Ernest Rutherford

Rutherford, Ernest Rutherford, 1st Baron, 1871-1937, British physicist, b. New Zealand. Rutherford left New Zealand in 1895, having earned three degrees from the Univ. of New Zealand but having failed to secure a post as a schoolteacher. After working under J. J. Thomson at Cambridge he was professor of physics at McGill Univ. (1898-1907), professor and director of the physical laboratory at the Univ. of Manchester (1907-19), and in 1919 succeeded Thomson as professor and director of the Cavendish Laboratory at Cambridge.

Rutherford is known for his studies of radioactivity and for his discovery of the atomic nucleus. He discovered and named alpha and beta radiation and with Frederick Soddy proposed a theory of radioactive transformation of atoms; for this work he was awarded the 1908 Nobel Prize in Chemistry. On the basis of experiments with alpha rays carried out under his direction by H. Geiger and E. Marsden he was led (1911) to a description of the atom as a small, heavy nucleus surrounded by orbital electrons; this nuclear model of the atom was taken by Niels Bohr (1913) and combined with the new quantum theory to provide the basic description of the atom still accepted today. In the course of his researches, Rutherford produced hydrogen by bombarding atoms of various elements, e.g., nitrogen, with helium nuclei (alpha rays); these results, published in 1919, were the first evidence of artificially produced splitting of atomic nuclei. In addition to his own work, he was known for his outstanding leadership in directing the research of others.

Rutherford was knighted in 1914 and elevated to the peerage in 1931. His works include Radioactive Transformations (1906), The Electrical Structure of Matter (1926), The Artificial Transmutation of the Elements (1933), and The Newer Alchemy (1937). His collected papers were compiled by Sir James Chadwick (3 vol., 1962-65).

(born Aug. 30, 1871, Spring Grove, N.Z.—died Oct. 19, 1937, Cambridge, Cambridgeshire, Eng.) New Zealand-born British physicist. After studies at Canterbury College, he moved to Britain to attend Cambridge University, where he worked with J.J. Thomson at the Cavendish Laboratory. He would later teach at McGill University in Montreal (1898–1907) and Victoria University in Manchester (1907–19) before becoming chair of the Cavendish Laboratory (from 1919). At the laboratory in the years 1895–97 he discovered and named two types of radioactivity, alpha decay and beta decay. He later identified the alpha particle as a helium atom and used it in postulating the existence of the atomic nucleus. With Frederick Soddy he formulated the transformation theory of radioactivity (1902). In 1919 he became the first person to disintegrate an element artificially, and in 1920 he hypothesized the existence of the neutron. His work contributed greatly to understanding the disintegration and transmutation of radioactive elements and became fundamental to much of 20th-century physics. In 1908 he was awarded the Nobel Prize. He was knighted in 1914 and ennobled in 1931. Element 104, rutherfordium, is named in his honour.

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(born Aug. 30, 1871, Spring Grove, N.Z.—died Oct. 19, 1937, Cambridge, Cambridgeshire, Eng.) New Zealand-born British physicist. After studies at Canterbury College, he moved to Britain to attend Cambridge University, where he worked with J.J. Thomson at the Cavendish Laboratory. He would later teach at McGill University in Montreal (1898–1907) and Victoria University in Manchester (1907–19) before becoming chair of the Cavendish Laboratory (from 1919). At the laboratory in the years 1895–97 he discovered and named two types of radioactivity, alpha decay and beta decay. He later identified the alpha particle as a helium atom and used it in postulating the existence of the atomic nucleus. With Frederick Soddy he formulated the transformation theory of radioactivity (1902). In 1919 he became the first person to disintegrate an element artificially, and in 1920 he hypothesized the existence of the neutron. His work contributed greatly to understanding the disintegration and transmutation of radioactive elements and became fundamental to much of 20th-century physics. In 1908 he was awarded the Nobel Prize. He was knighted in 1914 and ennobled in 1931. Element 104, rutherfordium, is named in his honour.

