nucreonics DATA SHEET no. 1 
Shielding Constants 
Gamma-Ray Scattering from Thin Scatterers 
By DAVID G. CHAPPELL 
Knolls Atomic Power Laboratory* 
General Electric Company, Schenectady, New York 
E; P ES e° N M 
1072 
0.02 
0.01 180° ; 
Key: Z/A-Ne-M ae iso* 108 
Ej-P (right)-© i 120° 
Ee (left)-E, 0.06 100° 4 
0.08 0.02 90° 
0.1 ae io 
03 16° 
= 5 
: 4 
0.04 60° 10 
0.3 005 
= > 50° _ 5 
04 © = 0.06 > a 
Fd = < 10% = 
05 = ae = 
a ur OO Ao a § 
os 2 al ees |S E 
E - s € oe 
= o7 ¢€ 2 = 3 = 
c s s 2 5 108 = 
° 5 2 3 30° £ 5 § 
€ $ os & 6 F 3 3 
S$ — * 7° £ e 5 oe 
re 4 s 20.2 =) joes € 
°o > a oe c 2 i 
v o Ee © iJ e © 
5 Sos = e = 
% 5 |= 04 “os = .-¢ 3 
s w 20° 3 rc 
S £ 2 0.6 0.94 = = + 
~ a ~ 0.4 i 2 
: 08 oss oe =o Eee 
t 1.0 ° = 
Soe oie ne fee 
° 2 
8 
5 
1 ——— 
10° _, 1 
10 
EXAMPLE: Pb scatterer, M = 10 2 1o* 5 
gm;.. N, = 2.4 X 1074. An inci- 
dent photon of ZH; = 3 Mev scatters 5 
to @ = 72deg; .. P = 0.2, Er = 0.6 3 
Mev and ag = 0.7 X 10** cm?/e/ 
steradian. At D = 10cm, K = 1.7 4 
S10c* and) ie — Le xX 10n* 7 or 10° 
d@ = 0.2 X3 X17 X 10-41; Mev/ 5 5° 
em?/sec. 1073 
220 
