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Journal Articles

Estimated isotopic compositions of Yb in enriched $$^{176}$$Yb for producing $$^{177}$$Lu with high radionuclide purity by $$^{176}$$Yb($$d,x$$)$$^{177}$$Lu

Nagai, Yasuki*; Kawabata, Masako*; Hashimoto, Shintaro; Tsukada, Kazuaki; Hashimoto, Kazuyuki*; Motoishi, Shoji*; Saeki, Hideya*; Motomura, Arata*; Minato, Futoshi; Ito, Masatoshi*

Journal of the Physical Society of Japan, 91(4), p.044201_1 - 044201_10, 2022/04

https://doi.org/10.7566/JPSJ.91.044201
 Times Cited Count：2 Percentile：46.35(Physics, Multidisciplinary)

Recently, $$^{177}$$Lu is considered as one of the most important medical RIs for treating neuroendocrine tumors. A plan to produce $$^{177}$$Lu with high purity by using enriched $$^{176}$$Yb samples with irradiation of deuteron beams in accelerators has been discussed. However, since the other Yb isotopes contained in the Yb sample interacts with deuterons, Lu isotopes other than $$^{177}$$Lu are produced as impurities. Since the purity of $$^{177}$$Lu is important for medical use, a method to evaluate the impurity of Lu has been required. In this study, we proposed a new method to estimate production yields of each Lu isotopes in Yb samples with arbitrary isotopic compositions by using excitation functions of Yb($$d,x$$)Lu reactions and the particle transport calculation code PHITS. The method plays an important role in discussing the isotopic composition of enriched samples to produce high-purity $$^{177}$$Lu using accelerators.

Journal Articles

Large scale production of $$^{64}$$Cu and $$^{67}$$Cu via the $$^{64}$$Zn(n, p)$$^{64}$$Cu and $$^{68}$$Zn(n, np/d)$$^{67}$$Cu reactions using accelerator neutrons

Kawabata, Masako*; Motoishi, Shoji*; Ota, Akio*; Motomura, Arata*; Saeki, Hideya*; Tsukada, Kazuaki; Hashimoto, Shintaro; Iwamoto, Nobuyuki; Nagai, Yasuki*; Hashimoto, Kazuyuki*

Journal of Radioanalytical and Nuclear Chemistry, 330(3), p.913 - 922, 2021/12

https://doi.org/10.1007/s10967-021-07987-3
 Times Cited Count：7 Percentile：72.21(Chemistry, Analytical)

Both $$^{64}$$Cu and $$^{67}$$Cu are promising radionuclides in nuclear medicine. Production yields of these radionuclides were quantified by irradiating 55.4 g of natural zinc with accelerator neutrons. Clinically suitable $$^{64}$$Cu and $$^{67}$$Cu yields were estimated by experimental based numerical simulations using 100 g of enriched $$^{64}$$Zn and $$^{68}$$Zn, respectively, and elevated neutron fluxes from 40 MeV, 2 mA deuterons. A combined thermal- and resin-separation method was developed to isolate $$^{64}$$Cu and $$^{67}$$Cu from zinc, resulting in 73% separation efficiency and 97% zinc recovery. Such methods can provide large scale production of $$^{64}$$Cu and $$^{67}$$Cu for clinical applications.

Journal Articles

Anomalous radioisotope production for $$^{68}$$ZnO using polyethylene by accelerator neutrons

Tsukada, Kazuaki; Nagai, Yasuki*; Hashimoto, Shintaro; Minato, Futoshi; Kawabata, Masako*; Hatsukawa, Yuichi*; Hashimoto, Kazuyuki*; Watanabe, Satoshi*; Saeki, Hideya*; Motoishi, Shoji*

Journal of the Physical Society of Japan, 89(3), p.034201_1 - 034201_7, 2020/03

https://doi.org/10.7566/JPSJ.89.034201
 Times Cited Count：2 Percentile：22.16(Physics, Multidisciplinary)

We found anomalously large yields of $$^{67}$$Ga, $$^{66}$$Ga, $$^{rm 69m}$$Zn and $$^{64}$$Cu by neutron irradiation on a $$^{68}$$ZnO sample in a polyethylene shield. Neutron beams are generated from the $$^{9}$$Be($$d,n$$) reaction for 50 MeV deuterons. The yields obtained were more than 20 times larger than those in the unshielded sample. On the other hand, the yields of $$^{67}$$Ga, $$^{66}$$Ga, $$^{rm 69m}$$Zn and $$^{64}$$Cu from a metallic $$^{68}$$Zn sample and the yields of $$^{67}$$Cu, $$^{65}$$Ni and $$^{65}$$Zn from the $$^{68}$$ZnO and $$^{68}$$Zn samples were almost insensitive to the shield conditions. This finding would provide us a unique capability of accelerator neutrons to simultaneously produce a large amount of several radioisotopes, including proton induced reaction products, by using a single sample. The experimental data were compared with the yields estimated by using the Particle and Heavy Ion Transport code System and the result was discussed.

