 | Review waiting, please be patient.
This may take 3 months or more, since drafts are reviewed in no specific order. There are 2,689 pending submissions waiting for review.
Where to get help
How to improve a draft
You can also browse Wikipedia:Featured articles and Wikipedia:Good articles to find examples of Wikipedia's best writing on topics similar to your proposed article. Improving your odds of a speedy review To improve your odds of a faster review, tag your draft with relevant WikiProject tags using the button below. This will let reviewers know a new draft has been submitted in their area of interest. For instance, if you wrote about a female astronomer, you would want to add the Biography, Astronomy, and Women scientists tags. Editor resources
Reviewer tools
|
| Submission declined on 20 July 2024 by 97198 (talk). This submission is not adequately supported by reliable sources. Reliable sources are required so that information can be verified. If you need help with referencing, please see Referencing for beginners and Citing sources.
Where to get help
How to improve a draft
You can also browse Wikipedia:Featured articles and Wikipedia:Good articles to find examples of Wikipedia's best writing on topics similar to your proposed article. Improving your odds of a speedy review To improve your odds of a faster review, tag your draft with relevant WikiProject tags using the button below. This will let reviewers know a new draft has been submitted in their area of interest. For instance, if you wrote about a female astronomer, you would want to add the Biography, Astronomy, and Women scientists tags. Editor resources
This draft has been resubmitted and is currently awaiting re-review. |  |
Leon Owen Morgan (Oklahoma City, United States, October 25, 1919 – Austin, Texas, USA, July 29, 2002) was an American chemist and professor of chemistry at the University of Texas at Austin. He co-discovered the chemical element americium.
Academic Training Morgan was born in Oklahoma City in 1919. He graduated summa cum laude from Oklahoma City University in 1941. He then entered the University of Texas at Austin, earning his master's degree in chemistry in 1942.[1]
Early Career
editDuring World War II, Morgan worked on the Manhattan Project, aiming to develop the atomic bomb. He was assigned to the University of Chicago, where he joined the Nuclear Chemistry Metallurgy Research Group under Nobel Laureate Glenn T. Seaborg. There, he worked on the chemistry of plutonium processing, which led to his involvement in the isolation of curium and the discovery of americium (element 95) in 1944-45. After the war, Morgan completed his PhD under Seaborg at the University of California, Berkeley, in 1947.
Scientific Career
editSearch for New Elements
editMorgan was part of the Laboratory of Metallurgy (LabMet) at the University of Chicago, directed by Glenn T. Seaborg. With sufficient plutonium available, Seaborg instructed chemists Ralph A. James and Leon O. Morgan to irradiate plutonium in the Berkeley cyclotron, sending samples to Chicago for analysis by Albert Ghiorso. They confirmed the presence of americium by identifying characteristic alpha particles emitted by the activated samples.
Discovery of Americium
editAmericium (atomic number 95) was discovered in 1944-45 by Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, and Albert Ghiorso by irradiating plutonium with neutrons in the 60-inch cyclotron at the University of California, Berkeley.[2] The element is named after The element is named after America, especially the United States of America.[3]
Academic Career
editIn 1947, after completing his PhD, Morgan joined the Department of Chemistry at the University of Texas at Austin, where he retired as professor emeritus in 1993. He initiated a nuclear chemistry and radiochemistry program focusing on elements such as tungsten, rhenium, and osmium, and the study of electrochemical processes.
He directed the first-year chemistry program, taught various classes, and supervised many graduate students and postdoctoral fellows. In the mid-1950s, Morgan investigated nuclear magnetic resonance spectroscopy, contributing to the development of the Solomon-Bloembergen-Morgan (SBM) theory, which laid the groundwork for magnetic resonance imaging (MRI)[4], a critical diagnostic tool in medicine.
Morgan served in various capacities at the university, including graduate advisor in chemistry, chairman of the Graduate School, member of the University Intercollegiate Athletics Council, and chairman of the Advisory Committee after his retirement.
His later research focused on the dissolution of transition metal coordination complexes, emphasizing biological interest structures like the iron-porphyrin structures in hemoglobin and cytochrome-c.
Other Positions
editBeyond his academic career, Morgan consulted with colleagues at the Los Alamos Scientific Laboratory in New Mexico and was an associate editor of the ACS Journal of Chemistry Physics in 1964.
Death
editLeon Owen Morgan passed away on July 29, 2002, in Austin, Texas, at the age of 82.
References
edithttps://canov.jergym.cz/objevite/objev/mor2.htm
https://ahf.nuclearmuseum.org/ahf/profile/leon-o-tom-morgan/
https://books.google.es/books?id=e53sNAOXrdMC&pg=PA235#v=onepage&q&f=false
https://elements.vanderkrogt.net/element.php?sym=am
- ^ "Leon O. (Tom) Morgan - Nuclear Museum". https://ahf.nuclearmuseum.org/. Retrieved 2024-07-23.
{{cite web}}: External link in|website= - ^ Seaborg, Glenn Theodore (1994). Modern Alchemy: Selected Papers of Glenn T. Seaborg. World Scientific. ISBN 978-981-02-1440-1.
- ^ "95. Americium - Elementymology & Elements Multidict". elements.vanderkrogt.net. Retrieved 2024-07-23.
- ^ "Leon O Morgan - Chem & Biochem - UT Austin". canov.jergym.cz. Retrieved 2024-07-23.