196 



JSOTOPIC TRACERS AND NUCLEAR RADIATIONS 



[Chap. 



Isotope 

 Z A 



25 Mn" 



Mn" 



Class 



26 Fe 62 



Fe" 



Per cent 

 abundance 



100 



Type of 

 radiation 



Half-life 



P . 7 



Fe" 

 Fe" 



F e 66 



Fe" 



F e 58 



Fe 69 



27 Co" 



Co" 



5.81 



91.64 

 2.21 

 0.34 



2.59 hr 



7.8 hr 



8.9 min 



K, no e~ 

 no /3 + 



+ . 7 



P\ 7. K 



4 yr 



46.3 days; 

 45.5 days; 

 47 days 



18.2 hr 



72 days 



Energy of radiation, Mev 



Particles 



0.75, 1.05, 

 2.86spect. 

 coincid.; 

 1.04, 2.88 

 spect. ; 

 0.75 

 (20 %), 

 1.04 

 (30 %), 

 2.81(50%) 

 spect. 



0.55 abs. Al 



0.26, 0.46 



spect., 



coincid. 



abs. 



1.50 spect. 



1.50 spect. 

 coincid.; 

 1.2 abs., 

 cl.ch., 

 coincid. 



7-rays 



2.06(20%), 

 1.77 

 (30 %), 

 0.822 

 (~100%) 

 spect.; 

 0.845, 

 1.81, 2.13 

 spect.; 2.7 

 (< 1 %) 

 D-y-n 

 reaction 



No 



1.10, 1.30 



spect. 



0.16, 0.21, 

 0.8, 1.2 



cl.ch. 

 recoil 



0.845, 1.26, 

 1.74, 2.01, 

 2.55, 3.25 

 spect., co- 

 incid.; 1.7 



Produced 

 by 



Cr-a-p 



Mn-n-y 



Mn-d-p 



Fe-d-a 



Fe-n-p 



Fe-y-p 



Co-n-a 



Cu-d-p2a or 



Cu-d- 



plaln 

 As-d-9z2la 



Cu-<f-4zl3a 



or Cu-d- 



4zl5a. 



parent of 



Mn"™ 

 Cr-a-n 

 Fe-n-2n 

 Fe-7-w 

 Cu-d-4zl2<z 



or 



Cu-<f-4zl4<i 



Mn-4-2n 

 Mn-p-n 

 Fe-d-p 

 Co"/3+- 

 decay 



Fe-d-p 

 Fe-n-y 

 Co-n-p 

 Co-d-2p 

 Cxi-d-a2p or 



Cu-d-2a 

 As-d-Sz\Sa 

 Bi-d 



Fe-d-n 

 Fe-P-y 

 Cu-d-3zlQa 



or 



Cu-<f-3zl2a 

 As-d-7z22a 

 Fe-d-2n 

 Fe-a-np 

 m-d-a 

 Cu-d-3z9a 



or 



