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Cs in environment by use of the coincidence methodHirade, Tetsuya; Katayama, Atsushi; Masaki, Nobuyuki
Radioisotopes, 64(5), p.311 - 318, 2015/05
The quantity of Cesium radioisotopes is estimated with full absorption peaks on the energy spectra measured by 
-ray detectors such as Ge semiconductor detector. The heavy shield box made of Lead is needed to obtain reliable data, because the detection efficiency is in inverse proportion to square of the distance between the detectors and the radioactive materials. We have noticed that Cs emits two -rays, 605 keV and 796 keV, with high efficiency, and that there are almost no radio isotopes which emit two -rays as Cs does in environment. In the case of coincidence measurements of two -rays, the detection efficiency is in inverse proportion to the fourth power of the distance between the detectors and the radioactive materials. Therefore the contamination with radioisotopes around the detectors do not affect to the count of the coincidence events. Hence, it is possible to estimate the quantity of Cs by in-situ and nondestructive measurement.
Ln
O
(Ln = lanthanide; M = Hf, Zr, Ce, U, Th); Structure, property, and applicationsNakamura, Akio; Masaki, Nobuyuki; Otobe, Haruyoshi; Hinatsu, Yukio*; Wang, J.*; Takeda, Masuo*
Pure and Applied Chemistry, 79(10), p.1691 - 1729, 2007/10
Times Cited Count：14 Percentile：47.12(Chemistry, Multidisciplinary)no abstracts in English
Eu-M
ssbauer spectroscopic and X-ray diffraction study of the Eu
(Ce
Zr
)O
and LnEuZrO(Ln=lanthanide) systemsMasaki, Nobuyuki; Nakamura, Akio; Furuuchi, Fumihito*; Hinatsu, Yukio*
Journal of Physics and Chemistry of Solids, 66(2-4), p.312 - 317, 2005/02
Times Cited Count：10 Percentile：42.74(Chemistry, Multidisciplinary)no abstracts in English
Eu Mssbauer spectroscopic study on the EuMO
(0
y1.0)(M=Th, U)Masaki, Nobuyuki; Otobe, Haruyoshi; Nakamura, Akio; Harada, Daijitsu*; Ito, Kentaro*; Sasaki, Yoshinobu*; Hinatsu, Yukio*
Journal of Nuclear Science and Technology, 39(Suppl.3), p.217 - 220, 2002/11
no abstracts in English
ssbauer spectroscopic studies of 
Np in aqueous solutionsNakada, Masami; Masaki, Nobuyuki; Yamashita, Toshiyuki
Journal of Nuclear Science and Technology, 39(Suppl.3), p.426 - 428, 2002/11
no abstracts in English
Eu-Mssbauer spectroscopic study of the HfEuO(
)(0x1.0) systemHarada, Daijitsu*; Hinatsu, Yukio*; Masaki, Nobuyuki; Nakamura, Akio
Journal of the American Ceramic Society, 85(3), p.647 - 652, 2002/03
no abstracts in English
; 
U and 
O NMR studyIkushima, Kenji; Tsutsui, Satoshi; Haga, Yoshinori; Yasuoka, Hiroshi; Walstedt, R. E.; Masaki, Nobuyuki; Nakamura, Akio; Nasu, Saburo*; Onuki, Yoshichika
Physical Review B, 63(10), p.104404_1 - 104404_11, 2001/03
Times Cited Count：85 Percentile：94.08(Materials Science, Multidisciplinary)no abstracts in English
U NMR study of antiferromagnet UOIkushima, Kenji; Yasuoka, Hiroshi; Tsutsui, Satoshi; Nasu, Saburo*; Masaki, Nobuyuki; Nakamura, Akio; Ueda, Yutaka*
