Which of the following undergo fission reactions easily by slow-moving neutrons?
Correct answer: A. U-235, Pu-239
- A. U-235, Pu-239
- B. Pu-239, Th-234
- C. U-238, Rn-232
- D. Th-234, U-238
Explanation
U-235 and Pu-239 are fissile materials that can undergo fission reactions with slow-moving neutrons. It's important to note that the term "fissile" specifically refers to materials capable of sustaining a nuclear fission chain reaction, while "fissionable" includes materials that can undergo fission reactions but may not be capable of sustaining a chain reaction. U-235 and Pu-239 are both fissile materials and are central to the field of nuclear technology.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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