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Ninomiya, Kazuhiko*; Kubo, Kenya*; Inagaki, Makoto*; Yoshida, Go*; Chiu, I.-H. ; Kudo, Takuto*; Asari, Shunsuke*; Sentoku, Sawako*; Takeshita, Soshi*; Shimomura, Koichiro*; et al.
Scientific Reports (Internet), 14, p.1797_1 - 1797_8, 2024/01
Times Cited Count：0The amount of C in steel, which is critical in determining its properties, is strongly influenced by steel production technology. We propose a novel method of quantifying the bulk C content in steel non-destructively using muons. This revolutionary method may be used not only in the quality control of steel in production, but also in analyzing precious steel archaeological artifacts. A negatively charged muon forms an atomic system owing to its negative charge, and is finally absorbed into the nucleus or decays to an electron. The lifetimes of muons differ significantly, depending on whether they are trapped by Fe or C atoms, and identifying the elemental content at the muon stoppage position is possible via muon lifetime measurements. The relationship between the muon capture probabilities of C/Fe and the elemental content of C exhibits a good linearity, and the C content in the steel may be quantitatively determined via muon lifetime measurements. Furthermore, by controlling the incident energies of the muons, they may be stopped in each layer of a stacked sample consisting of three types of steel plates with thicknesses of 0.5 mm, and we successfully determined the C contents in the range 0.20 - 1.03 wt% depth-selectively, without sample destruction.
Nunoshiba, Tatsuo*; Yamauchi, Ayako*; Iwata, Rika*; Sato, Katsuya; Ono, Yutaka; Narumi, Issey*
JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 124, 2015/03
Nunoshiba, Tatsuo*; Sakata, Yayoi*; Yamauchi, Ayako*; Sato, Katsuya; Onodera, Takefumi*; Narumi, Issey*
JAEA-Review 2013-059, JAEA Takasaki Annual Report 2012, P. 118, 2014/03
Nunoshiba, Tatsuo*; Hirasawa, Yukei*; Yamauchi, Ayako*; Sato, Katsuya; Tejima, Kohei*; Onodera, Takefumi; Narumi, Issei
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 111, 2013/01
Kanasugi, Yuichi*; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Sakashita, Tetsuya; Kakizaki, Takehiko; Kobayashi, Yasuhiko; Takakura, Kaoru*
International Journal of Radiation Biology, 83(2), p.73 - 80, 2007/02
Times Cited Count：31 Percentile：87.87(Biology)no abstracts in English
Takakura, Kaoru*; Kanasugi, Yuichi*; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Sakashita, Tetsuya; Kakizaki, Takehiko; Kobayashi, Yasuhiko
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 112, 2007/02
no abstracts in English
Aotani, Hideaki*; Funayama, Tomoo; Wada, Seiichi*; Sakashita, Tetsuya; Kobayashi, Yasuhiko; Hasan, K.*; Kaul, S.*; Takakura, Kaoru*
no journal, ,
no abstracts in English
Kanasugi, Yuichi*; Funayama, Tomoo; Wada, Seiichi*; Sakashita, Tetsuya; Kobayashi, Yasuhiko; Takakura, Kaoru*
no journal, ,
no abstracts in English
Takakura, Kaoru*; Kanasugi, Yuichi*; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; Funayama, Tomoo; Sakashita, Tetsuya; Kakizaki, Takehiko
no journal, ,
no abstracts in English
Takakura, Kaoru*; Kanasugi, Yuichi*; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Sakashita, Tetsuya; Kakizaki, Takehiko; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Nunoshiba, Tatsuo*; Hirasawa, Yukei*; Yamauchi, Ayako*; Sakata, Yayoi*; Aihara, Reiko*; Sato, Katsuya; Tejima, Kohei; Onodera, Takefumi; Narumi, Issei
no journal, ,
no abstracts in English
Nunoshiba, Tatsuo*; Sakata, Yayoi*; Yamauchi, Ayako*; Reed, R.*; Sato, Katsuya; Onodera, Takefumi*; Narumi, Issey*
no journal, ,
The LOH (loss of heterozygosity) induction by various ion beam radiations was investigated in diploid . The ion beams 
C
, C
, 
He
and 
Ar
at the lowest dose (75, 75, 200 and 150 Gy, respectively), which had 30
50% lethality, induced LOH with 10-fold higher frequency. The LOH induction was predominantly (90%) resulted from homologous recombination. Pol
may be involved in the induction of LOH by ion beam radiations, because in the strain lacking Rev3, only slight induction of LOH was observed. In addition, the effects of 14 herbal extracts were examined on iron-beam radiation induced LOH, and ethanol extract of 
possessed inhibitory effect on LOH induced by C ion-beam radiation with the manner dependent on doses of extract.
