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  • 1
    Electronic Resource
    Electronic Resource
    Models for new particle production in nuclear collisions (1986)
    Springer
    The European physical journal 324 (1986), S. 243-259 
    Details
    ISSN: 1434-601X
    Keywords: 13.90 ; 14.80 ; 25.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Following up our earlier work and also stimulated by recent experimental results on positron production in heavy ion collisions we investigate various mechanisms for the production of a light, previously unknown particle in such collisions. As more conventional mechanisms seem to be inadequate we concentrate on processes directly or indirectly connected with the strong electric or magnetic fields and quark degrees of freedom in nuclei. We also consider modifications of the color confinement scheme. Our analysis is confined to schemes staying within the framework of the standardSU(3)c ×SU(2)×U(1) model. Since most of the possibilities discussed can be rejected, severe modifications of basic concepts of particle physics seem to be required if the production of a new particle is confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294578
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  • 2
    Electronic Resource
    Electronic Resource
    Angular correlations of electron-positron pairs produced in heavy-ion collisions (1987)
    Springer
    The European physical journal 328 (1987), S. 81-84 
    Details
    ISSN: 1434-601X
    Keywords: 25.70 ; 34.50.F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We investigate the strength of angular correlations between coincident electron-positron pairs produced in Pb + Pb collisions at 5.7 MeV/u. The angular correlations are predicted to be observable at electron energies above 200 keV, almost independent of positron energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295185
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  • 3
    Electronic Resource
    Electronic Resource
    Can multiple structures in positron spectra be caused by atomic effects? (1988)
    Springer
    The European physical journal 8 (1988), S. 305-313 
    Details
    ISSN: 1434-6079
    Keywords: 25.70 ; 34.50.F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In recent experiments at least two structures have been detected in positron spectra from subcritical (total chargeZ ≦ 174) heavy-ion collisions at bombarding energiesE Lab=5.7−5.9 MeV/n. The origin of these structures is unexplained up to now. Atomic effects have already been discussed as a possible source in a previous paper, where a schematic ansatz for the electronic transition matrix elements was employed. Meanwhile numerical calculations forK-vacancy formation also exhibited oscillations in the impact parameter dependence when using this ansatz. In this paper we report on a scaling law describing these oscillations. As a consequence certain subsidiary conditions have to be imposed on our schematic ansatz, which in turn yield a new understanding on eligible atomic sources for multiple structures in the emission spectra of positrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437096
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  • 4
    Electronic Resource
    Electronic Resource
    MO-radiation interference phenomena as a “clock” for nuclear reaction times (1986)
    Springer
    The European physical journal 1 (1986), S. 47-50 
    Details
    ISSN: 1434-6079
    Keywords: 34.50 ; 25.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Molecular orbitalK x-rays emitted during Pb+Pb collisions are investigated. Two results are presented: A slight filling up of the minimum observed in the differential radiation cross-section is given by radiative transitions from theM-shell to theL-shell. The minima are shifted with increasing nuclear contact times to higher photon energies. The observation of the shift allows the estimation of the sticking time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01384657
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Struktur des Chromtetrafluorids (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1969-1972 
    Details
    ISSN: 0044-2313
    Keywords: Chromium tetrafluoride ; single crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Structure of Chromium TetrafluorideBy direct fluorination of elemental chromium with a HF/F2-mixture under solvothermal conditions CrF4 has been obtained for the first time in form of single crystal suitable for x-ray investigations. The violet till amethyst coloured CrF4 crystallizes tetragonal, space group P42/mnm-D4h14 (Nr. 136), a = 829.6(1) pm, c = 373.7(1) pm, Z = 4 and is closely related to the NbOCl3-type of structure [1].
