at top right corner, text clean, some pages of adverts in back, overall good condition Language: German.

Gr.-8°, 208 Seiten, Originalbroschur (angestaubt, Rücken teils beschädigt, Hinterdeckel fehlt). Titelblatt oben rechts mit Ausschnitt. Unbeschnittenes Exemplar.

Hard Cover. Condición: Very Good. 208 pages. "In der theoretisch-physikalischen Forschung der letzten Jahre haben die Arbeiten uber die Quantentheorie der Felder einen bedeutenden Platz eingenommen." VERY GOOD HARDCOVER, with the corners and spine edges of the book are worn and spine edge is rubbed. Text is fine. Size: 8vo - over 7¾" - 9¾" tall.

Condición: Good. Franz Deuticke, 1943. German text; cover rubbed/lightly sunned/lightly soiled, spine sunned, corners and spine ends rubbed/bumped; edges lightly soiled; pages lightly age-toned; binding tight; cover, edges, and interior intact and clean except as noted. hardcover. Good.

Hardcover. Condición: Fine. Octavo in tan cloth; 224 pages 24 cm, No jacket. In English. Fine copy; previous owner's name written in pen on upper open corner of ffep; o/w clean cloth; tight, solid binding; clean, crisp, bright pages.

In-8° gr. pp. IV-208, legatura in mezza tela recente, conservata la bross. edit. con tracce d'uso e alcune annotaz. a matita. Macchia d'inchiostro al margine delle ultime 3 pagine.

8°, Obr. 1. Aufl. 93 Seiten mit einigen Abbildungen, Einband leicht berieben, ansonst guter und sauberer Zustand. -------------------------------------------- Enthält: PANETH, Fritz A. Die chemische Erforschung der Stratosphäre; WENTZEL, Gregor. Probleme der Kraftwirkung im Atomkern; THIRRING, Hans. Der gegeewärtige Stand unserer Kenntnisse von der kosmischen Strahlung; MARK, Hermann. Kleine Ursachen - große Wirkungen im Fortschritt der Naturwissenschaften; DEBEYE, Peter und MAYERHÖFER, Josef. Der Vorstoß zum absolutem Nullpunkt. Sprache: Deutsch Gewicht in Gramm: 190.

gr.8°. IV,209 S. Obrosch., etw. angestaubt, Rücken mit gekl. Einriß., innen sauber und gut erh.

In-8° pp. X-224, legatura eedit. Ottimo stato.

Broschiert. IV, 208 S. Einband rissig, berieben u. bestaubt G1000a *.* Sprache: Deutsch Gewicht in Gramm: 460.

Softcover. Condición: Wie neu. Broschur, 224 Seiten,

Gr.-8°, Softcover/Paperback. 1.Auflage,. IV, 208 Seiten Einband etwas berieben, Bibl.Ex., Rücken überklebt, unbeschnitten, innen guter und sauberer Zustand. ----------------------------------------------------- Gregor Wentzel (* 17. Februar 1898 in Düsseldorf; 12. August 1978 in Ascona) war ein deutscher theoretischer Physiker. Wentzel ist mit Hendrik Anthony Kramers und Leon Brillouin einer der Erfinder der WKB-Näherung in der Quantenmechanik. Sprache: Deutsch Gewicht in Gramm: 540.

