text: Two of these particles would be excited in a giant pairing vibration.
full_question: Two of these particles would be excited in a giant pairing vibration. In-beam and bottle experiments differ on the value of this particle's average lifetime by almost four standard deviations. The z-component of this particle's isospin is negative one-half. Calculating the beta factor requires the number of these particles that are "prompt". The r- and s-processes, both important to nucleosynthesis, involve the capture of this particle. The experiment that discovered these particles fired them into a sheet of paraffin wax. Water or graphite are commonly used to slow down "fast" examples of these particles in nuclear reactors. For 10 points, name these neutral nucleons.
first_sentence: Two of these particles would be excited in a giant pairing vibration.
raw_answer: neutrons