    Notes: Durch Druckfluorierung von elementarem Chrom mit einem HF/F2-Gemisch unter Solvothermalbedingungen gelang es erstmals, CrF4 in Form zur Strukturbestimmung geeigneter Einkristalle darzustellen. Das violette bis amethystfarbene, häufig nadelförmige Chromtetrafluorid kristallisiert tetragonal in der Raumgruppe P42/mnm-D4h14 (Nr. 136) mit a = 829,6(1) pm, c = 373,7(1) pm, Z = 4 und ist vom Aufbau her dem NbOCl3-Typ eng verwandt [1].
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956211123
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Kristallstruktur von O2+MF6- (M = Sb, Ru, Pt, Au) (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1076-1082 
    Details
    ISSN: 0044-2313
    Keywords: Dioxygenyl compounds ; single crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Crystal Structure of O2+MF6- (M = Sb, Ru, Pt, Au)O2+MF6- (M = Sb, Ru, Pt, Au) were obtained again, but for the first time investigated by X-ray methods. Colourless O2+SbF6- and the rubyred compounds O2+RuF6- and O2+PtF6- crystallize isostructural in space group Ia3-Th7 (Nr. 206) with a = 1016(1) pm (Sb), a = 1002.6(9) pm (Ru) and a = 1003.6(9) pm (Pt), Z = 8. Yellow O2+AuF6- crystallizes trigonal-rhombohedric in space group R3-D326 (Nr. 148) with a = 775.9(3) pm, c = 711.7(4) pm, Z = 3.
    Notes: Erneut dargestellt, aber erstmals anhand von Einkristallen röntgenographisch untersucht wurden die Fluoride O2+MF6- (M = Sb, Ru, Pt, Au). Farbloses O2+ und die rubinroten Verbindungen O2+RuF6- und O2+PtF6- kristallisieren isotyp in der Raumgruppe Ia3-Th7 (Nr. 206) mit a = 1016(1) pm (Sb), a = 1002,6(9) pm (Ru) und a = 1003,6(9) pm (Pt), Z = 8. Gelbes O2+AuF6- kristallisiert trigonal-rhomboedrisch in der Raumgruppe R3-D326 (Nr. 148) mit a = 775,9(3) pm, c = 711,7(4) pm, Z = 3.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220623
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  • 7
    Electronic Resource
    Electronic Resource
    Neue Fluoropalladate(II) M2[PdF4] (M = Na, K) sowie K2RbPdF5Professor Hanskarl Müller-Buschbaum zum 60. Geburtstag (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 597 (1991), S. 9-18 
    Details
    ISSN: 0044-2313
    Keywords: Alkali fluoro palladate(II) ; preparation ; single crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Fluoropalladates(II) M2[PdF4] (M = Na, K) and K2RbPdF5For the first time bright yellow single crystals M2[PdF4] (M = Na, K) have been obtained and their structure determined. K2[PdF4] crystallizes monoclinic, space group C2/m-C2h3 (No. 12) with a = 975.2(3) pm, b = 597.6(1) pm, c = 420.2(1) pm, β = 92.17(2)° and Z = 2. Structure related Na2[PdF4] crystallizes monoclinic too, but in space group P21/c-C2h5 (No. 14) with a = 340.88(7) pm, b = 561.1(1) pm, c = 999.2(2) pm, β = 93.97(2)° and Z = 2. K2RbPdF5, yellow, crystallizes tetragonal with a = 724.9(1) pm, c = 627.9(1) pm, Z = 2 and is isotypic with Rb2CsPdF5 (space group P4/mbm-D4h5, No. 127), an ordered structure variant of the Rb3PdF5-type [1].
