Figure: 25 TAC ยง289.231(k)(2)

MEAN QUALITY FACTORS, Q, AND FLUENCE PER UNIT
DOSE EQUIVALENT FOR MONOENERGETIC NEUTRONS

 

Neutron
Energy
(MeV)

Quality Factor**
(Q)

Fluence per Unit Dose Equivalent* (neutrons cm-2rem-1)

Fluence per Unit Dose Equivalent* (neutrons cm-2Sv-1)

(thermal)

2.5 x 10-8
1.0 x 10-7
1.0 x 10-6
1.0 x 10-5
1.0 x 10-4
1.0 x 10-3
1.0 x 10-2
1.0 x 10-1
5.0 x 10-1
1.0 
2.5 
5.0 
7.0 
10 
14 
20 
40 
60 
1.0 x 102
2.0 x 102
3.0 x 102
4.0 x 102

2 
2 
2 
2 
2 
2 
2.5 
7.5 
11 
11 
9 
8 
7 
6.5 
7.5 
8 
7 
5.5 
4 
3.5 
3.5 
3.5 

980 x 106
980 x 106
810 x 106
810 x 106
840 x 106
980 x 106
1,010 x 106
170 x 106
39 x 106
27 x 106
29 x 106
23 x 106
24 x 106
24 x 106
17 x 106
16 x 106
14 x 106
16 x 106
20 x 106
19 x 106
16 x 106
14 x 106

980 x 108
980 x 108
810 x 108
810 x 108
840 x 108
980 x 108
1,010 x 108
170 x 108
39 x 108
27 x 108
29 x 108
23 x 108
24 x 108
24 x 108
17 x 108
16 x 108
14 x 108
16 x 108
20 x 108
19 x 108
16 x 108
14 x 108

*Monoenergetic neutrons incident normally on a 30-centimeter diameter cylinder tissue-equivalent
phantom.

**Value of quality factor (Q) at the point where the DE is maximum in a 30-centimeter diameter
cylinder tissue-equivalent phantom.