Neutron yield from protons interacting thick targets at 113 MeV and 256 MeV and carbon ions of 290 MeV/u interacting in water

Authors: B. Faddegon and J. Ramos-Méndez, University of California San Francisco, US

Short description: For protons, the Monte Carlo simulations consisted of a cylindrical target irradiated with a uniformly distributed, zero divergence, monoenergetic (113 MeV or 256 MeV) proton beam of radius equal to the radius of the target. For carbon ions, a monoenergetic carbon ion beam of 0.25 cm radius, 290 MeV/u energy and zero divergence was simulated. The target was a water phantom of 18 cm thickness.

Geant-val layout: ProtonC12NeutronYield

Reference data: Experimental neutron yields from thick targets of different materials bombarded by protons of energies below 256 MeV were obtained from references [1][2]; for carbon ions interacting in water the data was obtained from reference [3].

[1 ]M. M. Meier, D. A. Clark, C. A. Goulding, J. B. McClelland, G. L. Morgan, C. E. Moss, W. B. Amian (1989) Differential Neutron Production Cross Sections and Neutron Yields from Stopping-Length Targets for 113-MeV Protons, Nucl. Sci. and Eng., 102(3), pp. 310-321.

[2] M. M. Meier, C. A. Goulding, G. L. Morgan, J. L. Ullmann (1990) Neutron Yields from Stopping- and Near-Stopping-Length Targets for 256-MeV Protons, Nucl. Sci. and Eng., 104(5), pp. 339-363.

[3] D. Satoh, T. Kajimoto, N. Shigyo, Y. Itashiki, Y. Imabayashi, Y. Koba, N. Matsufuji, T. Sanami, N. Nakao and Y. Uozumi (2016) Distributions of neutron yields and doses around a water phantom bombarded with 290-MeV/nucleon and 430-MeV/nucleon carbon ions, NIM B, 387, pp. 10-19. 10–9.

Tested EM physics constructors:

• G4EmStandardPhysics_option4

Tested Hadronic physics:

• QGSP_BIC_HP
• QGSP_BERT_HP

-- SusannaGuatelli - 2019-04-18