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941.
942.
H. Bauer 《Fresenius' Journal of Analytical Chemistry》1968,234(1):51-52
Ohne Zusammenfassung 相似文献
943.
Analytical and Bioanalytical Chemistry - 相似文献
944.
945.
I. Bauer 《Fresenius' Journal of Analytical Chemistry》1966,223(1):53
Ohne Zusammenfassung 相似文献
946.
Gerd J. Zimmermann Hermann Joh Bauer 《Zeitschrift für Physik A Hadrons and Nuclei》1969,229(2):154-162
Measurements of magnetization, X-ray studies and volumetric investigations show that ferromagnetic nickel-chrome alloys (2 to 7% Cr) absorb hydrogen in high concentrations (β-phase). Caused by the interstitial hydrogen atoms NiCr looses its ferromagnetism, combined with reversibly enlarged lattice constants of some percent (decreasing with increasing Cr-content). The variation of lattice expansionΔ a with Cr-content is in some way similar to the recently found proportionality ofΔ a with the mean magnetic moment in the case of NiCu and NiCu-hydrogen-alloys but deviating in a characteristic manner. — X-ray studies also showed an additional increase ofΔ a by supersaturation of the β-phase, and the occurrance of a second phase with very low values ofΔ a. 相似文献
947.
We present an exact analysis of two conductor-insulator transitions in the random graph model where low connectivity means high impurity concentration. The adjacency matrix of the random graph is used as a hopping Hamiltonian. We compute the height of the delta peak at zero energy in its spectrum exactly and describe analytically the structure and contribution of localized eigenvectors. The system is a conductor for average connectivities between 1.421 529ellipsis and 3.154 985ellipsis but an insulator in the other regimes. We explain the spectral singularity at average connectivity e = 2.718 281ellipsis and relate it to other enumerative problems in random graph theory. 相似文献
948.
We report the results of optical studies of new heavy fermion compounds YbFe(4)Sb(12) and CeRu(4)Sb(12). We show that these compounds, as well as several other heavy fermion materials with a nonmagnetic ground state, obey a universal scaling relationship between the quasiparticle effective mass m(*) and the magnitude of the energy gap Delta in the excitation spectrum. This result is in accord with the picture of hybridization of localized f-electron and free carrier states. 相似文献
949.
Affolder T Akimoto H Akopian A Albrow MG Amaral P Amendolia SR Amidei D Anikeev K Antos J Apollinari G Arisawa T Asakawa T Ashmanskas W Azfar F Azzi-Bacchetta P Bacchetta N Bailey MW Bailey S de Barbaro P Barbaro-Galtieri A Barnes VE Barnett BA Baroiant S Barone M Bauer G Bedeschi F Belforte S Bell WH Bellettini G Bellinger J Benjamin D Bensinger J Beretvas A Berge JP Berryhill J Bevensee B Bhatti A Binkley M Bisello D Bishai M Blair RE Blocker C Bloom K Blumenfeld B Blusk SR Bocci A Bodek A 《Physical review letters》2001,86(20):4472-4478
We present the results of a search for neutral Higgs bosons produced in association with b quarks in pp-->bb(phi)-->bbb final states with 91+/-7 pb(-1) of pp collisions at sqrt[s] = 1.8 TeV recorded by the Collider Detector at Fermilab. We find no evidence of such a signal and the data are interpreted in the context of the neutral Higgs sector of the minimal supersymmetric extension of the standard model. With basic parameter choices for the supersymmetric scale and the stop-quark mixing, we derive 95% C.L. lower mass limits for neutral Higgs bosons for tan(beta) values in excess of 35. 相似文献
950.
Abbott B Abdesselam A Abolins M Abramov V Acharya BS Adams DL Adams M Alves GA Amos N Anderson EW Baarmand MM Babintsev VV Babukhadia L Bacon TC Baden A Baldin B Balm PW Banerjee S Barberis E Baringer P Bartlett JF Bassler U Bauer D Bean A Begel M Belyaev A Beri SB Bernardi G Bertram I Besson A Beuselinck R Bezzubov VA Bhat PC Bhatnagar V Bhattacharjee M Blazey G Blessing S Boehnlein A Bojko NI Borcherding F Brandt A Breedon R Briskin G Brock R Brooijmans G Bross A Buchholz D Buehler M 《Physical review letters》2001,86(17):3712-3717
We apply a quasi-model-independent strategy ("Sleuth") to search for new high p(T) physics in approximately 100 pb(-1) of pp collisions at square root of (s) = 1.8 TeV collected by the D0 experiment during 1992-1996 at the Fermilab Tevatron. We systematically analyze many exclusive final states and demonstrate sensitivity to a variety of models predicting new phenomena at the electroweak scale. No evidence of new high p(T) physics is observed. 相似文献