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Journal Articles

Neutron emission spectrum from gold excited with 16.6 MeV linearly polarized monoenergetic photons

Kirihara, Yoichi; Nakashima, Hiroshi; Sanami, Toshiya*; Namito, Yoshihito*; Itoga, Toshiro*; Miyamoto, Shuji*; Takemoto, Akinori*; Yamaguchi, Masashi*; Asano, Yoshihiro*

Journal of Nuclear Science and Technology, 57(4), p.444 - 456, 2020/04

 Times Cited Count:4 Percentile:62.49(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Measurement of angular dependent neutron production from thick target bombarded with 140-MeV protons

Iwamoto, Yosuke; Satoh, Daiki; Hagiwara, Masayuki*; Iwase, Hiroshi*; Kirihara, Yoichi*; Yashima, Hiroshi*; Nakane, Yoshihiro; Nakashima, Hiroshi; Nakamura, Takashi*; Tamii, Atsushi*; et al.

Nuclear Technology, 168(2), p.340 - 344, 2009/11

 Times Cited Count:5 Percentile:35.99(Nuclear Science & Technology)

It is important to calculate neutron production from thick targets at forward angle near 0 degree and backward angle near 180 degree for the shielding design of proton accelerator facilities, and the accuracy should be determined by experimental data. There are, however, few experimental data near 0 degree, and no data near 180 degree in the energy region above 100 MeV. Neutron energy spectra at 0, 90 and 180 degrees produced from thick graphite and iron targets by 140 MeV protons were measured. It was found that the calculation with JENDL-HE was more suitable for the shielding design of proton accelerator facilities in the forward direction.

Journal Articles

Measurement of thick target neutron yields at 0$$^{circ}$$ bombarded with 140, 250 and 350 MeV protons

Iwamoto, Yosuke; Taniguchi, Shingo*; Nakao, Noriaki*; Itoga, Toshio*; Yashima, Hiroshi*; Nakamura, Takashi*; Satoh, Daiki; Nakane, Yoshihiro; Nakashima, Hiroshi; Kirihara, Yoichi*; et al.

Nuclear Instruments and Methods in Physics Research A, 593(3), p.298 - 306, 2008/08

 Times Cited Count:12 Percentile:61.82(Instruments & Instrumentation)

Neutron energy spectra at 0$$^{circ}$$ produced from stopping-length graphite, aluminum, iron and lead targets bombarded with 140, 250 and 350 MeV protons were measured at the neutron TOF course in RCNP of Osaka University. The neutron energy spectra were obtained by using the time-of-flight technique in the energy range from 10 MeV to incident proton energy. To compare the experimental results, Monte Carlo calculations with the PHITS and MCNPX codes were performed using the JENDL-HE and the LA150 evaluated nuclear data files, the ISOBAR model implemented in PHITS, and the LAHET code in MCNPX. It was found that these calculated results at 0$$^{circ}$$ generally agreed with the experimental results in the energy range above 20 MeV except for graphite at 250 and 350 MeV.

Oral presentation

Radiation effects of the boron nano-belt on the electronic conductivity

Kirihara, Kazuhiro*; Kawaguchi, Kenji*; Shimizu, Yoshiki*; Sasaki, Takeshi*; Koshizaki, Naoto*; Kimura, Kaoru*; Yamada, Yoichi; Yamamoto, Hiroyuki; Shamoto, Shinichi

no journal, , 

Radiation effects of the boron nano-belt on the electronic conductivity have been studied.

Oral presentation

Radiation detection using boron nanobelts

Kirihara, Kazuhiro*; Kawaguchi, Kenji*; Shimizu, Yoshiki*; Sasaki, Takeshi*; Koshizaki, Naoto*; Kimura, Kaoru*; Yamada, Yoichi; Yamamoto, Hiroyuki; Shamoto, Shinichi

no journal, , 

We discuss the effects of neutron and $$gamma$$-ray irradiation on electrical transport of single-crystalline boron nanobelts toward a nano-scale radiation sensor device. Changes of electrical conductance of individual nanobelt before and after thermal neutron irradiation with low (10$$^{8}$$ cm$$^{-2}$$ s$$^{-1}$$) or high (3$$times$$10$$^{13}$$ cm$$^{-2}$$ s$$^{-1}$$) flux are presented.

Oral presentation

Effect of neutron irradiation on the electrical transport of boron nanobelt devices

Kirihara, Kazuhiro*; Kawaguchi, Kenji*; Shimizu, Yoshiki*; Sasaki, Takeshi*; Koshizaki, Naoto*; Kimura, Kaoru*; Yamada, Yoichi; Yamamoto, Hiroyuki; Shamoto, Shinichi

no journal, , 

Isotopic $$^{10}$$B atom has large thermal neutron capture cross section. $$^{7}$$Li atom and $$alpha$$ particle as a product of the neutron reaction can change the electrical transport property of the boron-rich semiconductor because they provide carrier doping and lattice defects. We successfully synthesized catalyst-free single-crystalline boron nanobelts (BNBs) and clarified the electrical transport and photoconduction mechanism of individual nanobelt. The BNB device is promising candidates for solid-state neutron sensors with both high resolution and good discrimination performance between neutron and $$gamma$$-ray. In the presentation, we discuss the performance of thermal neutron detection of BNB devices. Isotopic $$^{10}$$B enriched BNBs was synthesized to detect thermal neutrons efficiently. Electrical conductance of a nanobelt increased to eight times after the thermal neutron irradiation with a dose of 1.8$$times$$10$$^{14}$$ cm$$^{-2}$$ by the neutron reaction of $$^{10}$$B.

Oral presentation

Measurements of photoneutron spectrum using laser-Compton scattering photon

Kirihara, Yoichi; Namito, Yoshihito*; Sanami, Toshiya*; Itoga, Toshiro*; Nakashima, Hiroshi; Miyamoto, Shuji*; Asano, Yoshihiro*

no journal, , 

no abstracts in English

Oral presentation

Information disclosure of radiation measurement equipment in intranet

Masuyama, Koichi; Ishii, Daiki; Taki, Kosei; Kirihara, Yoichi; Nidaira, Atsushi; Tachibana, Haruo; Kawasaki, Katsuya

no journal, , 

no abstracts in English

Oral presentation

Photon energy dependence of photo-neutron production from the $$^{197}$$Au($$gamma$$,xn) reaction

Tran, T. K.*; Sanami, Toshiya*; Yamazaki, Hirohito*; Itoga, Toshiro*; Sakaki, Yasuhito*; Nguyen, L. T. T.*; Kirihara, Yoichi; Nakashima, Hiroshi*; Miyamoto, Shuji*; Asano, Yoshihiro*

no journal, , 

no abstracts in English

9 (Records 1-9 displayed on this page)
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