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Ernest Rutherford, 1st Baron Rutherford of Nelson, OM, PC, FRS (30 August 1871 – 19 October 1937) was a New Zealand physicist who became known as the father of nuclear physics. He pioneered the orbital theory of the atom through his discovery of Rutherford scattering off the nucleus with his gold foil experiment. He was awarded the Nobel Prize in Chemistry in 1908.

Early years

Ernest Rutherford was the son of James Rutherford, a farmer, and his wife Martha (born Thompson, originally from Hornchurch, Essex, England). James had emigrated from Perth, Scotland, "to raise a little flax and a lot of children". Ernest was born at Spring Grove (now Brightwater), near Nelson, New Zealand. His first name was mistakenly spelt Earnest when his birth was registered. He studied at Havelock School and then Nelson College and won a scholarship to study at Canterbury College, University of New Zealand where he was president of the debating society, among other things. After gaining his BA, MA and BSc, and doing two years of research at the forefront of electrical technology, in 1895 Rutherford travelled to England for postgraduate study at the Cavendish Laboratory, University of Cambridge (1895–1898), and he briefly held the world record for the distance over which electromagnetic waves could be detected. During the investigation of radioactivity he coined the terms alpha and beta to describe the two distinct types of radiation emitted by thorium and uranium.

Middle years

In 1898 Rutherford was appointed to the chair of physics at McGill University in Montreal, Canada, where he did the work that gained him the Nobel Prize in Chemistry in 1908. In 1900 he gained a DSc from the University of New Zealand, and from 1900 to 1903 he was joined at McGill by the young Frederick Soddy (Nobel Prize in Chemistry, 1921) and they collaborated on research into the transmutation of elements. Rutherford had demonstrated that radioactivity was the spontaneous disintegration of atoms. He noticed that a sample of radioactive material invariably took the same amount of time for half the sample to decay – its "half-life" – and created a practical application using this constant rate of decay as a clock, which could then be used to help determine the age of the Earth, which turned out to be much older than most of the scientists at the time believed.

In 1900 he married Mary Georgina Newton (1876-1945); they had one daughter, Eileen Mary (1901-1930), who married Ralph Fowler.

In 1907 Rutherford took the chair of physics at the University of Manchester. There along with Hans Geiger and Ernest Marsden he carried out the Geiger-Marsden experiment, which demonstrated the nuclear nature of atoms. It was his interpretation of this experiment that led him to the Rutherford model of the atom, with a very small positively-charged nucleus orbited by electrons. In 1919 he became the first person to transmute one element into another when he converted nitrogen into oxygen through a nuclear reaction ¹⁴N(α,p)¹⁷O. In 1921, while working with Niels Bohr (who postulated that electrons moved in specific orbits), Rutherford theorized about the existence of neutrons, which could somehow compensate for the repelling effect of the positive charges of protons by causing an attractive nuclear force and thus keeping the nuclei from breaking apart. Rutherford's theory of neutrons was proved in 1932 by his associate James Chadwick, who in 1935 was awarded the Nobel Prize in Physics for this discovery.

Later years

He was knighted in 1914. In 1919 he returned to the Cavendish as Director. Under him, Nobel Prizes were awarded to Chadwick for discovering the neutron (in 1932), Cockcroft and Walton for an experiment which was to be known as splitting the atom using a particle accelerator, and Appleton for demonstrating the existence of the ionosphere. He was admitted to the Order of Merit in 1925 and in 1931 was created Baron Rutherford of Nelson, of Cambridge in the County of Cambridge, a title that became extinct upon his unexpected death in hospital following an operation for an umbilical hernia (1937). Since he was a peer, British protocol required that he be operated on by a titled doctor, and the delay cost him his life. He is interred in Westminster Abbey alongside J. J. Thomson.

Legacy

Rutherford's research, along with that of his protégé Sir Mark Oliphant, was instrumental in the convening of the Manhattan Project to develop the first nuclear weapons.

