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  • 1
    Electronic Resource
    Electronic Resource
    New neutron-rich isotopes in the scandium-to-nickel region, produced by fragmentation of a 500 MeV/u86Kr beam (1992)
    Springer
    The European physical journal 343 (1992), S. 67-71 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Np ; 27.50. + e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have measured production cross-sections of the new neutron-rich isotopes58Ti,61V,63Cr,66Mn,69Fe,71Co and neighbouring isotopes that have been identified as projectile fragments from reactions between a 500 MeV/u86Kr beam and a beryllium target. The isotope identification was performed with the zero-degree magnetic spectrometer FRS at GSI, using in addition time-of-flight and energy-loss measurements. The experimental production cross-sections for the new nuclides and neighbouring isotopes are compared with an empirical parametrization. The resulting prospects for reaching even more neutron-rich isotopes, such as the doubly-magic nuclide78Ni, are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291599
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  • 2
    Electronic Resource
    Electronic Resource
    β-Delayed neutron emission of15B,18C,19,20N,34,35Al and39P (1988)
    Springer
    The European physical journal 330 (1988), S. 63-68 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Np ; 23.40.-s ; 27.30.+ t
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The isotopes15B,18C,19,20N,34,35Al and39P have been produced as projectile-like fragments from the interaction of a86Kr beam of 45 MeV/u from GANIL with a181Ta target. Separated by the 0° magnetic analyser LISE, the nuclei are identified by means of aΔE- E semiconductor telescope. It is surrounded, in a geometry close to 4π, by a thin plastic scintillator (NE 102) and a large volume liquid scintillator (NE 213) for the detection of betas and neutrons, respectively, from the decay of the implanted nuclei. By observation of theβ-delayed neutrons, the half-livesT 1/2 and neutron emission probabilitiesP n have been measured. TheT 1/2 of18C,20N,35Al,39P and Pn of18C,19,20N,34,35Al and39P are determined for the first time. For the isotopes17C,36,37Si and38P upper limits of Pn are deduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01287265
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  • 3
    Electronic Resource
    Electronic Resource
    Direct observation of new proton rich nuclei in the region 23≦Z≦29 using A 55A.MeV58Ni beam (1987)
    Springer
    The European physical journal 327 (1987), S. 17-24 
    Details
    ISSN: 1434-601X
    Keywords: 21.10-k ; 25.70.Np ; 27.40+z
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using magnetic separation and identification through time of flight andΔExE measurements, the nuclei56Cu,52Co (T z =−1);55Cu,51Co,47Mn,43V(T z =−3/2)52Ni,50Co,48Fe,46Mn,44Cr (T z =−2); and51Ni (T z =−5/2) are observed for the first time from interactions of 55A.MeV58Ni projectiles with a Ni target. The predicted proton drip-line has probably been reached for the odd elements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295244
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  • 4
    Electronic Resource
    Electronic Resource
    Total cross sections of reactions induced by neutron-rich light nuclei (1989)
    Springer
