Item #120 Quantentheorie und Magneton, in Physikalische Zeitschrift, 21, 1920. Wolfgang Pauli.

Quantentheorie und Magneton, in Physikalische Zeitschrift, 21, 1920

Leipzig: S. Hirzel, 1920. 1st Edition. "Quantentheorie und Magneton" is the paper in which the physicist and Nobel Prize winner Wolfgang Pauli first introduced the fundamental unit of the magnetic moment of an electron.

"The need for obtaining reliable information about the dimensions of electron orbits represented a fundamental issue in atomic physics in the early 1920s. Pauli studied the known experiments and wondered if they might "contain larger errors than admitted and proposed 'further measurements, which can decide the important question,'" (Mehra and Rechenberg, The Historical Development of Quantum Theory, 388). "Quantentheorie und Magneton" was Pauli's second paper "on the subject of atomic magnetism, this time on the paramagnetism of molecules" (ibid). As said, in it, he first introduces the fundamental unit of the magnetic moment of an electron in a Bohr orbit. Pauli states: "The magnetic moments per mole or gram-atom must, therefore, for all substances be multiples of a certain unit, which we call the Bohr magneton." Item #120

CONDITION & DETAILS: Leipzig: S. Hirzel, 1920. 4to. (10.5 x 7.75 inches, 262 x 193mm). [12], 721 pages, [3]. The Pauli paper appears on pages 615-618. EXTERIOR: Bound in brown cloth over marbled paper boards. The spine is gilt-lettered and dated. The lower half of the front board is scuffed and faded; the rear board has a small area of marbled paper missing at its foot. The edge tips are a bit bumped and scuffed. The binding is tight and very solid.INTERIOR: Complete. The first twelve pages are moderately toned brown; an old (very light) dampstain is at the foot of the first thirty pages, though only five or so have any toning change (the rest is apparent only by a very slight crinkling of the paper). There is another very light dampstain at the foot of the last seventy five pages, though it is barely visible. None of the above obscures any text whatsoever. The vast amount of the volume is toned, but otherwise very clean (as is the Pauli paper). $450.

Price: $250.00