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121.
S. Momota M. Mihara D. Nishimura M. Fukuda Y. Kamisho M. Wakabayashi K. Matsuta S. Suzuki M. Nagashima Shengyun Zhu Daqing Yuan Yongnan Zheng Zuo Yi Ping Fan T. Izumikawa A. Kitagawa S. Sato M. Kanazawa M. Torikoshi T. Minamisono Y. Nakamura K. Tashiro A. Honma N. Yoshida H. Shirai T. Ohtsubo T. Nagatomo H. Uenishi K. Iwamoto M. Yaguchi T. Ogura T. Ito K. Yamamura Y. Ichikawa Y. Nojiri J. R. Alonso T. J. M. Symons 《Hyperfine Interactions》2013,218(1-3):53-58
Hyperfine interactions were studied in the intermetallic compound GdRh2Si2 by perturbed angular correlation (PAC) technique using 181Hf(181Ta) probe nuclei. The measurements were performed in the temperature range 15–285 K. The PAC spectra above the antiferromagnetic ordering temperature of the GdRh2Si2 compound (T N ~ 106 K), were analyzed using a model that included only electric quadrupole interactions. The observed major fraction was assigned to the 181Hf(181Ta) probe substituting the Gd atoms. The PAC spectra below Néel temperature were analyzed using combined electric quadrupole and magnetic dipole interactions. The Bhf value at Gd, measured at 15 K was found to be 1.4(1) T which, is smaller, when compared with the values obtained in this compound using other nuclear probes, 155Gd (Bhf ~ 30 T) and 140Ce (Bhf ~ 26 T). The present result using 181Hf(181Ta) probe is quite interesting since it shows that the contribution to Bhf at Gd due the host is smaller than other components which contribute to the hyperfine field. The temperature dependence of Bhf shows an anomalous behavior. 相似文献
122.
Shuntaro Mataka Kazufumi Takahashi Yukihiro Yamada Masashi Tashiro 《Journal of heterocyclic chemistry》1979,16(5):1009-1015
The reaction of sulfur nitride (1) with acetylenes (2a-m) was carried out in refluxing toluene to give 1,2,5-thiadiazoles (3a-m) as a major product. 相似文献
123.
Nojiri Y. Ishiga K. Onishi T. Sasaki M. Ohsumi F. Kawa T. Mihara M. Fukuda M. Matsuta K. Minamisono T. 《Hyperfine Interactions》1999,120(1-8):415-418
Hyperfine interactions of 8Li impurity nucleus imbedded in ferromagnetic Ni metal were studied using the β-NMR technique. Two kinds of hyperfine fields
B82 were found, corresponding to two different final sites of Li atoms in the Ni lattice. The nuclear spin-lattice relaxation
times T1 of 8Li in Ni were also determined for each field. Temperature dependencies of B82 and T1 were observed to deduce these values at T=0 K that can be compared with those calculated recently by Akai et al.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
124.
T. Nagatomo T. Sumikama M. Ogura K. Matsuta Y. Nakashima K. Akutsu T. Iwakoshi H. Fujiwara T. Minamisono M. Fukuda M. Mihara K. Minamisono T. Miyake S. Momota Y. Nojiri A. Kitagawa M. Sasaki M. Torikoshi M. Kanazawa M. Suda M. Hirai S. Sato S. Y. Zhu J. Z. Zhu Y. J. Xu Y. N. Zheng J. R. Alonso G. F. Krebs T. M. Symons 《Hyperfine Interactions》2004,159(1-4):269-272
The electric quadrupole coupling constants eqQ/h of 8B (, T
1/2 = 769 ms) and 13B (, T
1/2 = 17.4 ms) in single crystal TiO2 have been precisely measured by the β-NQR technique. The ratios of these Q moments to Q(12B) were determined as ∣Q(8B)/Q(12B)∣ = 4.882(32) and ∣Q(13B)/Q(12B)∣ = 2.768(24). 相似文献
125.
Feruloyl,caffeoyl, and flavonol glucosides from <Emphasis Type="Italic">Equisetum hyemale</Emphasis>
Feruloyl, caffeoyl, and flavonol glucosides were isolated from the stems of Equisetum hyemale L. The structures of the compounds were elucidated as trans-feruloyl-4-β-glucoside (1), cis-feruloyl-4-β-glucoside (2), trans-caffeoyl-3-β-glucoside (3), kaempferol-3-sophoroside (4), kaempferol-3-sophoroside-7-β-glucoside (5), and herbacetin-3-sophoroside-8-β-glucoside (6) based on the spectral evidence. 相似文献
126.
127.
Emisson spectra and time-resolved two-dimensional (2D) emission images of the electron-ion dielectronic recombination (i.e. a reversal process of auto-ionization) line of neutral Cu atoms, the selectively excited Cu ionic line, and normal Cu atomic line were observed for understanding the excitation mechanisms of Cu neutral and ionic lines in a low-pressure laser-induced plasma (LP-LIP) of Ar. From the observations, the number of charged particles around the emitting species seems to increase with increasing Ar pressure. Different time-resolved 2D emission images were observed among the selectively excited Cu ionic line and other Cu emission lines resulting from the different excitation mechanisms of the respective emission lines. Collisions of the second kind and electron-ion recombinations were found to be one of the major excitation mechanisms of Cu in Ar LP-LIP. 相似文献
128.
A novel emission excitation source comprising a high repetition rate diode-pumped Q-switched Nd:YAG laser and a Grimm-style glow-discharge lamp is described. Laser-ablated atoms are introduced into the He glow discharge plasma, which then give emission signals. By using phase-sensitive detection with a lock-in amplifier, the emission signal modulated by the pulsed laser can be detected selectively. It is possible to estimate only the emission intensity of sample atoms ablated by laser irradiation with little interference from the other species in the plasma. 相似文献
129.
130.
Masaoki Oku Toetsu ShishidoHideyuki Matsuta Kazuaki Wagatsuma 《Journal of Electron Spectroscopy and Related Phenomena》2006
The background corrected valence band XPS spectra and the electronic structures of FeAl, FeSi, CoAl and CoSi were studied. Clean surfaces of the polycrystalline samples were obtained by in situ fracturing of the samples in an XPS spectrometer. The energy loss parts of the Fe 2p, Co 2p and valence band spectra were removed by the deconvolution method using Al 2s or Si 2s spectra as response functions. CoAl exhibited a satellite peak in the Co 2p region, but the other compounds had no clear satellite peaks in the Co 2p and Fe 2p regions. The experimentally background corrected valence band spectra were compared with the calculated spectra using the first-principle band calculation. There were large discrepancies between the spectra above the binding energy of 5 eV. These indicated that the experimental spectra could not be explained by the electronic structures of the ground states alone. 相似文献