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Skobelev, I. Yu.*; Ryazantsev, S. N.*; Kulikov, R. K.*; Sedov, M. V.*; Filippov, E. D.*; Pikuz, S. A.*; Asai, Takafumi*; Kanasaki, Masato*; Yamauchi, Tomoya*; Jinno, Satoshi; et al.
Photonics (Internet), 10(11), p.1250_1 - 1250_11, 2023/11
Times Cited Count：0 Percentile：0(Optics)It is challenging to clearly distinguish the impacts of the optical field and collisional ionization in the evolution of the charge state of a plasma produced when matter interacts with high-intensity laser pulses. In this work, time-dependent calculations of plasma kinetics are used to show that it is possible only when low-density gaseous targets with sufficiently small clusters are used. In the case of Ar plasma, the upper limit of the cluster radius was estimated to be 
m.
Osawa, Takahito; Nagasawa, Shunsaku*; Ninomiya, Kazuhiko*; Takahashi, Tadayuki*; Nakamura, Tomoki*; Wada, Taiga*; Taniguchi, Akihiro*; Umegaki, Izumi*; Kubo, Kenya*; Terada, Kentaro*; et al.
ACS Earth and Space Chemistry (Internet), 7(4), p.699 - 711, 2023/04
Times Cited Count：4 Percentile：93.95(Chemistry, Multidisciplinary)The concentrations of carbon and other major elements in asteroid samples provide very important information on the birth of life on the Earth and the solar-system evolution. Elemental analysis using muonic X-rays is one of the best analytical methods to determine the elemental composition of solid materials, and notably, is the only method to determine the concentration of light elements in bulk samples in a non-destructive manner. We developed a new analysis system using muonic X-rays to measure the concentrations of carbon and other major elements in precious and expectedly tiny samples recovered from the asteroid Ryugu by spacecraft Hayabusa2. Here we report the development process of the system in 4 stages and their system configurations, The analysis system is composed of a stainless-steel analysis chamber, an acrylic glove box for manipulating asteroid samples in a clean environment, and Ge semiconductor detectors arranged to surround the analysis chamber. The performance of the analysis system, including the background level, which is crucial for the measurement, was greatly improved from the first stage to the later ones. Our feasibility study showed that the latest model of our muonic X-ray analysis system is capable of determining the carbon concentration in Hayabusa2's sample model with an uncertainty of less than 10 percent in a 6-day measurement.
Shimada, Hiroyuki*; Minami, Hirotake*; Okuizumi, Naoto*; Sakuma, Ichiro*; Ukai, Masatoshi*; Fujii, Kentaro; Yokoya, Akinari; Fukuda, Yoshihiro*; Saito, Yuji
Journal of Chemical Physics, 142(17), p.175102_1 - 175102_9, 2015/05
Times Cited Count：10 Percentile：38.6(Chemistry, Physical)Shimada, Hiroyuki*; Fukao, Taishi*; Minami, Hirotake*; Ukai, Masatoshi*; Fujii, Kentaro; Yokoya, Akinari; Fukuda, Yoshihiro*; Saito, Yuji
Journal of Chemical Physics, 141(5), p.055102_1 - 055102_8, 2014/08
Times Cited Count：16 Percentile：53.96(Chemistry, Physical)Shimada, Hiroyuki*; Fukao, Taishi*; Minami, Hirotake*; Ukai, Masatoshi*; Fujii, Kentaro; Yokoya, Akinari; Fukuda, Yoshihiro*; Saito, Yuji
Chemical Physics Letters, 591, p.137 - 141, 2014/01
Times Cited Count：9 Percentile：33.36(Chemistry, Physical)Murakami, Hiroyuki; Minami, Kentaro*
Radioisotopes, 53(3), p.197 - 205, 2004/03
no abstracts in English
S.B.Samat*; Oi, Yoshihiro; Taki, Mitsumasa; ; Yoshida, Makoto; Minami, Kentaro
JAERI-Tech 95-010, 51 Pages, 1995/03
no abstracts in English
; Minami, Kentaro
Proc. of an Int. Symp. on Measurement Assurance in Dosimetry, 0, p.649 - 657, 1994/00
no abstracts in English
Murakami, Hiroyuki; Minami, Kentaro; R.V.Griffith*
Radiation Protection Dosimetry, 54(1), p.19 - 23, 1994/00
Times Cited Count：4 Percentile：42.35(Environmental Sciences)no abstracts in English
Murakami, Hiroyuki; Minami, Kentaro
Radioisotopes, 42(11), p.647 - 658, 1993/11
no abstracts in English
*; Murakami, Hiroyuki; Minami, Kentaro
Firumu Bajji Nyusu, 0(200), p.3 - 8, 1993/08
no abstracts in English
Minami, Kentaro
Dekomisshoningu Giho, (6), p.13 - 19, 1992/11
no abstracts in English
Minami, Kentaro
Firumu Bajji Nyusu, 0(189), p.1 - 5, 1992/09
no abstracts in English
Minami, Kentaro
Nagase FB Dayori, 0(173), p.6 - 7, 1992/05
no abstracts in English
Minami, Kentaro
ESI-News, 10(4), p.135 - 139, 1992/00
no abstracts in English
Minami, Kentaro
Hoshasen, 61(7), p.741 - 742, 1992/00
no abstracts in English
Murakami, Hiroyuki; Minami, Kentaro
Nihon Genshiryoku Gakkai-Shi, 33(8), p.747 - 756, 1991/08
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Minami, Kentaro
RANDEC Nyusu, 0(8), p.2 - 5, 1991/03
no abstracts in English
Yamaguchi, Yasuhiro; Minami, Kentaro
JAERI-M 90-234, 34 Pages, 1991/01
no abstracts in English
Yoshida, Makoto; Yoshizawa, Michio; Minami, Kentaro
Radioisotopes, 39(9), p.396 - 399, 1990/09
no abstracts in English
