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Nuclear Fission02:50

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Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large...
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Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
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Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
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The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons...
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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
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The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
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Production of Synthetic Nuclear Melt Glass
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A zero-knowledge protocol for nuclear warhead verification.

Alexander Glaser1, Boaz Barak2, Robert J Goldston3

  • 1Department of Mechanical and Aerospace Engineering, Princeton University, E-Quad, Olden Street, Princeton, New Jersey 08544, USA.

Nature
|June 27, 2014
PubMed
Summary
This summary is machine-generated.

This study introduces a novel nuclear warhead verification method using zero-knowledge protocols. This approach ensures high confidence in item authenticity without revealing sensitive data, enhancing arms control security.

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Area of Science:

  • Nuclear physics
  • Information security
  • Arms control verification

Background:

  • Nuclear arms control verification faces a paradox: ensuring authenticity without revealing sensitive data.
  • Existing inspection systems with 'information barriers' are vulnerable to tampering and unauthorized access.

Purpose of the Study:

  • To demonstrate a new approach to nuclear warhead verification using zero-knowledge protocols.
  • To develop a method that verifies nuclear warheads without measuring or storing sensitive information.

Main Methods:

  • Utilizing energetic neutrons to interrogate submitted items.
  • Performing differential measurements of neutron transmission and emission.
  • Applying zero-knowledge protocols to ensure data privacy during verification.

Main Results:

  • Achieved a high degree of discrimination in detecting material diversion from test objects.
  • Demonstrated that the verification process reveals zero sensitive information.
  • Confirmed the viability of a physical zero-knowledge system for nuclear verification.

Conclusions:

  • The proposed zero-knowledge protocol offers a secure and effective method for nuclear warhead verification.
  • This technique enhances arms control by providing high confidence without compromising sensitive data.
  • The physical zero-knowledge system has potential applications in secure data computation and comparison for confidential information.