Biomedical Engineering Reference
In-Depth Information
Fig. 8.12
Mass energy-absorption coefficients for various
materials. [Reprinted with permission from K. Z. Morgan and
J. E. Turner, eds.,
Principles of Radiation Protection,
Wiley, New
York (1967). Copyright 1967 by John Wiley & Sons.]
Tab l e 8 . 3
Mass Attenuation, Mass Energy-Transfer, and Mass
Energy-Absorption Coefficients (cm
2
g
-1
) for Photons in Water
and Lead
Photon Energy
Water
Lead
(MeV)
µ
/
ρ
µ
tr
/
ρ
en
/
ρ
µ
/
ρ
µ
tr
/
ρ
µ
en
/
ρ
0.01
5.33
4.95
4.95
131.
126.
126.
0.10
0.171
0.0255
0.0255
5.55
2.16
2.16
1.0
0.0708
0.0311
0.0310
0.0710
0.0389
0.0379
10.0
0.0222
0.0163
0.0157
0.0497
0.0418
0.0325
100.0
0.0173
0.0167
0.0122
0.0931
0.0918
0.0323
Source
: Based on P. D. Higgins, F. H. Attix, J. H. Hubbell,
S. M. Seltzer, M. J. Berger, and C. H. Sibata,
Mass
Energy-Transfer and Mass Energy-Absorption Coefficients,
Including In-Flight Positron Annihilation for Photon Energies
1 keV to 100 MeV,
NISTIR 4680, National Institute of
Standards and Technology, Gaithersburg, MD (1991).
ence in the mass energy-transfer and mass energy-absorption coefficients at much
lower energies.