Journal Articles

$$^{99}$$Mo yield using large sample mass of MoO$$_{3}$$ for sustainable production of $$^{99}$$Mo

Tsukada, Kazuaki; Nagai, Yasuki*; Hashimoto, Kazuyuki*; Kawabata, Masako*; Minato, Futoshi; Saeki, Hideya*; Motoishi, Shoji*; Ito, Masatoshi*

Journal of the Physical Society of Japan, 87(4), p.043201_1 - 043201_5, 2018/04

https://doi.org/10.7566/JPSJ.87.043201
 Times Cited Count：10 Percentile：60.27(Physics, Multidisciplinary)

Journal Articles

SPECT imaging of mice with $$^{99m}$$Tc-radiopharmaceuticals obtained from $$^{99}$$Mo produced by $$^{100}$$Mo(n,2n)$$^{99}$$Mo and fission of $$^{235}$$U

Hashimoto, Kazuyuki; Nagai, Yasuki; Kawabata, Masako; Sato, Nozomi*; Hatsukawa, Yuichi; Saeki, Hideya; Motoishi, Shoji*; Ota, Masayuki; Konno, Chikara; Ochiai, Kentaro; et al.

Journal of the Physical Society of Japan, 84(4), p.043202_1 - 043202_4, 2015/04

https://doi.org/10.7566/JPSJ.84.043202
 Times Cited Count：8 Percentile：53(Physics, Multidisciplinary)

Journal Articles

New phenomenon observed in thermal release of $$^{99m}$$Tc from molten $$^{100}$$MoO$$_{3}$$

Kawabata, Masako; Nagai, Yasuki; Hashimoto, Kazuyuki; Saeki, Hideya; Motoishi, Shoji*; Sato, Nozomi*; Ota, Akio*; Shiina, Takayuki*; Kawauchi, Yukimasa*

Journal of the Physical Society of Japan, 84(2), p.023201_1 - 023201_4, 2015/02

https://doi.org/10.7566/JPSJ.84.023201
 Times Cited Count：6 Percentile：45.25(Physics, Multidisciplinary)

$$^{99m}$$Tc for medical use can be separated by thermochromatography from a molten $$^{99}$$MoO$$_{3}$$ sample. Effect of moist oxygen gas on the $$^{99m}$$Tc release from molten $$^{99}$$MoO$$_{3}$$ samples was investigated using a $$^{99}$$Mo/$$^{99m}$$Tc generator. $$^{99}$$Mo was produced with $$^{100}$$Mo(n,2n)$$^{99}$$Mo. A new phenomenon has been observed: release rate, separation- and recovery-efficiencies of $$^{99m}$$Tc were higher in the moist oxygen gas than those in the dry oxygen gas. The present result is a significant progress towards the stable production of a high quality $$^{99m}$$Tc from a molten MoO$$_{3}$$ sample with high separation efficiency. The result would also give us a new insight into the interaction between the moist oxygen gas and the molten MoO$$_{3}$$.

Journal Articles

High thermo-separation efficiency of $$^{99m}$$Tc from molten $$^{100}$$MoO$$_{3}$$ samples by repeated milking tests

Nagai, Yasuki; Kawabata, Masako; Sato, Nozomi; Hashimoto, Kazuyuki; Saeki, Hideya; Motoishi, Shoji*

Journal of the Physical Society of Japan, 83(8), p.083201_1 - 083201_4, 2014/07

https://doi.org/10.7566/JPSJ.83.083201
 Times Cited Count：10 Percentile：57.84(Physics, Multidisciplinary)

Journal Articles

Generation of radioisotopes with accelerator neutrons by deuterons

Nagai, Yasuki; Hashimoto, Kazuyuki; Hatsukawa, Yuichi; Saeki, Hideya; Motoishi, Shoji; Sonoda, Nozomi; Kawabata, Masako; Harada, Hideo; Kin, Tadahiro*; Tsukada, Kazuaki; et al.

