ceev ceev neutrons txhais
Kev ceev ceev neutrons yog cov neutrons dawb tsim nyob rau hauv nuclear fission tshua, thiab lawv lub zog kev ua haujlwm tuaj yeem ncav cuag 1 megaelectron volts (1.6 × 10 J13 Joules, sib zog ceev yog li 14000 km / s, sib npaug li 5% ntawm lub teeb hluav taws xob. Lawv yog hu rau neutrons sai kom paub qhov txawv lawv ntawm thermal neutrons thiab lub zog siab neutrons tsim nyob rau hauv cosmic rays lossis nrawm. Neutrons tsim nyob rau hauv cov tshuaj tiv thaiv nuclear ua raws li Maxwell-Boltzmann kev faib tawm, thiab lawv lub zog ntawm 0 txog 14 megaelectron volts. Lub zog nruab nrab ntawm neutrons tsim los ntawm uranium −235 yog 2 megaelectron volts, thiab ntau dua ib nrab ntawm cov neutron tsis nrawm neutrons. Yog li ntawd, neutrons tsim los ntawm fission ntawm uranium −235 tsis tuaj yeem cuam tshuam cov khoom siv loj (xws li uranium −238 thiab −232).