Speaker
Description
Tungsten is applied to a target at proton accelerator facilities, e.g., ESS and COMET (J-PARC). Additionally, tungsten is used as a shielding material, such as the ADS facility by JAEA [1]. Thus, activation of tungsten by high-energy protons receives attention because residual $\gamma$-ray dose rate has impact on a maintenance schedule. To derive the dose rate, nuclide production cross section is required. Although there are previous studies of the $^{\rm nat}$W(p,X) reactions [2,3], there remain nuclides which have not measured yet. Also, nuclear reaction models can predict the nuclide production cross sections. However, the prediction accuracy is not fully understood currently. Hence, further measurement of the reactions in question should be performed. Then, we did an activation experiment of the $^{\rm nat}$W(p,X) reactions with GeV-energy proton incidence (0.4, 1.3, 2.2, and 3.0 GeV) at J-PARC following the same manner in Ref. [4].
As a result, a total of 140 nuclides via the $^{\rm nat}$W(p,X) reactions were acquired. In this poster, some of the results are presented. According to the average C/E values for obtained nuclides, JENDL/HE-2007 [5] reproduces our Exp. data within 30% for heavy nuclides. In our poster, comparison with nuclear reaction models in PHITS [6] is also presented.
References
[1] Iwamoto H., Meigo S., Nakano K. $\textit{et al}$., Radiation Shielding Analysis of the Upper Structure of an Accelerator-driven System, JAEA-Research 2021-012, (2022), Japanese.
[2] Titarenko Yu. E., Batyaev V. F., Titarenko A. Yu. $\textit{et al}$., Measurement and Simulation of the Cross Sections for Nuclide Production in $^{\rm nat}$W and $^{181}$Ta Targets Irradiated with 0.04- to 2.6-GeV Protons, Physics of Atomic Nuclei, 74(4), (2011), pp. 551–572.
[3] Michel R., Gloris M., Protoschill J. $\textit{et al}$., Cross Sections for the Production of Radionuclides by Proton-Induced Reactions on W, Ta, Pb and Bi from Thresholds up to 2.6 GeV, J. Nucl. Sci. Technol., 39(2), (2014), pp. 242-245.
[4] Takeshita H., Meigo S., Matsuda H. $\textit{et al}$., Measurement of nuclide production cross sections for proton-induced reactions on Mn and Co at 1.3, 2.2, and 3.0 GeV, Nucl. Instrum. Meth. B, 511, (2022), pp. 30-41.
[5] Watanabe Y., Kosaka K., Kunieda S. $\textit{et al}$., Status of JENDL high energy file, J. Korean Phys. Soc., 59 (2011), pp. 1040-1045.
[6] Sato T., Iwamoto Y., Hashimoto S. $\textit{et al}$., Recent improvements of the particle and heavy ion transport code system – PHITS version 3.33, J. Nucl. Sci. Technol., 61(1), (2024), pp. 127-135.