Journal of the Physical Society of Japan, 82(6), p.064201_1 - 064201_7, 2013/06

https://doi.org/10.7566/JPSJ.82.064201
 Times Cited Count：43 Percentile：85.02(Physics, Multidisciplinary)

Journal Articles

Successful labeling of $$^{rm 99m}$$Tc-MDP using $$^{rm 99m}$$Tc separated from $$^{99}$$Mo produced by $$^{100}$$Mo($textit{n}$,2$textit{n}$)$$^{99}$$Mo

Nagai, Yasuki; Hatsukawa, Yuichi; Kin, Tadahiro; Hashimoto, Kazuyuki; Motoishi, Shoji; Konno, Chikara; Ochiai, Kentaro; Takakura, Kosuke; Sato, Yuichi*; Kawauchi, Yukimasa*; et al.

Journal of the Physical Society of Japan, 80(8), p.083201_1 - 083201_4, 2011/08

https://doi.org/10.1143/JPSJ.80.083201
 Times Cited Count：15 Percentile：65.33(Physics, Multidisciplinary)

We have for the first time succeeded to separate $$^{rm 99m}$$Tc from a Mo oxide sample irradiated by accelerator neutrons, and to formulate $$^{rm 99m}$$Tc-methylene diphosphonate ($$^{rm 99m}$$Tc-MDP). $$^{99}$$Mo, the mother nuclide of $$^{rm 99m}$$Tc, was produced by the $$^{100}$$Mo($textit{n}$,2$textit{n}$)$$^{99}$$Mo reaction using about 14 MeV neutrons provided at the Fusion Neutronics Source of Japan Atomic Energy Agency. The $$^{rm 99m}$$Tc was separated from $$^{99}$$Mo by the sublimation method, and its radionuclide purity was confirmed to be higher than 99.99%. The labeling efficiency of $$^{rm 99m}$$Tc-MDP was shown to be higher than 99%. These values exceed the United States Pharmacopeia requirements for a fission product, $$^{99}$$Mo. Consequently, a $$^{rm 99m}$$Tc radiopharmaceutical preparation formed by using the mentioned $$^{99}$$Mo can be a promising substitute for the fission product $$^{99}$$Mo. A longstanding problem to ensure a reliable and constant supply of $$^{99}$$Mo in Japan can be partially mitigated.

Journal Articles

In vivo recognition of Cyclopentadienyltricarbonylrhenium (CpTR) derivatives

Uehara, Tomoya*; Koike, Miho*; Nakata, Hideo*; Miyamoto, Shigehiko*; Motoishi, Shoji; Hashimoto, Kazuyuki; Oku, Naoto*; Nakayama, Morio*; Arano, Yasushi*

Nuclear Medicine and Biology, 30(3), p.327 - 334, 2003/04

https://doi.org/10.1016/S0969-8051(02)00437-7
 Times Cited Count：20 Percentile：50.16(Radiology, Nuclear Medicine & Medical Imaging)

no abstracts in English

Journal Articles

Experimental radioimmunotherapy with $$^{186}$$Re-MAG3-A7 anti-colorectal cancer monoclonal antibody; Comparison with $$^{131}$$I-counterpart

Kinuya, Seigo*; Yokoyama, Kunihiko*; Kobayashi, Katsutoshi; Motoishi, Shoji; Onoma, Katsuyuki; Watanabe, Naoto*; Shuke, Noriyuki*; Bunko, Hisashi*; Nichigishi, Takatoshi*; Tonami, Norihisa*

Annals of Nuclear Medicine, 15(3), p.199 - 202, 2001/06

https://doi.org/10.1007/BF02987831
 Times Cited Count：9 Percentile：31.12(Radiology, Nuclear Medicine & Medical Imaging)

no abstracts in English

Journal Articles

Methylxanthine sensitization of human colon cancer cells to $$^{186}$$Re-labeled monoclonal antibody

Kinuya, Seigo*; Yokoyama, Kunihiko*; Kudo, Miho*; Kasahara, Yoshihito*; Kobayashi, Katsutoshi; Motoishi, Shoji; Onoma, Katsuyuki; Bunko, Hisashi*; Nichigishi, Takatoshi*; Tonami, Norihisa*

