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321.
Kayo Masuda 《Transactions of the American Mathematical Society》2004,356(9):3545-3556
Let be a reductive, non-abelian, algebraic group defined over . We investigate algebraic -actions on the total spaces of non-trivial algebraic -vector bundles over -modules with great interest in the case that is a dihedral group. We construct a map classifying such actions of a dihedral group in some cases and describe the spaces of those non-linearizable actions in some examples.
322.
K. Morita K. Morimoto D. Kaji H. Haba E. Ideguchi R. Kanungo K. Katori H. Koura H. Kudo T. Ohnishi A. Ozawa T. Suda K. Sueki I. Tanihata H. Xu A. V. Yeremin A. Yoneda A. Yoshida Y.-L. Zhao T. Zheng 《The European Physical Journal A - Hadrons and Nuclei》2004,21(2):257-263
Production and decay of the isotope 271Ds were studied. The isotope was produced by 208Pb + 64Ni
271Ds + n reaction. Fourteen
-decay chains have been assigned to decays originating from the isotope 271Ds. An excitation function of the production of this isotope was measured. The results have provided a good confirmation of production and decay of 271Ds reported by Hofmann et al. The presence of an isomeric state in 271Ds has been confirmed. The existence of a possible isomeric state in 267Hs is presented.Received: 22 September 2003, Revised: 26 December 2002, Published online: 10 August 2004PACS:
23.60. + e
decay - 25.70.-z Low and intermediate energy heavy-ion reactions - 27.90. + b
D. Kaji: Present address: Center for Nuclear Science, University of Tokyo, Wako-shi, Saitama 351-0198, Japan.A. Ozawa: Present address: University of Tsukuba, Tsukuba, Ibaragi 3058 577, Japan. 相似文献
323.
T. Nagatomo K. Matsuta Y. Nakashima T. Sumikama M. Ogura K. Akutsu T. Iwakoshi H. Fujiwara T. Minamisono M. Fukuda M. Mihara T. Miyake K. Minamisono 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):273-276
The momentum dependences of the nuclear spin polarization P and alignment A of 13B(, T
1/2 = 17.36 ms) produced in the 100A MeV 15N + Be collisions have been measured by detecting β-ray asymmetry. Because both the P and A were significantly smaller than the prediction from a simple kinematical model, some relaxation mechanisms must be take into
account. Comparing the signs of the observed alignment of 12B, the sign of the quadrupole coupling constant eqQ of 13B in TiO2 was determined to be positive. 相似文献
324.
Koketsu M Mizutani K Ogawa T Takahashi A Ishihara H 《The Journal of organic chemistry》2004,69(25):8938-8941
The reaction of lithium alkyneselenolate with alpha,beta-unsaturated ketone and then alkyl or acyl halide afforded 3-acyl-1-alkyl-2-alkylseleno-1-cyclobutene. The structure of the cyclobutene was elucidated by IR, MS, (1)H, (13)C, and (77)Se NMR, COSY, HMQC, and HMBC data and X-ray analysis. 相似文献
325.
[reaction: see text] 1,2-Cyclic sulfamidates undergo regiospecific nucleophilic displacement with either methyl thioglycolate or alpha-amino esters, followed by lactamization (thermal, base-mediated, or cyanide-catalyzed), to give thiomorpholin-3-ones and piperazin-2-ones. 相似文献
326.
Tokuhiro Watanabe Ikuko Ueda Naomi Hayakawa Yasuo Kondo Hiroko Adachi Akiko Iwasaki Shizuko Kawamata Fumiko Mentori Miyuki Ichikawa Kayo Yuasa Akihiro Ohta Teruo Kurihara Hiroshi Miyamae 《Journal of heterocyclic chemistry》1990,27(3):711-716
2,3-Dichloro- and 2,5-dichloropyrazines were treated with sodium azide. The former gave diazidopyrazines and the latter, monoazidomonochloropyrazines. Pyrolysis of 2,3-diazidopyrazines resulted the production of 1,2-dicyanoiminoethanes and that of 2-azido-5-chloropyrazines, chloroimidazoles. 相似文献
327.
328.
329.
R. Brandelik W. Braunschweig H. -U. Martyn H. G. Sander D. Schmitz W. Sturm W. Wallraff D. Cords R. Felst R. Fries E. Gadermann H. Hultschig P. Joos W. Koch U. Kötz H. Krehbiel D. Kreinick H. L. Lynch W. A. McNeely G. Mikenberg K. C. Moffeit D. Notz M. Schliwa A. Shapira B. H. Wiik G. Wolf J. Ludwig K. H. Mess A. Petersen G. Poelz J. Ringel O. Römer R. Rüsch K. Sauerberg P. Schmüser W. de Boer G. Buschhorn W. Fues Ch. von Gagern G. Grindhammer B. Gunderson R. Kotthaus H. Lierl H. Oberlack S. Orito T. Suda Y. Totsuka S. Yamada DASP Collaboration 《Zeitschrift fur Physik C Particles and Fields》1979,1(3):233-256
This paper summarizes the measurements one + e ? annihilation performed by the DASP Collaboration in the energy range between 3.1 and 5.2 GeV. The following topics are covered: total cross section, production and two body decays of the narrow resonances, radiative decays of theJ/ψ and ψ′ resonances and evidence for theX(2.82), ψ′ cascade decays, inclusive η production and evidence for theF meson, semileptonic decays of charmed mesons and properties of the heavy lepton. 相似文献
330.