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Luis Walter Alvarez


Source: https://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Luis_Walter_Alvarez_1961.jpg/34px-Luis_Walter_Alvarez_1961.jpg

Description. Lang: en

Luis Walter Alvarez (June 13, 1911 – September 1, 1988) was an American experimental physicist, inventor, and professor who was awarded the Nobel Prize in Physics in 1968 for development of the hydrogen bubble chamber enabling discovery of resonance states in particle physics. The American Journal of Physics commented, "Luis Alvarez was one of the most brilliant and productive experimental physicists of the twentieth century."After receiving his PhD from the University of Chicago in 1936, Alvarez went to work for Ernest Lawrence at the Radiation Laboratory at the University of California, Berkeley. Alvarez devised a set of experiments to observe K-electron capture in radioactive nuclei, predicted by the beta decay theory but never before observed. He produced tritium using the cyclotron and measured its lifetime. In collaboration with Felix Bloch, he measured the magnetic moment of the neutron.
In 1940 Alvarez joined the MIT Radiation Laboratory, where he contributed to a number of World War II radar projects, from early improvements to Identification friend or foe (IFF) radar beacons, now called transponders, to a system known as VIXEN for preventing enemy submarines from realizing that they had been found by the new airborne microwave radars. Enemy submarines would wait until the radar signal was getting strong and then submerge, escaping attack. But VIXEN transmitted a radar signal whose strength was the cube of the distance to the submarine so that as they approached the sub, the signal—as measured by the sub—got progressively weaker, and the sub assumed the plane was getting farther away and didn't submerge. The radar system for which Alvarez is best known and which has played a major role in aviation, most particularly in the post war Berlin airlift, was Ground Controlled Approach (GCA). Alvarez spent a few months at the University of Chicago working on nuclear reactors for Enrico Fermi before coming to Los Alamos to work for Robert Oppenheimer on the Manhattan project. Alvarez worked on the design of explosive lenses, and the development of exploding-bridgewire detonators. As a member of Project Alberta, he observed the Trinity nuclear test from a B-29 Superfortress, and later the bombing of Hiroshima from the B-29 The Great Artiste.
After the war Alvarez was involved in the design of a liquid hydrogen bubble chamber that allowed his team to take millions of photographs of particle interactions, develop complex computer systems to measure and analyze these interactions, and discover entire families of new particles and resonance states. This work resulted in his being awarded the Nobel Prize in 1968. He was involved in a project to x-ray the Egyptian pyramids to search for unknown chambers. With his son, geologist Walter Alvarez, he developed the Alvarez hypothesis which proposes that the extinction event that wiped out the non-avian dinosaurs was the result of an asteroid impact.
Alvarez was a member of the JASON Defense Advisory Group, the Bohemian Club, and the Republican Party.


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Luis Walter Alvarez

Luis Walter Alvarez

American physicist

  • Desc: Luis Walter Alvarez was an American experimental physicist, inventor, and professor who was awarded the Nobel Prize in Physics in 1968 for development of the hydrogen bubble chamber enabling discovery of resonance states in particle physics.
  • Wiki: https://en.wikipedia.org/wiki/Luis_Walter_Alvarez
  • Type: Person, Thing
  • Result Score: 5011.62
Walter Alvarez

Walter Alvarez

Professor

  • Desc: Walter Alvarez is a professor in the Earth and Planetary Science department at the University of California, Berkeley. He is most widely known for the theory that dinosaurs were killed by an asteroid impact, developed in collaboration with his father, Nobel Prize winning physicist Luis Alvarez.
  • Wiki: https://en.wikipedia.org/wiki/Walter_Alvarez
  • Type: Person, Thing
  • Result Score: 3.25
Alvarezsauridae

Alvarezsauridae

Dinosaur

  • Desc: Alvarezsauridae is a family of small, long-legged dinosaurs. Although originally thought to represent the earliest known flightless birds, a consensus of recent work suggests that they evolved from an early branch of maniraptoran theropods.
  • Wiki: https://en.wikipedia.org/wiki/Alvarezsauridae
  • Type: Thing
  • Result Score: 0.03
Chicxulub crater

Chicxulub crater

Impact crater

  • Desc: The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is located offshore near the town of Chicxulub, after which the crater is named.
  • Wiki: https://en.wikipedia.org/wiki/Chicxulub_crater
  • Type: Place, Thing
  • Result Score: 0.03

Cretaceous–Paleogene extinction event

Event

Helium-3

Helium-3

Isotope

  • Desc: Helium-3 is a light, stable isotope of helium with two protons and one neutron. Other than protium, helium-3 is the only stable isotope of any element with more protons than neutrons. Helium-3 was discovered in 1939.
  • Wiki: https://en.wikipedia.org/wiki/Helium-3
  • Type: Thing
  • Result Score: 0.02
Electron capture

