Ernest Walton

Ernest Walton

Infobox_Scientist
name = Ernest Thomas Sinton Walton


image_width = 200px
caption = Ernest Walton
birth_date = birth date|1903|10|6
birth_place = Dungarvan, Ireland
death_date = death date |1995|6|25|
death_place = Belfast, Ireland
nationality = Republic of Ireland
field = Physics
work_institution = Trinity College Dublin
University of Cambridge
known_for = The first disintegration of an atomic nucleus by artificially accelerated protons ("splitting the atom")
prizes = nowrap|Nobel Prize in Physics (1951)
religion = Methodist |

Ernest Thomas Sinton Walton (6 October, 1903 – 25 June, 1995) was an Irish physicist and Nobel laureate for his work with John Cockcroft with "atom-smashing" experiments done at Cambridge University in the early 1930s. Walton is the only Irishman to have won a Nobel Prize in science.

Early years

Ernest Walton was born in Abbeyside, County Waterford, Ireland, to a Methodist minister father, Rev. John Walton (1874-1936) and Anna Sinton (1874-1906), growing up mostly in Ulster. In those days a general clergyman's family moved once every three years, and this practice carried Ernest and his family, while he was a small child, to counties Limerick and County Monaghan. He attended day schools in counties Down, Tyrone, and Wesley College Dublin before becoming a boarder at Methodist College Belfast in 1915, where he excelled in science and mathematics.

In 1922 Walton won scholarships to Trinity College, Dublin for the study of mathematics and science. He was awarded bachelor's and master's degrees from Trinity in 1926 and 1927, respectively. During these years at college, Walton received numerous prizes for excellence in physics and mathematics (seven prizes in all). Following graduation he was accepted as a research student at Trinity College, Cambridge, under the supervision of Sir Ernest Rutherford, Director of Cambridge University's Cavendish Laboratory. At the time there were four Nobel Prize laureates on the staff at the Cavendish lab and a further five were to emerge, including Walton and John Cockcroft. Walton was awarded his Ph.D. in 1931 and remained at Cambridge as a researcher until 1934.

During the early 1930s Walton and John Cockcroft collaborated to build an apparatus that split the nuclei of lithium atoms by bombarding them with a stream of protons accelerated inside a high-voltage tube (700 kilovolts). The splitting of the lithium nuclei produced helium nuclei. This was experimental verification of theories about atomic structure that had been proposed earlier by Rutherford, George Gamow, and others. The successful apparatus -- a type of particle accelerator now called the Cockcroft-Walton generator -- helped to usher in an era of particle-accelerator-based experimental nuclear physics. It was this research at Cambridge in the early 1930s that won Walton and Cockcroft the Nobel Prize in physics in 1951.

Career at Trinity College Dublin

Ernest Walton returned to Ireland in 1934 to became a Fellow of Trinity College Dublin in the physics department, and in 1946 was appointed professor with the grand old title "Erasmus Smith's Professor of Natural and Experimental Philosophy". Walton's lecturing was considered outstanding as he had the ability to present complicated matters in simple and easy-to-understand terms. His research interests were pursued with very limited resources, but yet he was able to study, in the late 1950s, the phosphorescent effect in glasses, secondary-electron emissions from surfaces under positive-ion bombardment, radiocarbon dating and low-level counting, and the deposition of thin films on glass.

Family life

Ernest Walton married Freda Wilson, daughter of an Irish Methodist Minister, on August 23, 1934. They had five children, Dr. Alan Walton (college lecturer in physics, Magdalene College, Cambridge), Mrs Marian Woods, Professor Philip Walton, Professor of Applied Physics, National University of Ireland, Galway, Jean Clarke and Winifred Walton.

Walton was a longtime member of the board of governors of Wesley College, Dublin. As a boy he attended Methodist College Belfast.

Later years

Although he retired from Trinity College Dublin in 1974, he retained his association with the Physics Department at Trinity up to his final illness. His was a familiar face in the tea-room. Shortly before his death he marked his lifelong devotion to Trinity by presenting his Nobel medal and citation to the college. [http://www.tcd.ie/Physics/history/walton/walton_biography.php Biography] He died in Belfast on June 25 1995, aged 91. He was widely respected, much admired, and regarded as a modest, unassuming man.