    Notes: Erstmals konnten leuchtend gelbe Einkristalle M2[PdF4] (M = Na, K) dargestellt und ihre Struktur bestimmt werden. K2[PdF4] kristallisiert monoklin, R.G. C2/m-C32h (Nr. 12) mit a = 975,2(3) pm, b = 597,6(1) pm, c = 420,2(1) pm, β = 92,17(2)° und Z = 2. Strukturverwandtes Na2[PdF4] kristallisiert ebenfalls monoklin, jedoch in der R.G. P21/c-C2h5 (Nr. 14) mit a = 340,88(7) pm, b = 561,1(1) pm, c = 999,2(2) pm, β = 93,97(2)°und Z = 2. K2RbPdF5, gelb, kristallisiert tetragonal mit a = 724,9(1) pm, c = 627,9(1) pm, Z = 2 und ist isotyp zu Rb2CsPdF5 (R.G. P4/mbm-D4h5, Nr. 127), einer geordneten Strukturvarianten des Rb3PdF5-Typs [1].
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915970103
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  • 8
    Electronic Resource
    Electronic Resource
    Fluoroplatinate(IV) der Lanthaniden LnF[PtF6]. (Ln = Pr, Sm, Gd, Tb, Dy, Ho, Er) (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1431-1440 
    Details
    ISSN: 0044-2313
    Keywords: Fluoroplatinates(IV) ; preparation ; single crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluoroplatinates(IV) of the Lanthanides LnF[PtF6] (Ln = Pr, Sm, Gd, Tb, Dy, Ho, Er)For the first time fluorides LnF[PtF6] (Ln = Pr, Sm, Gd, Tb, Dy, Ho, Er), all yellow have been obtained. From single crystal data they crystallize monoclinic, space group P21/n-C2h5 (No. 14), Z = 4, Pr: a = 1 125.77(19) pm, b = 559.04(7) pm, c = 910.27(17) pm, β = 107.29(1)°; Sm: a = 1 114.63(31) pm, b = 552.70(12) pm, c = 898.02(20) pm, β = 107.24(2)°; Gd: a = 1 112.12(15) pm, b = 551.22(7) pm, c = 891.99(11) pm, β = 107.09(1)°; Tb (Powder data): a = 1 108.88(20) pm, b = 552.71(9) pm, c = 889.56(16) pm, β = 107.30(1)°; Dy: a = 1 100.28(23) pm, b = 547.77(8) pm, c = 882.41(13) pm, β = 107.32(1); Ho: a = 1 099.11(16) pm, b = 546.16(7) pm, c = 879.45(15) pm, β = 107.34(1)°; Er: a = 1 095.10(16) pm, b = 544.82(10) pm, c = 874.85(14) pm, β = 107.37(1)°.
    Notes: Erstmals dargestellt wurden Fluoride LnF[PtF6] (Ln = Pr, Sm, Gd, Tb, Dy, Ho, Er), alle gelb. Nach Einkristalluntersuchungen kristallisieren diese monoklin in der Raumgruppe P21/n-C2h5 (Nr. 14), Z = 4, Pr: a = 1 125,77(19) pm, b = 559,04(7) pm, c = 910,27(17) pm, β = 107,29(1)°; Sm: a = 1 114,63(31) pm, b = 552,70(12) pm, c = 898,02(20) pm, β = 107,24(2)°; Gd: a = 1 112,12(15) pm, b = 551,22(7) pm, c = 891,99(11) pm, β = 107,09(1)°; Tb (Pulverdaten): a = 1 108,88(20) pm, b = 552,71(9) pm, c = 889,56(16) pm, β = 107,30(1)°; Dy: 1 100,28(23) pm, b = 547,77(8) pm, c = 882,41(13) pm, β = 107,32(1)°; Ho: a = 1 099,11(16) pm, b = 546,16(7) pm, c = 879,45(15) pm, β = 107,34(1)°; Er: a = 1 095,10(16) pm, b = 544,82(10) pm, c = 874,85(14) pm, β = 107,37(1)°. Im Gegensatz zu älteren Befunden liegt die Raumgruppe P21/n-C2h5 (Nr. 14) mit einem verdoppelten Zellvolumen vor.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190819
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  • 9
    Electronic Resource
    Electronic Resource
    Über Komplexe Fluoride des zweiwertigen PalladiumsProfessor Rudolf Hoppe zum 70. Geburtstage gewidmet (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 616 (1992), S. 7-13 