Electron capture

Radioactive decay mode

  • Desc: Electron capture is a process in which the proton-rich nucleus of an electrically neutral atom absorbs an inner atomic electron, usually from the K or L electron shells.
  • Wiki: https://en.wikipedia.org/wiki/Electron_capture
  • Type: Thing
  • Result Score: 0.01

Lists of Note

Book by Shaun Usher

Gerta Keller

Paleontologist

  • Desc: Gerta Keller is a paleontologist who contests the Alvarez hypothesis that the impact of the Chicxulub impactor, or another large celestial body, caused the Cretaceous–Paleogene extinction event.
  • Wiki: https://en.wikipedia.org/wiki/Gerta_Keller
  • Type: Person, Thing
  • Result Score: 0.00

3581 Alvarez

Asteroid

  • Desc: 3581 Alvarez, provisional designation 1985 HC, is a carbonaceous asteroid and a very large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 13.7 kilometers in diameter.
  • Wiki: https://en.wikipedia.org/wiki/3581_Alvarez
  • Type: Thing
  • Result Score: 0.00

Jean Alvarez

Luis Walter Alvarez's daughter

  • Type: Person, Thing
  • Result Score: 0.00

Donald Alvarez

Luis Walter Alvarez's son

  • Type: Person, Thing
  • Result Score: 0.00

Bernice Alvarez Brownson

Luis Walter Alvarez's sister

  • Type: Person, Thing
  • Result Score: 0.00

Gladys Alvarez Mead

Luis Walter Alvarez's sister

  • Type: Person, Thing
  • Result Score: 0.00

Robert S. Alvarez

Luis Walter Alvarez's brother

  • Type: Person, Thing
  • Result Score: 0.00

Helen Alvarez

Luis Walter Alvarez's daughter

  • Type: Person, Thing
  • Result Score: 0.00
Andrew Benson

Andrew Benson

American biologist

  • Desc: Andrew Alm Benson was an American biologist and a professor of biology at the University of California, San Diego, until his retirement in 1989. He is known for his work in understanding the carbon cycle in plants.
  • Wiki: https://en.wikipedia.org/wiki/Andrew_Benson
  • Type: Person, Thing
  • Result Score: 0.00

Harriet Smyth

Luis Walter Alvarez's mother

  • Type: Person, Thing
  • Result Score: 0.00
Arthur H. Rosenfeld

Arthur H. Rosenfeld

Physicist

  • Desc: Arthur Hinton Rosenfeld was a UC Berkeley physicist and California energy commissioner, dubbed the "godfather of energy efficiency", for developing new standards which helped improve energy efficiency in California and subsequently worldwide.
  • Wiki: https://en.wikipedia.org/wiki/Arthur_H._Rosenfeld
  • Type: Person, Thing
  • Result Score: 0.00

Frank Asaro

Chemist

  • Desc: Frank Asaro was an Emeritus Senior Scientist at the Lawrence Berkeley National Laboratory associated with the University of California at Berkeley.
  • Wiki: https://en.wikipedia.org/wiki/Frank_Asaro
  • Type: Person, Thing
  • Result Score: 0.00

Roy Schwitters

Professor

  • Desc: Roy F. Schwitters is a professor of physics at the University of Texas at Austin. He was formerly a professor of physics at Harvard and Stanford. His undergraduate and doctoral degrees are both from MIT.
  • Wiki: https://en.wikipedia.org/wiki/Roy_Schwitters
  • Type: Person, Thing
  • Result Score: 0.00

Marcello Conversi

Italian physicist

  • Desc: Marcello Conversi was an Italian particle physicist. He is best known for his 1946 cosmic ray experiment where he showed that the "mesotron", now known as the muon, was not a strongly interacting particle.
  • Wiki: https://en.wikipedia.org/wiki/Marcello_Conversi
  • Type: Person, Thing
  • Result Score: 0.00

Night comes to the Cretaceous

Book by James L. Powell

  • Type: Book, Thing
  • Result Score: 0.00

Jan Smit

Dutch paleontologist

  • Desc: Jan Smit is a Dutch paleontologist. He was connected to the Faculty of Earth and Life Sciences of the VU University Amsterdam from 2003 to 2013 as Professor of Event Stratigraphy, studying rapid changes in the geological record related to mass extinctions.
  • Wiki: https://en.wikipedia.org/wiki/Jan_Smit_(paleontologist)
  • Type: Person, Thing
  • Result Score: 0.00
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