Structure via PubChem · Public domain (PubChem)
plutonium-240
Sign in to saveAlso known as Pu-240, 240Pu, Plutonium 240
Plutonium-240 (' or Pu-240') is an isotope of plutonium formed when plutonium-239 captures a neutron without undergoing fission. The detection of its spontaneous fission led to its discovery in 1944 at Los Alamos and had important consequences for the Manhattan Project.
In the Vinony graph
Within Vinony's link graph, plutonium-240 is referenced by 101 other articles, and connects out to radioactive decay, decay chain and isotope of plutonium.
It sits within the topics Fertile materials, Isotope content page and Isotopes of plutonium.
Its subject is documented across 14 Wikipedia language editions.
Key facts
- Isotope.symbol
- Pu
- Isotope.image
- Plutonium-240.svg
- Isotope.mass_number
- 240
- Isotope.mass
- 240.053812
- Isotope.num_neutrons
- 146
- Isotope.num_protons
- 94
- Isotope.abundance
- Trace
- Isotope.decay_mode1
- Alpha decay
- Isotope.decay_energy1
- 5.256
- Isotope.decay_product
- Uranium-236
- Isotope.decay_symbol
- U
- Isotope.decay_mass
- 236
via Wikipedia infobox
Chemical data
- Formula
- Pu
- Molecular weight
- 240.05381 g/mol
- IUPAC name
- plutonium-240
- SMILES
- [240Pu]
- InChIKey
- OYEHPCDNVJXUIW-AHCXROLUSA-N
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Wikidata facts
- Instance of
- isotope of plutonium
- Subclass of
- plutonium
- Has part
- plutonium
- Mass
- 240.053811812
Show 10 more facts
- atomic number
- 94
- neutron number
- 146
- half-life
- 6561.0
- spin quantum number
- 0.0
- parity quantum number
- 1
- mass excess
- 50125.38
- binding energy
- 1813450.08
- Commons category
- Plutonium-240
- canonical SMILES
- [240Pu]
- chemical formula
- Pu
Sources (8)
via Wikidata · CC0
~4 min read
Encyclopedic overview
5 sectionsContents
- Nuclear properties
- Nuclear weapons
- See also
- References
- External links
Plutonium-240 (' or Pu-240') is an isotope of plutonium formed when plutonium-239 captures a neutron without undergoing fission. The detection of its spontaneous fission led to its discovery in 1944 at Los Alamos and had important consequences for the Manhattan Project.
As with the other major plutonium isotopes, the normal decay leads to a more-stable isotope of uranium (236U) and in effect no further decay chain on human timescales. Over geologic time it would follow the thorium series.
Excerpted from Wikipedia’s “plutonium-240” article, available under the CC BY-SA 4.0 licence.