# Alfred Otto Carl Nier

> Alfred Otto Carl Nier was an American physicist who pioneered the development of mass spectrometry. He was the first to use mass spectrometry to isolate uranium-235 which was used to demonstrate that 235U could undergo fission and developed the sector mass spectrometer configuration now known as Nier-Johnson geometry.

*American physicist (1911–1994)*

**Canonical URL:** https://fame.am/person/alfred-otto-carl-nier

## Identity
- **Profile type:** Scientist ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Scientists
- **Country:** United States
- **Born:** 1911-05-28
- **Died:** 1994-05-16
- **Status:** deceased
- **Gender:** male

## Bio

Imported from discovery source: wikidata-dump

## Fame
- **Popularity score:** 45.3 / 100
- **Momentum:** 11.2 / 100  (trend: RISING)
- **Historical depth:** 8.3 / 100
- **Now attention:** 0.0 / 100
- **Source confidence:** 50.0 / 100
- **Profile completeness:** 70.0 / 100

## Sources
- [Alfred O.C. Nier](https://sv.wikipedia.org/wiki/Alfred_O.C._Nier)
- [آلفرد او. سی نیر](https://azb.wikipedia.org/wiki/%D8%A2%D9%84%D9%81%D8%B1%D8%AF_%D8%A7%D9%88._%D8%B3%DB%8C_%D9%86%DB%8C%D8%B1)
- [Alfred Nier](https://de.wikipedia.org/wiki/Alfred_Nier)
- [Alfred O. C. Nier](https://en.wikipedia.org/wiki/Alfred_O._C._Nier)
- [Alfred Nier](https://es.wikipedia.org/wiki/Alfred_Nier)
- [آلفرد او. سی نیر](https://fa.wikipedia.org/wiki/%D8%A2%D9%84%D9%81%D8%B1%D8%AF_%D8%A7%D9%88._%D8%B3%DB%8C_%D9%86%DB%8C%D8%B1)
- [Alfred Otto Carl Nier](https://it.wikipedia.org/wiki/Alfred_Otto_Carl_Nier)
- [앨프리드 니어](https://ko.wikipedia.org/wiki/%EC%95%A8%ED%94%84%EB%A6%AC%EB%93%9C_%EB%8B%88%EC%96%B4)
- [Alfred Nier](https://nl.wikipedia.org/wiki/Alfred_Nier)
- [Wikidata](https://www.wikidata.org/wiki/Q429114)

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