摘要: Abstract The time taken for a negative meson, stopping in solid, to reach its lowest Bohr orbit about nucleus, is discussed, with special reference the possibility of “trapping” long bound insulators. It shown that there are more ways which this can happen than dealt Fermi and Teller's discussion ; an approximate calculation made spent trap. results consistent experimental observations on π μ mesons. For heavy mesons (mass∼900 me ), approach nucleus found be normally 10-13-10-12 sec., but trapping may expected certain circumstances times up 10-5 sec.
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