Journal of Nuclear Medicine, 42(4), p.596 - 600, 2001/04

no abstracts in English

JAEA Reports

Measurement of tritium activity in the aluminum pipe of JRR-2 heavy water primary cooling system using imaging plate

Motoishi, Shoji; Kobayashi, Katsutoshi; Saeki, Hideya*

JAERI-Tech 2000-070, 34 Pages, 2000/12

JAERI-Tech-2000-070.pdf:5.19MB

no abstracts in English

Journal Articles

Production of $$^{186,188}$$Re and recovery of tungsten from spent $$^{188}$$W/$$^{188}$$Re generator

Kobayashi, Katsutoshi; Motoishi, Shoji; Terunuma, Kuzuo; Rauf, A. A.*; Hashimoto, Kazuyuki

Radiochemistry, 42(6), p.551 - 554, 2000/12

no abstracts in English

Journal Articles

Measurement of the effective neutron capture cross section of cesium-134 by triple neutron capture reaction method

Harada, Hideo; Nakamura, Shoji; Kato, Toshio; Kobayashi, Katsunori*; Motoishi, Shoji*; Tanase, Masakazu*

Journal of Nuclear Science and Technology, 36(8), p.635 - 640, 1999/08

https://doi.org/10.1080/18811248.1999.9726249
 Times Cited Count：3 Percentile：28.67(Nuclear Science & Technology)

None

Journal Articles

Thermal neutron cross section and resonance integral of the reaction of $$^{135}$$Cs(n,$$gamma$$)$$^{136}$$Cs; Fundamental data for the transmutation of nuclear waste

Hatsukawa, Yuichi*; Shinohara, Nobuo*; Hata, Kentaro*; Kobayashi, Katsunori*; Motoishi, Shoji*; Tanase, Masakazu*; Kato, Toshio; Nakamura, Shoji; Harada, Hideo

Journal of Radioanalytical and Nuclear Chemistry, 239(3), p.455 - 458, 1999/03

https://doi.org/10.1007/BF02349050
 Times Cited Count：2 Percentile：21.17(Chemistry, Analytical)

no abstracts in English

Journal Articles

Measurement of the Effective Neutron Capture Cross Section of Cesium-134 by Triple Neutron Capture Reaction Method

Harada, Hideo; Nakamura, Shoji; Kato, Toshio; Kobayashi, Katsunori*; Motoishi, Shoji*; Tanase, Masakazu*

Journal of Nuclear Science and Technology, 36(8), p.635 - 640, 1999/00

https://doi.org/10.1080/18811248.1999.9726249

None

Journal Articles

Thermal neutron cross section and resonance integral of the reaction of $$^{135}$$Cs(n,$$gamma$$)$$^{136}$$Cs; Fundamental data for the transmutation of nuclear waste

Hatsukawa, Yuichi; Shinohara, Nobuo; ; Kobayashi, Katsutoshi; Motoishi, Shoji; Tanase, Masakazu; *; *; Harada, Hideo*

Journal of Radioanalytical and Nuclear Chemistry, 239(3), p.455 - 458, 1999/00

https://doi.org/10.1007/BF02349050
 Times Cited Count：2 Percentile：75(Chemistry, Analytical)

no abstracts in English

Journal Articles

Measurement of thermal neutron cross section and resonance integral of the reaction $$^{135}$$Cs(n,$$gamma$$)$$^{136}$$Cs

Kato, Toshio; Nakamura, Shoji; Harada, Hideo; Hatsukawa, Yuichi*; Shinohara, Nobuo*; Hata, Kentaro*; Kobayashi, Katsunori*; Motoishi, Shoji*; Tanase, Masakazu*

Journal of Nuclear Science and Technology, 34(5), p.431 - 438, 1997/05

https://doi.org/10.1080/18811248.1997.9733686

no abstracts in English

Journal Articles

Measurement of thermal neutron capture cross section and resonance integral of Cs-135

Kato, Toshio; Nakamura, Shoji; Harada, Hideo; Hatsukawa, Yuichi*; Shinohara, Nobuo*; Hata, Kentaro*; Kobayashi, Katsunori*; Motoishi, Shoji*; Tanase, Masakazu*

Italian Physical Society Conference Proceedings 59, p.1335 - 1337, 1997/00

no abstracts in English

40 (Records 1-20 displayed on this page)