    Details
    ISSN: 0044-2313
    Keywords: Alkali fluoro palladates(II) ; preparation ; single crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Complex Fluorides of Divalent PalladiumFor the first time single crystals of the new compounds RbPdPdF5, KPdPdF5, and K2CsPdF5 have been obtained. Orange brown RbPdPdF5 crystallizes orthorhombic, space group Imma-D2h28 (No. 74) with a = 633.6(1) pm, b = 765.5.(1) pm, c = 1067.5(1) pm and Z = 4 and is isotypic with CsPdPdF5 [1]. Structure related KPdPdF5 (also orange brown) crystallizes orthorhombic too, but in space group Pnma-D2h16 (No. 62) with a 614.12(9) pm, b = 748.7(1) pm, c = 1065.0(2) pm and Z = 4. K2CsPdF5, light yellow, crystallizes tetragonal with a = 736.3(1) pm, c = 628.0(1) pm, Z = 2, and is isotypic with Rb2CsPdF5 (space group P4/mbm—D4h5 Nr. 127), an ordered structure variant of the Rb3PdF5-Type [1].
    Notes: Neu dargestellt wurden RbPdPdF5, KPdPdF5 und K2CsPdF5, alle in Form von Einkristallen. Orangebraunes RbPdPdF5 kristallisiert orthorhombisch, R. G. Imma-D2h28 (Nr. 74) mit a = 633,6(1) pm, b = 765,5(1) pm, c = 1067,5(1) pm und Z = 4 und ist isotyp zu CsPdPdF5 [1]. Strukturverwandtes KPdPdF5 (ebenfalls orange-braun) kristallisiert gleichfalls orthorhombisch, jedoch in der R. G. Pma—D2h16 (Nr. 62) mit a = 614,12(9) pm, b = 748,7(1) pm, c = 1065,0(2) pm und Z = 4. K2CsPdF5, hellgelb, kristallisiert tetragonal mit a = 736,3(1) pm, c = 628,0(1) pm Z = 2, ist isotyp zu Rb2CsPdF5 (R. G. P4/mbm—D4h5) (Nr. 127) und somit ein weiterer Vertreter der geordneten Strukturvariante des Rb3PdF5-Typs [1].
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926161002
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Synthese und Kristallstruktur von LiPdAlF6 und PdZrF6 (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 189-192 
    Details
    ISSN: 0044-2313
    Keywords: Fluoropalladates(II) ; preparation ; single crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of LiPdAlF6 and PdZrF6.For the first time single crystals of the new compounds LiPdAlF6 and PdZrF6 have been obtained. LiPdAlF6 (blue) crystallizes trigonal, space group P31c - D3d2 (No. 163; LiCaAlF6-type [2]), in an ordered structure variant of the Li2[ZrF6]-structure [3], with a=497.21(9) pm, c=914.0(9) pm and Z=2. PdZrF6 (also blue) is isotypic with LiSbF6 [4] and crystallizes trigonal-rhomboedric with a=552,3(1) pm, c=1 447,5(4) pm, space group R 3 - C3i2 (No. 148) and Z=3.
    Notes: Neu dargestellt wurden LiPdAlF6 und PdZrF6, beide in Form von Einkristallen. Blaues LiPdAlF6 kristallisiert trigonal im LiCaAlF6-Typ [2], einer Ordnungsvariante der Li2[ZrF6]-Struktur [3], in der Raumgruppe P31c - D3d2 (Nr. 163) mit a=497,21(9) pm, c=914,0(9) pm und Z=2. PdZrF6 (hellblau) kristallisiert trigonal-rhomboedrisch in der Raumgruppe R 3 - C3i2(Nr. 148) mit a=552,3(1) pm, c=1 447,5(4) pm und Z=3 (isotyp zu LiSbF6 [4]).
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190131
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