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151.
Tsutsui S. Nakada M. Nasu S. Honma T. Tokiwa Y. Aoki D. Wisniewski P. Haga Y. Ōnuki Y. 《Hyperfine Interactions》2002,141(1-4):237-242
We have determined the distribution of the 5f-quadrupoles and detected the 5f-quadrupole order in the uranium intermetallics, uranium dipnictides and UPd3, with 238U Mössbauer spectroscopy. We have declared that the distribution of the 5f-qaudrupoles depends on the magnetic sequence in uranium dipnictides. The distribution of the 5f-quadrupole is spherical in UBi2, while those are oblate within c-plane in UP2, UAs2 and USb2. We have observed the sudden drop of the recoil-free fraction above the transition temperature of the quadrupole order in UPd3. The present result suggests the change of the phonon states due to the quadrupole order in this compound.
相似文献152.
Hajime Nakamura Tamotsu Igarashi Takayuki Tsutsui 《International Journal of Heat and Fluid Flow》2003,24(6):807-815
The flow and local heat transfer around a wall-mounted cube oriented 45° to the flow is investigated experimentally in the range of Reynolds number 4.2 × 103–3.3 × 104 based on the cube height. The distribution of local heat transfer on the cube and its base wall are examined, and it is clarified that the heat transfer distribution under the angled condition differs markedly to that for cube oriented perpendicular to the flow, particularly on the top face of the cube. The surface pressure distribution is also investigated, revealing a well-formed pair of leading-edge vortices extending from the front corner of the top face downstream along both front edges for Re>(1−2)×104. Regions of high heat transfer and low pressure are formed along the flow reattachment and separation lines caused by these vortices. In particular, near the front corner of the top face, pressure suction and heat transfer enhancement are pronounced. The average heat transfer on the top face is enhanced at Re>(1−2)×104 over that of a cube aligned perpendicular to the flow. 相似文献
153.
Cover Picture: Photoinduced Charge‐Carrier Generation in Epitaxial MOF Thin Films: High Efficiency as a Result of an Indirect Electronic Band Gap? (Angew. Chem. Int. Ed. 25/2015) 下载免费PDF全文
Dr. Jinxuan Liu Wencai Zhou Jianxi Liu Dr. Ian Howard Dr. Goran Kilibarda Dr. Sabine Schlabach Damien Coupry Dr. Matthew Addicoat Satoru Yoneda Yusuke Tsutsui Dr. Tsuneaki Sakurai Prof. Dr. Shu Seki Dr. Zhengbang Wang Peter Lindemann Dr. Engelbert Redel Prof. Thomas Heine Prof. Dr. Christof Wöll 《Angewandte Chemie (International ed. in English)》2015,54(25):7201-7201
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Satoshi Tsutsui Masami Nakada Saburo Nasu Yoshinori Haga Tetsuo Honma Etsuji Yamamoto Hitoshi Ohkuni Yoshichika Ōnuki 《Hyperfine Interactions》2000,126(1-4):335-340
We have performed 238U Mössbauer spectroscopy of uranium-based heavy fermion superconductors, UPd2Al3 and URu2Si2, in order to investigate their physical properties, mainly their magnetic properties. The slow relaxation of magnetic hyperfine interaction in a paramagnetic state and the static hyperfine field has been observed in an antiferromagnetic ordered state for each compound. The line-widths have maximum at their characteristic temperatures where their magnetic susceptibilities have maximum values. 相似文献
156.
Tadatomi Nishikubo Atsushi Kameyama Kousuke Tsutsui Masami Iyo 《Journal of polymer science. Part A, Polymer chemistry》1999,37(12):1805-1814
New photoreactive p-methylcalix[6]arene (MCA) derivatives containing cationically polymerizable groups such as propargyl ether (calixarene 1), allyl ether (calixarene 2), and ethoxy vinyl ether (calixarene 3) groups were synthesized with 80, 74, and 84% yields by the substitution reaction of MCA with propargyl bromide, allyl bromide, and 2-chloroethyl vinyl ether (CEVE), respectively, in the presence of either potassium hydroxide or sodium hydride by using tetrabutylammonium bromide (TBAB) as a phase transfer catalyst (PTC). The p-tert-butylcalix[8]arene (BCA) derivative containing ethoxy vinyl ether groups (calixarene 4) was also synthesized in 83% yield by the substitution reaction of BCA with CEVE by using sodium hydride as a base and TBAB as a PTC. The MCA derivative containing 1-propenyl ether groups (calixarene 5) was synthesized in 80% yield by the isomerization of calixarene 2, which contained allyl ether groups, by using potassium tert-buthoxide as a catalyst. The photochemical reactions of carixarene 1, 3, 4, 5, and 6 were examined with certain photoacid generators in the film state. In this reaction system, calixarene 3 containing ethoxy vinyl ether groups showed the highest photochemical reactivity when bis-[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluorophosphate) (DPSP) was used as the catalyst. On the other hand, calixarene 1 containing propargyl ether groups had the highest photochemical reactivity when 4-morpholino-2,5-dibuthoxybenzenediazonium hexafluorophosphate (MDBZ) was used as the catalyst. It was also found that the prepared carixarene derivatives containing cationically polymerizable groups such as propargyl, allyl, vinyl, and also 1-propenyl ethers have good thermal stability. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 1805–1814, 1999 相似文献
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(5S,2E)-5-Tetrahydropyranyloxy-2-hexenoic acid and p-toluenesulfonylethyl (4R,5R,7R,2E)-7-hydroxy-4,5-dimethylmethylenedioxy-2-octenoate were prepared from ethyl acetoacetate and D-glucose, respectively. 相似文献