stringtranslate.com

Портал:Ядерные технологии

Портал ядерных технологий

Введение

Этот символ радиоактивности признан во всем мире.

Общие изображения -загрузить новую партию

Ниже приведены изображения из различных статей Википедии, посвященных ядерным технологиям.
Обновить с новыми вариантами ниже (очистить)

Избранная статья -показать еще

The Dayton Project was a research and development project to produce polonium during World War II, as part of the larger Manhattan Project to build the first atomic bombs. Work took place at several sites in and around Dayton, Ohio. Those working on the project were ultimately responsible for creating the polonium-based modulated neutron initiators that were used to begin the chain reactions in the atomic bombs.

The Dayton Project began in 1943 when Monsanto's Charles Allen Thomas was recruited by the Manhattan Project to coordinate the plutonium purification and production work being carried out at various sites. Scientists at the Los Alamos Laboratory calculated that a plutonium bomb would require a neutron initiator. The best-known neutron sources used radioactive polonium and beryllium, so Thomas undertook to produce polonium at Monsanto's laboratories in Dayton. While most Manhattan Project activity took place at remote locations, the Dayton Project was located in a populated, urban area. It ran from 1943 to 1949, when the Mound Laboratories were completed in nearby Miamisburg, Ohio, and the work moved there.

The Dayton Project developed techniques for extracting polonium from the lead dioxide ore in which it occurs naturally, and from bismuth targets that had been bombarded by neutrons in a nuclear reactor. Ultimately, polonium-based neutron initiators were used in both the gun-type Little Boy and the implosion-type Fat Man used in the atomic bombings of Hiroshima and Nagasaki respectively. The fact that polonium was used as an initiator was classified until the 1960s, but George Koval, a technician with the Manhattan Project's Special Engineer Detachment, penetrated the Dayton Project as a spy for the Soviet Union. (Full article...)

Selected picture - show another

Credit: Los Alamos National Laboratory
The Krakatau subcritical experiment is being prepared to be lowered into the floor of the tunnel of the U1a Complex at the Nevada Test Site.

Did you know?

  • ... that the area of Cultybraggan Camp has been a royal hunting ground, a prison for fervent Nazis and the site of an underground bunker intended for use in a nuclear war?
  • ... that after journalist Adele Ferguson's criticism of the U.S. Navy's sex discrimination attracted nationwide attention, she was offered a personal tour of a nuclear submarine?
  • ... that according to witnesses, the plutonium charge in the bomb used in the nuclear weapons test Gerboise Verte was transported in an economy car?
  • ... that during World War II, pilot G. E. Clements was removed from training for secret missions associated with the Manhattan Project when senior officers realized she was a woman?
  • ... that Project Ketch proposed the detonation of a 24-kiloton nuclear device in Pennsylvania to create a natural-gas storage reservoir?
  • ... that campaigning by climate activist Kimiko Hirata halted plans to build 17 new coal-fired power plants following the Fukushima nuclear disaster in Japan?

Related WikiProjects

Things you can do

Selected biography - show another

Richard Phillips Feynman (/ˈfnmən/; May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is known for the work he did in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model. For his contributions to the development of quantum electrodynamics, Feynman received the Nobel Prize in Physics in 1965 jointly with Julian Schwinger and Shin'ichirō Tomonaga.

Feynman developed a widely used pictorial representation scheme for the mathematical expressions describing the behavior of subatomic particles, which later became known as Feynman diagrams. During his lifetime, Feynman became one of the best-known scientists in the world. In a 1999 poll of 130 leading physicists worldwide by the British journal Physics World, he was ranked the seventh-greatest physicist of all time.

He assisted in the development of the atomic bomb during World War II and became known to the wider public in the 1980s as a member of the Rogers Commission, the panel that investigated the Space Shuttle Challenger disaster. Along with his work in theoretical physics, Feynman has been credited with having pioneered the field of quantum computing and introducing the concept of nanotechnology. He held the Richard C. Tolman professorship in theoretical physics at the California Institute of Technology.

Feynman was a keen popularizer of physics through both books and lectures, including a 1959 talk on top-down nanotechnology called There's Plenty of Room at the Bottom and the three-volume publication of his undergraduate lectures, The Feynman Lectures on Physics. Feynman also became known through his autobiographical books Surely You're Joking, Mr. Feynman! and What Do You Care What Other People Think?, and books written about him such as Tuva or Bust! by Ralph Leighton and the biography Genius: The Life and Science of Richard Feynman by James Gleick. (Full article...)

Nuclear technology news


5 November 2024 – Fukushima nuclear accident
A remote-controlled robot retrieves a piece of melted fuel from the Fukushima Daiichi Nuclear Power Plant, the first time a piece of melted fuel has been retrieved from a nuclear meltdown. (AP)
15 October 2024 –
Google signs an agreement with Kairos Power to use small nuclear reactors to generate the energy to power its artificial intelligence (AI) data centers. (BBC News)
11 October 2024 – 2024 Nobel Peace Prize
This year's Nobel Peace Prize is awarded to Japanese atomic bomb survivors group Nihon Hidankyo for "its efforts to achieve a world free of nuclear weapons and for demonstrating through witness testimony that nuclear weapons must never be used again". (The Washington Post) (Nobel Prize)

Related portals

Related topics

Subcategories

Category puzzle
Category puzzle
Select [►] to view subcategories

Associated Wikimedia

Более подробную информацию по этой теме можно найти в следующих родственных проектах Фонда Викимедиа :


  • Бесплатный репозиторий Commons
  • Wikibooks
    Бесплатные учебники и руководства
  • Wikidata
    Бесплатная база знаний
  • Wikinews
    Новости свободного контента
  • Wikiquote
    Коллекция цитат
  • Wikisource
    Библиотека свободного контента
  • Wikiversity
    Бесплатные инструменты обучения
  • Викисловарь
    и тезаурус
Откройте для себя Википедию с помощью порталов