Many items bear Rutherford's name in honour of his life and work: Scientific discoveries

• the element rutherfordium, Rf, Z=104. (1997)
• craters on Mars and the Moon Institutions
• Rutherford Appleton Laboratory, a scientific research laboratory near Abingdon, Oxfordshire, UK.
• Rutherford College, a school in Auckland, New Zealand
• Rutherford College, a college at the University of Kent in Canterbury, UK
• the Rutherford Institute for Innovation at the University of Cambridge, UK
• Rutherford Intermediate School, Wanganui, New Zealand Buildings
• a building of the modern Cavendish Laboratory at the University of Cambridge, UK
• The Ernest Rutherford Physics Building at McGill University, Montreal, Canada
• a physics classroom in Portsmouth Grammar School, Hampshire, UK.
• the physics and chemistry building at the University of Canterbury, New Zealand
• The Coupland Building at the University of Manchester where Rutherford worked was renamed The Rutherford Building in 2006
• The Rutherford lecture theatre in the Schuster building at the University of Manchester Halls of residence
• Rutherford Residence Hall at Fairleigh Dickinson University in Madison, NJ, USA.
• a student hall at Loughborough University, Leicestershire, UK.
• Rochester and Rutherford Hall, a boarding house at the University of Canterbury, Christchurch, New Zealand. School houses
• at Cashmere High School, Christchurch, New Zealand
• at Corran School for Girls, Auckland, New Zealand
• at Island School, Hong Kong
• at Macleans College, Auckland, New Zealand
• at Mount Roskill Grammar School, Auckland, New Zealand
• at Nelson College, New Zealand, his own high school
• at Rangiora High School, Rangiora, New Zealand
• at Rangitoto College, Auckland, New Zealand
• at Shirley Boys' High School, Christchurch, New Zealand
• at St Andrews College, Christchurch, New Zealand
• at Stepney Green School, London, England
• at Tanjong Katong Secondary School, Singapore
• at Waimea College, Richmond, New Zealand
• at Westburn School in Christchurch Major streets
• Rutherford Close, a residential street in Abingdon, Oxfordshire, UK.
• Lord Rutherford Road in Brightwater, New Zealand - his birthplace.
• Rutherford Road in the biotech district of Carlsbad, California, USA.
• Rutherford Street in Nelson, New Zealand. Other
• The Rutherford Award at Thomas Carr College for excellence in VCE Chemistry, Australia
• Image on New Zealand $100 note.
• Rutherford was the subject of a play by Stuart Hoar.
• On the side of the Mond Laboratory on the site of the original Cavendish Laboratory in Cambridge, there is an engraving in Rutherford's memory in the form of a crocodile, this being the nickname given to him by its commissioner, his colleague Peter Kapitza. The initials of the engraver, Eric Gill, are visible within the mouth.

Publications

• Radio-activity (1904), 2nd ed. (1905), ISBN 978-1-60355-058-1
• Radioactive Transformations (1906), ISBN 978-160355-054-3
• Radiations from Radioactive Substances (1919)
• The Electrical Structure of Matter (1926)
• The Artificial Transmutation of the Elements (1933)
• The Newer Alchemy (1937)

See also

• Science and technology in Canada

References

Further reading

• R.H. Cragg (1971). "Lord Ernest Rutherford of Nelson (1871-1937)". Royal Institute of Chemistry Reviews 4 (4): 129–145.
• E. Marsden (1954). "The Rutherford Memorial Lecture, 1954. Rutherford-His Life and Work, 1871-1937". Proceedings of the Royal Society of London. Series A 226 (1166): 283–305.

External links

• Biography from Nobel prize official website
• Nobel Lecture The Chemical Nature of the Alpha Particles from Radioactive Substances
• The Rutherford Museum
• Rutherford Scientist Supreme
• Profile from American Public Broadcasting Service
• Profile from The New Zealand Edge
• Annotated bibliography for Ernest Rutherford from the Alsos Digital Library for Nuclear Issues
• Dictionary of New Zealand Biography
• Biography in 1966 Encyclopaedia of New Zealand
• Rutherford at Canterbury University College from The Rutherford Journal
• Rutherford's Timebomb Article on Rutherford's contribution to dating the Age of the Earth
• BBC Radio 4: In Our Time - Rutherford
• The Rutherford Collection at his alma mater the University of Canterbury