DLC-0139 ZZ-SIGMA-A.

ZZ-SIGMA-A.

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FORMAT: special format

NUMBER OF GROUPS: Photon interaction and absorption coefficients covering the energy range 1 KeV to 100 MeV.

NUCLIDES: MATERIALS: A150TE PLAST (H, C, N, O, F, Ca); Ac; Air (N, O, Ar); Sb; Ar; As; At; BAKELITE (C, H, O); Ba; BARSO4; Be; Bk;  Bi; BONE (H, C, N, O, Mg, P, S, Ca); B; Br; C552SHONKA P (H, C, O, F, Si); Cd; Ca; Cf; CAPINTEC (H, C, O, F, Si); C; Ce; Cs; Cl; Cr; Co; CONCRETE (H, O, Na, Mg, Al, Si, S, K, Ca, Fe); Cu; Cm; DELRIN (C, H, O); Dy; Er; Eu; FAT (H, C, N, O, S); F; Fr; FRICK8 (H, O, Na, S, Cl, Fe); Gd; Ga; Ge; Au; Hf; He; Ho; H; ICRP CORTICAL BONE (H, C, N, O, Mg, P, S, Ca, Zn); ICRP TISSUE (H, C, N, O, S, Mg, P, S, Cl, K, Ca, Fe, Zn); ICRU TISSUE (H, C, N, O); In; I; Ir; Fe; Kr;  Pb; LIFTLD (Li, F); Li; LUCITE (C, H, O); Lu; Mg; Mn; Hg; Mo; MUSCLE (H, C, N, O, S, Mg, P, S, K, Ca); Nd; Ne; Np; Ni; Nb; N; NYLON (H, C, N, O); O; Pd; P; Pt; Pu; Po; POLYETHYLENE (C, H); POLYSTYRENE (C, H); K; Pr; Pm; Pa; Ra; Re; Rh; Rb; Ru; Sm; Sc; Se; Si; Ag; SODIODIDE; Na; SOLWA1; SOLWA2; Sr; S; Ta; Te; Tb; Tl; Th; Tm; Sn; Ti; W; U; V; WATER (H, O); Xe; Yb; Y; Zn; Zr.

ORIGIN: HOWERTON, JRC

WEIGHTING SPECTRUM: --

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An extensive library of photon interaction coefficients has been developed by the Ontario Cancer Institute, Toronto, Ontario, Canada, based on the compilation of Plechaty, Cullen, and Howerton. In addition to partial cross section data, the following are given: mass attenuation coefficients, mass energy transfer coefficients, mass energy absorption coefficients, average energy transferred to electrons, average energy absorbed per interaction, and average stopping power of electrons. Partial interaction coefficients and absorption coefficients are useful in any radiation transport or other radiation analysis application.

The data from the Ontario Cancer Institute are given for 94 elements and 25 composite materials covering the energy range 1 KeV to 100 MeV. The reactions considered are coherent and incoherent scattering, photoelectric absorption, and pair production.

The energy absorption coefficients were determined by the methods described by Cunningham and Johns.

READX runs interactively.

The FORTRAN 77 data retrieval programs are designed for use on minicomputers. The main data file, containing tables for all materials, is converted to a direct access file by the RANDOM program. The retrieval program, READX, is used to locate the data for selected materials and output the data to a sequential file.

• D.K. TRUBEY: Informal Notes, ORNL (August 1988)

• J.R. CUNNINGHAM and H.E. JOHNS: "Calculations of the Average Energy Absorbed in Photon  Interactions"  Med.Phys. 7(1), 51-54 (Jan./Feb. 1980)

• E.F. PLECHATY, D.E. CULLEN, and R.J. HOWERTON: UCRL-50400, Vol. 6, Rev. 1 (National Technical Information Service Springfield VA, 1975)

• H.E. JOHNS and J.R. CUNNINGHAM: "The Physics of Radiology" Fourth Edition, Charles C. Thomas, Springfield, III. (1983)

DOS, Data General MV/family.

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.
Developed by:   Ontario Cancer Institute, Toronto, Ontario, Canada
Auxiliary Programs:   D.K. TRUBEY
                      Radiation Shielding Information Center
                      Oak Ridge National Laboratory
                      Oak Ridge, Tennessee, U. S. A