Honours

Walton and John Cockcroft were recipients of the 1951 Nobel Prize in Physics for their "work on the transmutation of the atomic nuclei by artificially accelerated atomic particles" (popularly known as "splitting the atom"). They are credited with being the first to disintegrate the lithium nucleus by bombardment with accelerated protons and identifying helium nuclei in the products. More generally, they had built an apparatus which showed that nuclei of various lightweight elements (such as lithium) could be split by fast-moving protons.

Walton and Cockcroft received the Hughes Medal of the Royal Society of London in 1938. In much later years -- and predominantly after his retirement in 1974 -- Walton received honorary degrees or conferrals from numerous British Isles and North American institutions.

The "Walton Causeway Park" in Dungarvan, Co. Waterford was dedicated in his honor with Walton himself attending the ceremony in 1989. After his death the Waterford Institute of Technology named a large building the "ETS Walton Building" and a plaque was placed on the site of his Co. Waterford birthplace. Other honours for Walton include the Walton Building at Methodist College, Belfast, the school where he had been a boarder for five years and the Walton Prize for Physics at Wesley College.

ee also

*John Cockcroft

References

Further reading

*

*

*

External links

* [http://www.nobel.se/physics/laureates/1951/walton-bio.html Ernest T. S. Walton – Biography] .
* [http://alsos.wlu.edu/qsearch.aspx?browse=people/Walton,+Ernest Annotated bibliography for Ernest Walton from the Alsos Digital Library for Nuclear Issues]

*

*
* [http://www.thebestquestion.com/ernestthomassintonwalton.htm Ernest Thomas Sinton Walton Timeline]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Ernest Walton — Ernest Walton. Ernest Thomas Sinton Walton (* 6. Oktober 1903 in Dungarvan, County Waterford; † 25. Juni 1995 in Belfast) war ein irischer Physiker und Nobelpreisträger für Physik …   Deutsch Wikipedia

  • Ernest Walton — Saltar a navegación, búsqueda Ernest Thomas Sinton Walton (6 de octubre de 1903 25 de junio de 1995) fue un físico irlandés, galardonado con el premio Nobel de Física de 1951 junto con Sir John Douglas Cockcroft. Walton nació en Dungarvan, hijo… …   Wikipedia Español

  • Ernest Walton — Pour les articles homonymes, voir Walton. Ernest Walton Ernest Thomas Sinton Walton (6 octobre 1903 25 juin 1995) est un physicien irlandais. Il est colauréat avec …   Wikipédia en Français

  • Ernest Walton — noun Irish physicist who (with Sir John Cockcroft in 1931) first split an atom (1903 1995) • Syn: ↑Walton, ↑E. T. S. Walton, ↑Ernest Thomas Sinton Walton • Instance Hypernyms: ↑nuclear physicist …   Useful english dictionary

  • Ernest Walton — …   Википедия

  • Ernest T. S. Walton — Ernest Walton Ernest Thomas Sinton Walton (* 6. Oktober 1903 in Dungarvan, County Waterford; † 25. Juni 1995 in Belfast) war ein irischer Physiker und Nobelpreisträger für Physik …   Deutsch Wikipedia

  • Ernest Thomas Sinton Walton — Ernest Walton Ernest Thomas Sinton Walton (* 6. Oktober 1903 in Dungarvan, County Waterford; † 25. Juni 1995 in Belfast) war ein irischer Physiker und Nobelpreisträger für Physik …   Deutsch Wikipedia

  • Ernest Thomas Sinton Walton — Ernest Walton Pour les articles homonymes, voir Walton. Ernest Thomas Sinton Walton (né le 6 octobre 1903, mort le 25 juin 1995) est un physicien irlandais, lauréat du prix Nobel de physique en 1951. Sommaire 1 Biographie 2 …   Wikipédia en Français

  • WALTON (E. T. S.) — WALTON Ernest Thomas Sinton (1903 1995) Fils d’un pasteur méthodiste irlandais, Ernest Thomas Sinton Walton, né à Dungarvan (comté de Waterford) le 6 octobre 1903, est décédé le 25 juin 1995 à Belfast. Après des études au Trinity College de… …   Encyclopédie Universelle

  • Walton (Familienname) — Walton ist ein englischer Familienname. Bekannte Namensträger Alice Walton (* 1949), Tochter von Sam Walton (Wal Mart) Ama Walton (* 1971), deutsche Rechtsanwältin und Schauspielerin Bill Walton (* 1952), US amerikanischer Basketballspieler Brent …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”