Table 5 Measured cross sections for the formation of 71As and 72As in proton irradiation of enriched 72Ge at three cyclotrons at FZJ.

From: Excitation functions of 72Ge(p,xn)72,71As reactions from threshold up to 45 MeV for production of the non-standard positron emitter 72As

Proton energy (MeV)

Cross section (mb) of 72As

Cross section (mb) of 71As

Cyclotron JULIC

 44.6 ± 0.3

42.4 ± 5.5

47.2 ± 6.1

 42.5 ± 0.3

48.1 ± 6.2

27.5 ± 3.6

 40.0 ± 0.3

44.2 ± 5.3

47.3 ± 6.1

 37.7 ± 0.4

22.7 ± 2.7

50.2 ± 6.5

 34.9 ± 0.4

28.6 ± 3.4

73.8 ± 9.6

 32.3 ± 0.4

29.3 ± 3.5

97.8 ± 12.7

 29.2 ± 0.4

33.2 ± 4.0

138.8 ± 18.0

 26.2 ± 0.4

44.5 ± 5.3

222.0 ± 28.8

 23.1 ± 0.4

60.6 ± 7.3

323.4 ± 42.0

 20.1 ± 0.4

113.4 ± 13.6

363.3 ± 47.2

 16.0 ± 0.5

350.1 ± 42.0

200.4 ± 26.0

 13.7 ± 0.5

649.7 ± 77.9

34.5 ± 4.5

 11.1 ± 0.5

713.0 ± 85.5

 

Cyclotron BC-1710

 16.4 ± 0.2

337.8 ± 37.2

283.5 ± 34.0

 16.0 ± 0.2

419.3 ± 46.1

263.8 ± 31.6

 13.7 ± 0.2

694.5 ± 76.4

6.6 ± 0.8

 12.5 ± 0.2

669.5 ± 73.6

 

 11.7 ± 0.3

712.2 ± 78.3

 

 10.8 ± 0.3

751.4 ± 82.6

 

 10.2 ± 0.3

615.3 ± 67.7

 

 9.3 ± 0.3

546.4 ± 60.1

 

 8.3 ± 0.4

502.9 ± 55.3

 

 7.3 ± 0.4

409.7 ± 45.1

 

Cyclotron C30-XP

 24.2 ± 0.3

52.8 ± 6.3

317.6 ± 41.3

 20.3 ± 0.3

108.1 ± 12.9

399.1 ± 51.9

 16.4 ± 0.4

347.3 ± 41.7

196.5 ± 25.5

 16.0 ± 0.4

418.0 ± 50.2

167.8 ± 21.8

 14.6 ± 0.4

631.8 ± 75.8

39.8 ± 5.2

 13.2 ± 0.5

654.9 ± 78.6

 

 12.1 ± 0.5

706.6 ± 84.8

 
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