    The European physical journal 332 (1989), S. 457-465 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.-k ; 07.75.+h ; 21.10.Gv ; 25.70.Np ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Total nuclear reaction cross-sections are determined by means of a 4π-γ method. The results cover a wide span of targets for various stable beams. The validity of the method is shown in a combined systematics including also the results of transmission-type experiments. The data are very well described by the formula developed by Kox et al. The same method is applied to secondary fragment beams produced from a 44 MeV/u22Ne beam on a 332mg/cm2 181Ta target. Using the LISE spectrometer the fragments4, 6He,6–9, 11Li,7, 9–12, 14Be,10–15, 17B11–19C,13–19N,15–21O,18– 21F and20,21 Ne are analyzed and transported to interact with a 199.4 mg/cm2 Cu target surrounded by a 4π-γ counter. The measured total reaction cross-sectionsσ R are discussed in terms of the reduced strong absorption radiusr 0 and compared with other experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292431
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  • 5
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur des Natriumoxohydroxoaluminathydrates Na2[Al2O3(OH)2] · 1,5 H2O (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 679-684 
    Details
    ISSN: 0044-2313
    Keywords: Sodium oxohydroxoaluminate hydrate ; Na2[Al2O3(OH)2] · 1.5 H2O ; crystal structure ; 27Al NMR ; 23Na NMR ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of the Sodium Oxohydroxoaluminate Hydrate Na2[Al2O3(OH)2] · 1.5 H2OThe crystal structure of the sodium oxohydroxoaluminate hydrate Na2[Al2O3(OH)2] ·s 1.5 H2O (up to now described as Na2O · Al2O3 · 2.5 H2O and Na2O · Al2O3 · 3 H2O, respectively) was solved. The X-ray single crystal diffraction analysis (tetragonal, space group P-421m, a = 10.522(1) Å, c = 5.330(1) Å, Z = 4) results in a polymeric layered structure, consisting of AlO3/2(OH) tetrahedral groups. Between these layers the Na+ ions are situated, which form tetrameric groups of face-linked NaO6 octahedra. The involved O2- ions are due to Al—O—Al bridges, Al—OH groups and water of crystallization. 27Al and 23Na MAS NMR investigations confirm the crystal structure analysis. The relations between the crystallization behaviour of the compound and the constitution of the aluminate anions in the corresponding sodium aluminate solution and in the solid, respectively, are discussed.
    Notes: Die Kristallstruktur des Natriumoxohydroxoaluminathydrates Na2[Al2O3(OH)2] · 1,5 H2O - bisher in der Literatur als Na2O · Al2O3 · 2,5 H2O bzw. Na2O · Al2O3 · 3 H2O bezeichnet - wird bestimmt. Die Einkristallröntgenstrukturanalyse (tetragonal, Raumgruppe P-421m, a = 10,522(1) Å, c = 5,330(1) Å, Z = 4) ergibt eine aus AlO3/2(OH)-Tetraedern aufgebaute, polymere Schichtstruktur. Die zwischen den Schichten angeordneten Na+-Ionen bilden mit O2--Ionen von Al—O—Al-Brücken, Al—OH-Gruppen und von Kristallwasser NaO6-Oktaeder, die über gemeinsame Flächen zu tetrameren Baugruppen verknüpft sind. 27Al- und 23Na-MAS-NMR-Messungen bestätigen die Kristallstrukturanalyse. Die Beziehungen zwischen dem Kristallisationsverhalten der Verbindung und der Konstitution der Aluminatanionen in der entsprechenden Natriumaluminatlösung bzw. in der kristallinen Verbindung werden diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210430
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  • 6
    Electronic Resource
    Electronic Resource
    Über kristalline Natriumhydroxogallate (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1483-1488 
    Details
    ISSN: 0044-2313
    Keywords: Nonasodium bis(hexahydroxogallate) trihydroxide hexahydrate ; decasodium bis(hexahydroxogallate) tetrahydroxide ; disodium tetrahydroxogallate chloride ; crystal structure ; 71Ga MAS NMR ; 23Na MAS NMR ; DTA, DTG, guinier lenné technique ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About Crystalline Sodium HydroxogallatesTwo crystalline sodium hydroxogallates 4,5 Na2O · Ga2O3 · 13,5 H2O (I) and 5 Na2O · Ga2O3 · 8 H2O (II), as well as a crystalline phase of the composition Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) are described.
