Alfred O. C. Nier, Date of Birth, Place of Birth, Date of Death

Alfred O. C. Nier

American physicist

Date of Birth: 28-May-1911

Place of Birth: Saint Paul, Minnesota, United States

Date of Death: 16-May-1994

Profession: physicist, university teacher

Nationality: United States

Zodiac Sign: Gemini

Alfred Otto Carl Nier (May 28, 1911 – May 16, 1994) 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.