194 



ISOTOPIC TRACERS AND NUCLEAR RADIATIONS [Chap. 7 



Isotope 

 Z A 



21 So" 



Sc« 7 



Sc« 



Sc« 



Class 



Per cent 

 abundance 



22 Ti« 



Ti45 



Ti« 



Ti4» 

 Ti60 



Ti" 



23 V" 



E 



D 



A 

 A 



Type of 

 radiation 



0". 7, K 



Half-life 



85 days 



7.95 



7.75 



73.45 



5.51 



5.34 



0". 7. K(?) 



0" 



. 7 

 0-. 7 



/9 + 



3.4 days 



44 hr 



57 min 



0.58 sec 

 3.08 hr 



21 days 



6 min 

 72 days 



33 min 



Energy of radiation, Mev 



Particles 



0.36(0-) 



spect.; 



0.26(0-) 



abs. Al, 



coincid.; 

 • 0.4(0") 



abs. Al; 



0.26, 



1.5(0-) 



abs.; 



1.49(0") 



(weak) 



spect. 

 0.46 abs. Al 



0.64 spect.; 

 0.57 abs. 



Al 



1.8 abs. 



1.2 cl.ch. 



1.6 abs. 



0.45 abs. 

 Al; 0.36 

 abs. 



1.9 abs. 



7-rays 



0.88, 1.12 

 spect.; 

 coincid.; 

 1.25 abs. 

 Pb; 1.5 

 abs. Pb; 

 1.4 abs. 

 Pb 



No y(?) 



0.98, 1.33 



spect.; 

 1.35 spect.; 

 1.33 abs. 

 Pb 

 No y 



1.0 coincid. 

 abs.; 1.02 

 coincid. 

 abs. 



Produced 

 by 



Ca.-a-p 



Sc-d-p 



Sc-n-y 



Ti-d-a 



Ti-n-p 



Ca-a-p 



Ca-d-n 



Ca.-p-y 



Ti-n-p 



Ca-p-n 



Ca-d-2n 



Ti-n-p 



Ti-d-a 



V-n-a 



Ca-d-n 



Ti-n-p 



Ti-y-p 



Ca«(2.5 hr) 

 "-decay 



Ca« 

 (30 min) 

 0--decay 



Ca-a-M 



Ca-a-K 



Sc-p-n 



Sc-d-2n 



Ti-n-2n 



Ti-y-n 



Cu-d-8z20a 



Sc-p-n 



Ti-d-p 

 Ti-n-y 

 Ti-d-p 

 Ti-n-y 

 Cu-d-8zl4a 



Ti-d-n 

 Ti-p-n 