Physica B; Condensed Matter, 281-282, p.197 - 199, 2000/06
Times Cited Count：2 Percentile：15.67(Physics, Condensed Matter)no abstracts in English
at 25KMasaki, Nobuyuki; Nakada, Masami; Tsutsui, Satoshi; Nakamura, Akio; Yamashita, Toshiyuki
Physica B; Condensed Matter, 281-282, p.256 - 257, 2000/06
Times Cited Count：4 Percentile：27.84(Physics, Condensed Matter)no abstracts in English
Eu-Mssbauer spectroscopic study of the fluorite-type oxide solid solutions, EuMO (M=Zr,Ce)(0y1.0)Masaki, Nobuyuki; Guillermo, N. R. D.; Otobe, Haruyoshi; Nakamura, Akio; Izumiyama, Yuki*; Hinatsu, Yukio*
Advances in Science and Technology, 29, p.1233 - 1240, 2000/00
no abstracts in English
NiO
Yoshii, Kenji; Abe, Hideki*; Masaki, Nobuyuki; Nakamura, Akio
Proceedings of the 8th International Conference on Ferrites (ICF-8), p.278 - 280, 2000/00
no abstracts in English
Np Moessbauer spectra and coordination numbers of Np atoms in neptunyl(V) compoundsSaeki, Masakatsu; Nakada, Masami; Nakamoto, Tadahiro*; Yamashita, Toshiyuki; ; Krot, N. N.*
Journal of Radioanalytical and Nuclear Chemistry, 239(2), p.221 - 225, 1999/00
Times Cited Count：7 Percentile：49.7(Chemistry, Analytical)no abstracts in English
) of 
UTsutsui, Satoshi*; Nasu, Saburo*; Nakada, Masami; ; Saeki, Masakatsu; *; *; Nakamura, Akio
Journal of the Physical Society of Japan, 67(8), p.2641 - 2644, 1998/08
Times Cited Count：8 Percentile：53.74(Physics, Multidisciplinary)no abstracts in English
Saeki, Masakatsu; Nakada, Masami; Nakamoto, Tadahiro*; ; Yamashita, Toshiyuki
Journal of Alloys and Compounds, 271-273, p.176 - 179, 1998/00
Times Cited Count：4 Percentile：39.22(Chemistry, Physical)no abstracts in English
Np Moessbauer spectroscopic study on pentavalent neptunium glycolate complexNakamoto, Tadahiro*; Nakada, Masami; ; Saeki, Masakatsu; Yamashita, Toshiyuki
Journal of Radioanalytical and Nuclear Chemistry, 227(1-2), p.137 - 141, 1998/00
Times Cited Count：2 Percentile：38.16(Chemistry, Analytical)no abstracts in English
Np and U Moessbauer measurementsNakada, Masami; Saeki, Masakatsu; ; Tsutsui, Satoshi*
Journal of Radioanalytical and Nuclear Chemistry, 232(1-2), p.201 - 207, 1998/00
Times Cited Count：8 Percentile：57.28(Chemistry, Analytical)no abstracts in English
(Ln=Sm,Eu,and Gd)*; Hinatsu, Yukio*; ; Saeki, Masakatsu
Journal of Solid State Chemistry, 138(2), p.342 - 346, 1998/00
Times Cited Count：17 Percentile：55.3(Chemistry, Inorganic & Nuclear)no abstracts in English
Tsutsui, Satoshi*; Nakada, Masami; Kobayashi, Yasuhiro*; ; Saeki, Masakatsu; Nasu, Saburo*; Nakamura, Akio; Haga, Yoshinori; Homma, Tetsuo*; Yamamoto, Etsuji; et al.
Physics of Strongly Correlated Electron Systems (JJAP Series 11), p.266 - 268, 1998/00
no abstracts in English
NbO(0.5≦x≦2)Nakamura, Akio; ; Nakada, Masami; Saeki, Masakatsu; *; Akimitsu, Jun*
Ceramic Transactions, 71, p.295 - 306, 1996/00
no abstracts in English
Nakashima, Mikio;
Radiation Physics and Chemistry, 47(2), p.241 - 245, 1996/00
no abstracts in English
