Monte Carlo simulation and parameterized treatment on the effect of nuclear elastic scattering in high-energy proton radiography

XU Hai-Bo; ZHENG Na

doi:10.1088/1674-1137/39/7/078201

Chinese Physics C> 2015, Vol. 39> Issue(7) : 078201 DOI: 10.1088/1674-1137/39/7/078201

Monte Carlo simulation and parameterized treatment on the effect of nuclear elastic scattering in high-energy proton radiography

XU Hai-Bo ,
ZHENG Na

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Abstract：
A version of Geant4 has been developed to treat high-energy proton radiography. This article presents the results of calculations simulating the effects of nuclear elastic scattering for various test step wedges. Comparisons with experimental data are also presented. The traditional expressions of the transmission should be correct if the angle distribution of the scattering is Gaussian multiple Coulomb scattering. The mean free path (which depends on the collimator angle) and the radiation length are treated as empirical parameters, according to transmission as a function of thickness obtained by simulations. The results can be used in density reconstruction, which depends on the transmission expressions.

References

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Amann J F, Espinoza C J, Gomez J J et al. High-Energy Test of Proton Radiography Concepts. Los Alamos National Laboratory, LA-UR-97-1520. 1997[2] King N S P, Ables E, Alrick K R et al. Nuclear Instruments and Methods in Physics Research A, 1999, 424(efeq1): 84[3] Aufderheide III M B, Park H-S, Hartouni E P et al. Proton Radiography as a Means of Material Characterization. Lawrence Livermore National Laboratory. UCRL-JC-134595. 1999[4] Rigg P A et al. Phys. Rev. B, 2008, 77: 220101[5] Neri F, Walstrom P L. Nuclear Instruments and Methods in Physics Research B, 2005, 229: 425[6] Morris C L, Ables E, Alrick K R et al. Journal of Applied Physics, 2011, 109: 104905[7] XU Hai-Bo. High Power Laser and Particle Beams, 2006, 18(efeq3): 477--482 (in Chinese)[8] WEI Tao, YANG Guo-Jun, LONG Ji-Dong et al. Chinese Physics C, 2013, 37(efeq6): 068201[9] Mottershead C T, Zumbro J D. Proceedings of the 1997 Particle Accelerator Conference. Vancouver B C, Canada, 1997, 1397[10] Agostinelliae S, Allisonas J, Amako K et al. Nuclear Instruments and Methods in Physics Research A, 2003, 506: 250[11] Zumbro J D, Acuff A, Bull J S et al. Radiation Protection Dosimetry, 2005, 117(efeq4): 447[12] Hughes H G, Brown F B, Bull J S et al. Radiation Protection Dosimetry, 2005, 116(1--4): 109[13] Zumbro J D, Acuff A, Bull J S et al. Proton Radiography Applications with MCNP Los Alamos National Laboratory. 5LA-UR-04-2997. 2004

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XU Hai-Bo and ZHENG Na. Monte Carlo simulation and parameterized treatment on the effect of nuclear elastic scattering in high-energy proton radiography[J]. Chinese Physics C, 2015, 39(7): 078201. doi: 10.1088/1674-1137/39/7/078201

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Received: 2014-09-18
Revised: 2015-02-25

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沈阳化工大学材料科学与工程学院沈阳 110142

Monte Carlo simulation and parameterized treatment on the effect of nuclear elastic scattering in high-energy proton radiography

XU Hai-Bo
ZHENG Na

Received Date: 2014-09-18
Accepted Date: 2015-02-25
Available Online: 2015-07-05

Abstract: A version of Geant4 has been developed to treat high-energy proton radiography. This article presents the results of calculations simulating the effects of nuclear elastic scattering for various test step wedges. Comparisons with experimental data are also presented. The traditional expressions of the transmission should be correct if the angle distribution of the scattering is Gaussian multiple Coulomb scattering. The mean free path (which depends on the collimator angle) and the radiation length are treated as empirical parameters, according to transmission as a function of thickness obtained by simulations. The results can be used in density reconstruction, which depends on the transmission expressions.