Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Josef Mattauch (21 November 1895 10 August 1976) was a German physicist known for his work in the investigation of the isotopic abundances by mass spectrometry. He developed the Mattauch isobar rule in 1934. One of Herzog's most important contributions to mass spectrometry was the design of a sector mass spectrometer. The Mattauch-Herzog geometry consists of a pi / 4sqrt{2} radian electric sector, a drift length which is followed by a right angle ( / 2) magnetic sector of opposite curvature direction.
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