    Notes: Es werden zwei kristalline Natriumhydroxogallate 4,5 Na2O · Ga2O3 · 13,5 H2O (I) und 5 Na2O · Ga2O3 · 8 H2O (II) sowie eine kristalline Phase der Zusammensetzung Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) beschrieben.(I) kristallisiert aus Natriumgallatlösungen eines breiten Konzentrationsfeldes und hat nach Einkristallröntgenstrukturanalyse [1] eine dreidimensional vernetzte Struktur aus monomeren [Ga(OH)6]3--Anionen, die über NaO6-Koordinationspolyeder untereinander verbunden sind; daneben sind Kristallwasser und weitere Hydroxidionen enthalten.Damit ist (I) als Nonanatrium-bis(hexahydroxogallat)-trihydroxid-hexahydrat (Na9[Ga(OH)6]2(OH)3 · 6 H2O) zu formulieren; Isotypie besteht zu dem entsprechenden Natriumhydroxoaluminat [2, 3]. 5 Na2O · Ga2O3 · 8 H2O II) läßt sich aus (I) in Gegenwart von Natriumhydroxid durch Entwässern über P4O10 bei Raumtemperatur unter Schutzgas (N2) erhalten. Es kristallisiert tetragonal, ist isotyp mit Na10[Al(OH)6]2(OH)4 [4] und dementsprechend als Na10[Ga(OH)6]2(OH)4 zu formulieren. Durch Zusatz von Natriumchlorid zu Natriumgallatlösungen läßt sich Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) isolieren, das ebenfalls tetragonal und isotyp zu Na2[Al(OH)4]Cl [5] ist. Es handelt sich demnach um das Dinatriumtetrahydroxogallatchlorid Na2[Ga(OH)4]Cl. Die Ergebnisse der 71Ga- und 23Na-MASNMR-Messungen an den Verbindungen (I) bis (III) und deren thermisches Verhalten werden diskutiert.(I) crystallizes from sodium gallate solutions in a wide concentration field; from the X-ray single crystal diffraction analysis [1] results a three dimensional network structure, consisting of monomeric [Ga(OH)6]3- anions connected by NaO6 octahedra groups. Furthermore the structure contains water of crystallization and further hydroxide ions. (I) has to be formulated as nonasodium bis(hexahydroxogallate) trihydroxide hexahydrate Na9[Ga(OH)6]2(OH)3 · 6 H2O; it is isotypic with the corresponding sodium hydroxoaluminate [2, 3]. 5 Na2O · Ga2O3 · 8 H2O (II) was obtained from (I) in presence of sodium hydroxide by dehydration over P4O10 in an inert atmosphere (N2) at room temperature. (II) crystallizes tetragonally and is isotypic with Na10[Al(OH)6]2(OH)4 [4]. Accordingly it could be described as a decasodium bis(hexahydroxogallate) tetrahydroxide, Na10[Ga(OH)6]2(OH)4. Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) was obtained by addition of sodium chloride to sodium gallate solutions, (III) crystallizes also tetragonally and is isotypic with (Na2[Al(OH)4]Cl [5]. Correspondingly, it has to be formulated as disodium tetrahydroxogallate chloride Na2[Ga(OH)4]Cl. The results of 71Ga and 23Na MAS NMR investigations of the compounds (I) to (III) and their thermal behaviour are discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230925
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Kenntnis des Natrium-tetrahydroxoaluminat-chlorids Na2[Al(OH)4]Cl (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 771-776 
    Details
    ISSN: 0044-2313
    Keywords: Tetrahydroxoaluminate chloride, Na2[Al(OH)4]Cl ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Sodium Tetrahydroxoaluminate Chloride Na2[Al(OH)4]ClThe hitherto unknown compound Na2[Al(OH)4]Cl was prepared by crystallisation from a NaCl containing sodium aluminate solution. According to the X-ray single crystal investigation (tetragonal, space group P4/nmm, a = 7.541 Å, c = 5.059 Å, Z = 2) the compound represents the first example of a crystalline hydroxoaluminate with monomeric [Al(OH)4]- anions. Cl- shows a quadratic anti prismatic coordination to 4 Na+ and over hydrogen bonds to 4 O2- while Na+ is octahedrally coordinated by 4 O2- and 2 Cl- (axial). The results of the crystal structure analysis are confirmed by 27Al and 23Na MAS NMR investigations. Na2[Al(OH)4]Cl decomposes at about 200°C without intermediates under formation of β-NaAlO2 and NaCl.
