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-electron states of heavy-fermion superconductor NpPd
Al
and rare-earth- and actinide-based isostructural compoundsMetoki, Naoto
Journal of the Physical Society of Japan, 89(2), p.025001_1 - 025001_2, 2020/02
Times Cited Count：1 Percentile：12.02(Physics, Multidisciplinary)Good correspondence of the 
and 
- coupling scheme can be realized in the -electron states of the heavy-fermion superconductor NpPdAl and the isostructural family. The rare-earth and actinide elements are under a common strong uniaxial point charge potential with tetragonal point symmetry 
. The systematic development of the -electron states can be understood in the coupling scheme of 
configuration (the number of electrons 
). We can find the corresponding states in - coupling scheme with three -orbitals 
, and 
determined from CePdAl with 
configuration.
Yokoyama, Kenji; Jin, Tomoyuki; Hirai, Yasushi*; Hazama, Taira
JAEA-Data/Code 2015-009, 120 Pages, 2015/07
JAEA-Data-Code-2015-009.pdf:1.93MB
The second version of the versatile reactor analysis code system, MARBLE2, has been developed. A lot of new functions have been added inMARBLE2 by using the base technology developed in the first version (MARBLE1). Introducing the remaining functions of the conventional code system (JOINT-FR and SAGEP-FR), MARBLE2 enables one to execute almost all analysis functions of the conventional code system with the unified user interfaces of its subsystem, SCHEME. In particular, the sensitivity analysis functionality is available in MARBLE2. On the other hand, new built-in solvers have been developed, and existing ones have been upgraded. Furthermore, some other analysis codes and libraries developed in JAEA have been consolidated and prepared in SCHEME. In addition, several analysis codes developed in the other institutes have been additionally introduced as plug-in solvers. Consequently, 
-ray transport calculation and heating evaluation become available. As for another subsystem, ORPHEUS, various functionality updates and speed-up techniques have been applied based on user experience of MARBLE1 to enhance its usability.
-electron systemsKubo, Katsunori; Hotta, Takashi
Physica B; Condensed Matter, 378-380, p.1081 - 1082, 2006/05
Times Cited Count：4 Percentile：22.76(Physics, Condensed Matter)In order to investigate multipole ordering in -electron systems from a microscopic viewpoint, we study the so-called 
models on three kinds of lattices, simple cubic (sc), bcc, and fcc, based on a - coupling scheme with -electron hopping integrals through 
bonding. From the model, we derive an effective model for each lattice structure by using the second-order perturbation theory with respect to . By further applying mean-field theory to the effective model, we find a 
antiferro-quadrupole transition for the sc lattice, a 
antiferro-octupole transition for the bcc lattice, and a longitudinal triple-
octupole transition for the fcc lattice.
-electron systems on the basis of a - coupling schemeKubo, Katsunori; Hotta, Takashi
Physical Review B, 72(14), p.144401_1 - 144401_12, 2005/10
Times Cited Count：30 Percentile：72.79(Materials Science, Multidisciplinary)We investigate microscopic aspects of multipole ordering in -electron systems with emphasis on the effect of lattice structure. For the purpose, we construct -electron models on three kinds of lattices, simple cubic (sc), bcc, and fcc, in a tight-binding approximation on the basis of a - coupling scheme. Then, an effective model is derived in the strong-coupling limit for each lattice with the use of second-order perturbation theory with respect to . By applying mean-field theory to such effective models, we find multipole ordered states depending on the lattice structure. For the sc lattice, a antiferro-quadrupole transition occurs at a finite temperature and at further lowering temperature, we find another transition to a ferromagnetic state. For the bcc lattice, a antiferro-octupole ordering occurs first, and then, a ferromagnetic phase transition follows it. Finally, for the fcc lattice, we find a single phase transition to the longitudinal triple- octupole ordering.
-
model for octupole ordering in NpOKubo, Katsunori; Hotta, Takashi
Physical Review B, 72(13), p.132411_1 - 132411_4, 2005/10
Times Cited Count：37 Percentile：77.56(Materials Science, Multidisciplinary)In order to examine the origin of octupole ordering in NpO, we propose a microscopic model constituted of neptunium 
and oxygen 
orbitals. To study multipole ordering, we derive effective multipole interactions from the - model by using the fourth-order perturbation theory in terms of - hopping integrals. Analyzing the effective model numerically, we find a tendency toward antiferro-octupole ordering.
