正电子产生 B+-decay (22Na -22Ne et v.+y(1.28 MeV)) pair prodc) Some Cyclotron-produced Radionuclides Common Production Natural abundance Product Decay Mode Reaction of Target Isotope(%) C B 10B(d,n)C 19.7 B(p,n)C 80.3 I3N B+ 12C(d,n)13N 98.9 0 B+ 14N(d,n)15O 99.6 18F B*,EC 20Ne(d,a)18F 90.9 22Na B*,EC 23Na(p,2n)2Na 100 æı Ûºª½øß ¯ÓÓ“ø Û‚ ÓÓ“ª ı ªı ı ´ª ı ¹ ¯ÔÚÓË ”ª ˜˜ °ø·Æ °Æ±º´½¨·±² ¯¹ Û‚ ªı ı ªÛ ˜