Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 68(8): 567-573 (2019)

特集Special Issues

7.2.4 重イオンによる核破砕反応生成物の測定7.2.4 Measurements of Spallation Products Induced by Heavy Ions

1京都大学複合原子力科学研究所Institute for Integrated Radiation and Nuclear Science, Kyoto University ◇ 590–0494 大阪府泉南郡熊取町朝代西2–1010 ◇ 2–1010 Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka 590–0494, Japan

2東北大学名誉教授Tohoku University, Professor Emeritus ◇ 980–8578 仙台市青葉区荒巻字青葉6–3 ◇ 6–3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980–8578, Japan

発行日:2019年8月15日Published: August 15, 2019


Irradiation experiments were performed to obtain systematic data of the reaction cross sections and the residual activities induced by high-energy charged particles from proton to Ar by using various samples inserted in Cu target. The induced radioactivities were measured with Ge detector. The obtained results revealed the following results. The mass-yield distribution decreases with increasing mass number difference between Cu and produced nuclides. The spatial distribution of residual activities also depends on the mass number difference between Cu and the produced nuclides. The residual activity steeply increases near the projectile range in some cases. These are attributed to the projectile fragmentation of the projectile ion for heavy ion irradiation. This systematic study is quite useful for designing high-energy heavy-ion accelerator facilities and for benchmark test of the heavy ion nuclear reaction simulation codes.

Key words: HIMAC (Heavy Ion Medical Accelerator in Chiba); activation cross section; induced radioactivity; spallation reaction; mass-yield distribution

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