1st Edition. BOUND FIRST EDITION OF FERMI'S "VERY BEAUTIFUL & SUGGESTIVE" PAPER ON THE IMPACT BETWEEN ELECTRICALLY CHARGED PARTICLES & ATOMS (Bohr Quote, Stolzenburg, Emergence of Quantum Mechanics, 71). ALSO FIRST EDITION OF WENTZEL'S QUANTUM THEORETICAL TREATMENT OF DISPERSION. Volume bears the ownership stamp of Friedrich Hermann Hund, a physicist well-known for his work on atoms and molecules. "In statistical mechanics [Fermi] had written subtle papers on the ergodic hypothesis and on quantum theory. [In this paper] he developed an original form of analyzing collisions of charged particles" (History of Science: The Wenner Collection). Here Fermi "attempted to explain the retardation of swiftly moving particles by resolving the electric field of the charged particles into its harmonics, then comparing it with a radiation field having a suitable frequence distribution" (Stolzenburg). As Bohr understood it, Fermi wanted "to develop a theory of the stopping of swiftly moving particles and of the ionization produced by them in which a mechanical description of the collisions is altogether disregarded" (ibid). "[This paper describes Fermi's development of "the field produced by the charged particle by the Fourier integral and used the information from optical processes to determine the result of the collision" (Wenner) "[Fermi] compares the result of the interaction between the particle and the atom with the action of a number of harmonic radiation fields so chosen that the superposition of the electric forces at the position of the atom represents the rapidly changing electric field to which the electrons in the atom are subjected as a result of the swiftly passing particle. By estimating the action of each of these radiation fields by means of the laws holding for the absorption of X-rays, Fermi obtains values for the total ionization that agree with the experimental results in order of magnitude" (Stolzenburg, 71, 200). "This method was later refined and better justified on the basis of quantum mechanics and is generally known as the Weizsäcker-Williams method" (Wenner). With respect to the Wentzel paper, this is Wentzel's quantum theory formula for dispersion based on the correspondence principle, not to be confused with Wentzel's theory of interference presented earlier in the same year. "In Wentzel's formula the resonance frequency in dispersion is somewhat different from the natural spectroscopic frequency and causes a dissymmetry in dispersion which Wentzel claims is supported by experimental evidence in hydrogen" (Bulletin of the National Research Council, Issues 51-54, 165). "Wentzel supports a point of view according to which the quantum-theoretical dispersion formula. must be regarded as a kind of distorted classical dispersion formula" (van der Waerden, Sources of Quantum Mechanics, 237). CONDITION & DETAILS: Berlin: Vieweg und Springer. Large 8vo. (9 x 6 inches; 225 x 150mm). Two small stamps on the rear of the title page as well as an envelope slot on the rear pastedown. Bears the ownership stamp (on ffp) of Friedrich Hermann Hund, a physicist well-known for his work on atoms and molecules. Hund "was a German physicist from Karlsruhe known for his work on atoms and molecules. Hund worked with such prestigious physicists as Schrödinger, Dirac, Heisenberg, Max Born, and Walter Bothe. He published more than 250 papers and essays in total. Hund made pivotal contributions to quantum theory - especially concerning the structure of the atom and of molecular spectra" (Wikipedia). Very slight ghosting at the spine from the removal of a spine label; small area blackened to match cloth. Regardless, a handsome volume solidly and tightly bound in black cloth over marbled paper boards; slight rubbing at the edges. Bright and very clean throughout. Very good condition.

1 S. Gr.-4to. An den Physiker und Nobelpreisträger Isidor Isaac Rabi (18981988): [.] As to eventual lectures, I thank you very much for the invitation. Perhaps one of the following subjects might interest you: I) a summarizing report on theories of point electrons, 2) a survey of the present status of Heisenberg's S-matrix theory? (I have not done much work on the S-matrix myself, but I happen to know 2 unpublished papers by Heisenberg which seem to be unknown in this country.) [.]". Der mit Werner Heisenberg und Wolfgang Pauli bekannte Physiker übernahm 1929 den Lehrstuhl Erwin Schrödingers in Zürich und war von 1945 bis 1947 Präsident der Schweizerischen Physikalischen Gesellschaft. 1948 wurde Wentzel Professor an der Universität Chicago und erhielt später die amerikanische Staatsbürgerschaft. Wentzel beschäftigte sich vor allem mit der Wellenmechanik (Wentzel-Kramers-Brillouin-Methode, 1926), die er als einer der ersten auf Stoß- und Streuprozesse anwandte, sowie mit der Systematik der Feldquantisierung. Seine Einführung in die Quantentheorie der Wellenfelder' (1943, engl. 1949) war die erste Darstellung der Quantenfeldtheorie. 1975 wurde Wentzel mit der Max-Planck-Medaille ausgezeichnet" (DBE). Auf Briefpapier mit gedr. Briefkopf der Purdue University; mit Eingangsstempel und Spuren alter Heftung.

¾ S. Gr.-4to. An den Physiker und Nobelpreisträger Isidor Isaac Rabi (18981988): [.] The value 3.1031 cm2 as an upper limit to the electron-neutron cross section is indeed very interesting. I suppose this is theory. It would be fine if you could still further increase the accuracy of your measurements. The more upsetting is the large anomalous electron-proton interaction which causes the shift of the 2S level [.]". Der mit Werner Heisenberg und Wolfgang Pauli bekannte Physiker übernahm 1929 den Lehrstuhl Erwin Schrödingers in Zürich und war von 1945 bis 1947 Präsident der Schweizerischen Physikalischen Gesellschaft. 1948 wurde Wentzel Professor an der Universität Chicago und erhielt später die amerikanische Staatsbürgerschaft. Wentzel beschäftigte sich vor allem mit der Wellenmechanik (Wentzel-Kramers-Brillouin-Methode, 1926), die er als einer der ersten auf Stoß- und Streuprozesse anwandte, sowie mit der Systematik der Feldquantisierung. Seine Einführung in die Quantentheorie der Wellenfelder' (1943, engl. 1949) war die erste Darstellung der Quantenfeldtheorie. 1975 wurde Wentzel mit der Max-Planck-Medaille ausgezeichnet" (DBE). Auf Durchschlagpapier mit kleinen Randläsuren und Eingangsstempel.