-decay half-lives of new neutron-rich rare-earth isotopes 
Pm, 
Sm, and 
GdIchikawa, Shinichi; Asai, Masato; Tsukada, Kazuaki; Haba, Hiromitsu*; Nagame, Yuichiro; Shibata, Michihiro*; Sakama, Minoru*; Kojima, Yasuaki*
Physical Review C, 71(6), p.067302_1 - 067302_4, 2005/06
Times Cited Count：18 Percentile：74.03(Physics, Nuclear)The new neutron-rich raer-earth isotopes Pm, Sm, and Gd produced in the proton-induced fission of 238U were identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport sysetm. The half-lives of Pm, Sm, and Gd were determined to be 1.5
0.2s, 2.40.5s, and 4.81.0s, respectively. The partial decay scheme of Gd wes constructed for - coincidence data. The improved half-life values of 25.62.2s wes obtained for the previously identified isotope Tb. The half-lives measured in the present study are in good agreement with the theoretical predictions calculated by the second generation of the gross theory with the atomic masses evaluated by the Audei and Wapstra.
Kubo, Katsunori; Hotta, Takashi
Physical Review B, 71(14), p.140404_1 - 140404_4, 2005/04
Times Cited Count：62 Percentile：87.28(Materials Science, Multidisciplinary)In order to examine the mysterious ordered phase of NpO from a microscopic viewpoint, we investigate an -electron model on an fcc lattice constructed based on a - coupling scheme. First, an effective model with multipole interactions is derived in the strong-coupling limit. Numerical analysis of the model clearly indicates that the interactions for 
and moments are relevant to the ground state. Then, by applying mean-field theory to the simplified model including only such interactions, we conclude that longitudinal triple- octupole order is realized in NpO through the combined effects of multipole interactions and anisotropy of the moment.
Nishihara, Tetsuo; Shimizu, Akira; Inagaki, Yoshiyuki; Tanihira, Masanori*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(4), p.517 - 524, 2003/12
no abstracts in English
Nagai, Haruyasu
Journal of Applied Meteorology, 41(2), p.160 - 176, 2002/02
no abstracts in English
Liu, X.; Homma, Toshimitsu
JAERI-Tech 2001-054, 49 Pages, 2001/08
JAERI-Tech-2001-054.pdf:1.54MB
no abstracts in English
Kugo, Teruhiko; Okubo, Tsutomu; *
JAERI-Research 99-057, p.29 - 0, 1999/09
JAERI-Research-99-057.pdf:1.77MB
no abstracts in English
CsHayakawa, Takehito*; J.Lu*; Furuno, Kohei*; *; *; *; Komatsubara, Tetsuro*; Oshima, Masumi; ; *; et al.
Z. Phys., A, 357(4), p.349 - 350, 1997/00
no abstracts in English
Yamazawa, Hiromi
Journal of Nuclear Science and Technology, 33(1), p.69 - 77, 1996/01
Times Cited Count：5 Percentile：45.11(Nuclear Science & Technology)no abstracts in English
*; Kunugi, Tomoaki
Therm. Sci. Eng., 4(3), p.1 - 7, 1996/00
no abstracts in English
Nagai, Ryoji; Kobayashi, Hideki*; Sasaki, Shigemi; Sawamura, Masaru; Sugimoto, Masayoshi; ; Kikuzawa, Nobuhiro; Okubo, Makio; Minehara, Eisuke; *; et al.
Nuclear Instruments and Methods in Physics Research A, 358, p.403 - 406, 1995/00
Times Cited Count：13 Percentile：76.19(Instruments & Instrumentation)no abstracts in English
; Kitao, Kensuke*
JAERI-M 91-037, 332 Pages, 1991/03
no abstracts in English
INFORMAT, 1(2), p.201 - 216, 1982/02
no abstracts in English
Re*; ;
Journal of the Physical Society of Japan, 46(4), p.1067 - 1074, 1979/00
Times Cited Count：5no abstracts in English
SnJournal of the Physical Society of Japan, 45(4), p.1076 - 1084, 1978/04
Times Cited Count：1no abstracts in English
Sn and the 6517-keV level in 
SnJournal of the Physical Society of Japan, 45(4), p.1085 - 1091, 1978/04
Times Cited Count：0no abstracts in English
