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	CWP at physics.UCLA.edu // Ida Noddack
		The discovery of element 43 by Berg, Noddack and Tacke in naturally occuring rock was not confirmed and is now disputed because all known isotopes of this element are unstable with half-lives much less than the age of the earth; for discussions see e.g., P. Van Assche, Nuc.
		A recent account of this matter is given by Teri Hopper in "She was ignored: Ida Noddack and the discovery of nuclear fission," Master's thesis, Stanford University 1990.
		Walter Noddack was professor of chemical physics (we say chimie physique) at Strasbourg University and was helped by his wife Ida. Nothing is known about the scientific work of the couple during this period.
	www.physics.ucla.edu /~cwp/Phase2/Noddack,_Ida_Tacke@844157201.html (753 words)

	Ida Tacke and Nuclear Fission
		Ten years later in 1935, Tacke published another important paper, in which she proposed that atoms were split into large fragments in Enrico Fermi's experiments involving so-called transuranic elements.
		Tacke chose Rhenium for element 75 for the river Rhine.
		Ida Tacke was never investigated because she never had a paid position.
	www.hypatiamaze.org /ida/tacke.html (1477 words)

	Ida Tacke Noddack Biography / Biography of Ida Tacke Noddack World of Chemistry Biography
		Ida Tacke Noddack's continuing study of the periodic table also led her to be the first to suggest in 1934 that physicist Enrico Fermi had not made a new element in an experiment with uranium as he thought, but instead had discovered nuclear fission.
		Ida Tacke was born in Germany on February 25, 1896 and studied at the Technical University in Berlin, where she received the first prize for chemistry and metallurgy in 1919.
		Tacke and Walter Noddack, who headed the chemical laboratory at the Physico-Technical Research Agency in Berlin, focused instead on the lateral neighbors of the missing elements, molybdenum, tungsten, osmium, and ruthenium.
	www.bookrags.com /biography-ida-tacke-noddack-woc (686 words)

	Masurium - Wikipedia, the free encyclopedia
		Two of the discoverers of rhenium, Walter Noddack and Ida Tacke claimed to have at the same time (1925) discovered this element which they named after Masuria in Eastern Prussia, the region where Walter Noddack's family originated.
		Their claim of discovery was not generally accepted, and so the element was eventually named by the Italian chemists Carlo Perrier and Emilio Segrè who had detected in a sample of molybdenum that had been bombarded with deuterium nuclei.
		Recently, work by John T. Armstrong at NIST suggests that the Noddacks had indeed discovered element 43, but it is extremely unlikely that even if this view were to be widely accepted that their proposed name would be adopted at this late date.
	en.wikipedia.org /wiki/Masurium (172 words)

	E007: The Masurium File: An X-Ray Mystery (Site not responding. Last check: 2007-11-04)
		Walter Noddack, Ida Tacke and Otto Berg [1] reported the discovery of masurium and rhenium, elements 43 and 75, on the basis of weak lines in X-ray spectra excited by electron impact on fractions extracted from niobium and platinum ores.
		It is now known that a longer-lived isotope of Tc, produced by spontaneous fission, occurs naturally in uranium ores, but in concentrations which may, or may not, fall short by several factors of ten from what would have been detected in the Ma experiments [3,4].
		Ida Noddack-Tacke [5] published the first suggestion (for which she received little attention or credit) that Fermi's 'new elements' could be products of atomic fission and described how to prove it, five years before the idea was accepted.
	www.hwi.buffalo.edu /ACA/ACA97/abstracts/text/E007.html (283 words)

	CWP at physics.UCLA.edu // Ida Noddack
		This element was later (1937) found by C. Perrier and E. Segre in a molybdenum foil irradiated in the Berkeley cyclotron, and named technetium.
		The discovery of element 43 by Berg, Noddack and Tacke in naturally occuring rock was and is disputed because all known isotopes of this element are unstable with half-lives much less than the age of the earth; for discussions see e.g., P. Van Assche, Nuc.
		On the failure to acknowledge Ida Noddack's 1934 suggestion that neutron bombardment might cause fragmentation (fission) of the uranium nucleus, Enrico Fermi's colleague and coworker in Rome, Emilio Segre, wrote
	cwp.library.ucla.edu /Phase2/Noddack,_Ida_Tacke@844157201.html (755 words)

	Geographical Places: page 2 of 2
		(Latin) for the Rhenany-Reinland of Ida Tacke´s birth.
		Tacke went on to isolate a milligram of Rhenium in 1926 and determine its chemistry.
		In 1934 Ida Tacke Noddack was the first to suggest that neutron bombardment might cause fission of the uranium nucleus.
	homepage.mac.com /dtrapp/Elements/places2.html (1693 words)

	Scientific American: An Elemental Mystery (Site not responding. Last check: 2007-11-04)
		In 1925 German chemist Ida Tacke and her colleagues made a stunning announcement.
		In their work, Tacke, Walter Noddack (who would become her husband) and Otto Berg fired a beam of electrons at different materials, inducing them to emit x-rays.
		It was widely known at the time that the wavelengths of the x-rays were directly related to the atomic numbers of the elements in the bombarded substance.
	www.sciam.com /print_version.cfm?articleID=000669FB-B5F4-1C75-9B81809EC588EF21 (202 words)

	75 Rhenium
		In 1925 the discovery of elements #43 (Medeleyev's Eka-Manganese) and #75 (Dvi-Manganese), the last missing elements on the main periodic table, was announced by Walter Noddack (1893-1960), Ida Eva Tacke (1896-1978, she married in 1926 Walter Noddack) and Otto Berg (1873-).
		Noddack and Tacke at the Physico-Technical Testing Office in Berlin started in 1922 with their attempts to separate elements #43 and #75, first from Platinum ore, but since that was too costly, soon continued with the rare-earth minerals.
		After three years research, element #75 was separated from gadolinite and named Rhenium (Latin for the River Rhine), after the Rheinland (Rhineland), the homeland of Ida Tacke (she was born in Lackhausen/Wesel).
	elements.vanderkrogt.net /elem/re.html (434 words)

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