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Hans Bethe Ph.D.

Hans Bethe Ph.D.

The Nobel Prize in Physics 1967

Award: "for his contributions to the theory of nuclear reactions, especially his discoveries concerning the energy production in stars"

Patents

Publication:1/2
Publication No:US 4336230 A
Title:Frequency chirp in isotopically selective photoexcitation
Publication Type:United States Utility Patent
Publication Date:Jun 22, 1982
Filing Date:Dec 20, 1977
Inventors:JBethe Hans A, Chang Ching S
Original Assignee:Jersey Nuclear-Avco Isotopes, Inc.
Abstract:Method and apparatus for inducing isotopically selective photoexcitation of atoms in at least first and second energy steps. The total energy change accomplished by the two energy steps is provided with isotopic selectivity at precise resonance for the two steps. In an isotope separation system in which an environment of particles of plural isotope types is created, isotopically selective photoexcitation from laser radiation is shown to produce a great improvement in excitation efficiency where the radiation is controlled in the aggregate of plural photons to achieve precise resonance over the plurality of the degenerate energy steps. Even with multimode excitation, precise resonance is only achieved for isolated atoms, and a chirp or frequency sweep is applied to one of several excitation frequencies to insure precise resonance at least once for each atom. In the case of excitation in plural transitions from plural low-lying energy through a generally common upper transition, the chirp may be applied to the radiation producing the common upper level transition alone.
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Publication:2/2
Publication No:US 2519734 A
Title:Directional coupler
Publication Type:United States Utility Patent
Publication Date:Aug 22, 1950
Filing Date:Apr 24, 1945
Inventors:Bethe Hans A
Original Assignee:Bethe Hans A
Abstract:No Abstract
Representative Figure:
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Bethe
Painting Tim Tomkins Painthistory.com

Name: Hans Albrecht Bethe
Birth: 2 July 1906, Strassburg (now Strasbourg), Germany (now France)
Death: 6 March 2005, Ithaca, NY, USA
Institution: Cornell University, Ithaca, NY, USA
Award: "for his contributions to the theory of nuclear reactions, especially his discoveries concerning the energy production in stars"
Subject: astrophysics
Portion of Cash: 1/1
Biography
Patents