Neutron absorption barns for thermal neutrons and 60.9 barns for resonance integral.
2.
Despite the constant area under resonance a resonance integral, which determines the absorption, increases with increasing target temperature.
3.
Unusually for an isotope with even mass number, 232 U has a significant neutron absorption fission ( thermal neutrons, resonance integral ) as well as for neutron capture ( thermal, resonance integral ).
4.
Unusually for an isotope with even mass number, 232 U has a significant neutron absorption fission ( thermal neutrons, resonance integral ) as well as for neutron capture ( thermal, resonance integral ).
5.
Two of the most commonly specified measures are the cross-section for thermal neutron absorption, and resonance integral which considers the contribution of absorption peaks at certain neutron energies specific to a particular nuclide, usually above the thermal range, but encountered as neutron moderation slows the neutron down from an original high energy.
6.
Some 155 Eu is also produced by successive neutron capture on 153 Eu ( nonradioactive, 350 barns thermal, 1500 resonance integral, yield is about 5 times as great as 155 Eu ) and 154 Eu ( half-life 8.6 years, 1400 barns thermal, 1600 resonance integral, fission yield is extremely small because beta decay stops at 154 Sm ); however the differing cross sections mean that both 155 Eu and 154 Eu are destroyed faster than they are produced.
7.
Some 155 Eu is also produced by successive neutron capture on 153 Eu ( nonradioactive, 350 barns thermal, 1500 resonance integral, yield is about 5 times as great as 155 Eu ) and 154 Eu ( half-life 8.6 years, 1400 barns thermal, 1600 resonance integral, fission yield is extremely small because beta decay stops at 154 Sm ); however the differing cross sections mean that both 155 Eu and 154 Eu are destroyed faster than they are produced.
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