    Notes: Die bisher unbekannte Verbindung Na2[Al(OH)4]Cl wurde durch Kristallisation aus mit NaCl versetzter Natriumaluminatlösung erhalten. Entsprechend der Röntgenstrukturanalyse an einem Einkristall (tetragonal, Raumgruppe P4/nmm, a = 7,541 Å, c = 5,059 Å, Z = 2) liegt mit dieser Verbindung erstmals ein Beispiel für ein kristallines Hydroxoaluminat mit monomeren [Al(OH)4]--Anionen vor. Cl- ist quadratisch antiprismatisch mit 4 Na+ sowie über Wasserstoffbrückenbindungen mit 4 O2- koordiniert, während Na+ oktaedrisch von 4 O2- und 2 Cl- (axial) umgeben ist. Die Ergebnisse der Kristallstrukturanalyse werden durch 27Al- und 23Na-MAS-NMR-Messungen bestätigt. Na2[Al(OH)4]Cl zersetzt sich ohne Zwischenprodukte bei 200°C zu β-NaAlO2 und NaCl.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200432
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  • 8
    Electronic Resource
    Electronic Resource
    Nonanatrium-bis(hexahydroxoaluminat)-trihydroxid-hexahydrat (Na9[Al(OH)6]2(OH)3 · 6H2O) - Kristallstruktur, NMR-Spektroskopie und thermisches Verhalten (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1799-1805 
    Details
    ISSN: 0044-2313
    Keywords: Nonasodium bis(hexahydroxoaluminate) trihydroxide hexahydrate ; Na9[Al(OH)6]2(OH)3 · 6H2O ; crystal structure ; 27Al NMR ; 23Na NMR ; DSC ; DTG ; hydrogen bond ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nonasodium Bis(hexahydroxoaluminate) Trihydroxide Hexahydrate (Na9[Al(OH)6]2(OH)3 · 6H2O) - Crystal Structure, NMR Spectroscopy and Thermal BehaviourThe crystal structure of the nonasodium bis(hexahydroxoaluminate) trihydroxide hexahydrate Na9[Al(OH)6]2(OH)3 · 6H2O (4.5 Na2O Al2O3 · 13.5 H2O) (up to now described as 3 Na2O · Al2O3 · 6H2O, 4Na2O · Al2O3 · 13 H2O and [3 Na2O · Al2O3 · 6H2O] [xNaOH · yH2O], respectively) was solved. The X-ray single crystal diffraction analysis (triclinic, space group P1, a = 8.694(1) Å, b = 11.344(2) Å, c = 11.636(3) Å, α = 74.29(2)°, β = 87.43(2)°, γ = 70.66(2)°, Z = 2) results in a structure, consisting of monomeric [Al(OH)6]3- aluminate anions, which are connected by NaO6 octahedra groups. Furthermore the structure contains both, two hydroxide anions only surrounded by water of crystallization and OH groups of [Al(OH)6]3- aluminate anions and a hydroxide anion involved in three NaO6 coordination octahedra directly and moreover connected with a water molecule by hydrogen bonding. The results of 27Al and 23Na-MAS-NMR investigations, the thermal behaviour of the compound and possible relations between the crystal structure and the conditions of coordination in the corresponding sodium aluminate solution are discussed as well.
    Notes: Die Kristallstruktur des Nonanatrium-bis(hexahydroxoaluminat)-trihydroxid-hexahydrates Na9[Al(OH)6]2(OH)3 · 6H2O (4,5 Na2O · Al2O3 · 13,5 H2O) - bisher in der Literatur als 3Na2O · Al2O3 · 6H2O, 4Na2O · Al2O3 · 13 H2O bzw. [3 Na2O · Al2O3 · 6H2O] [x NaOH · y H2O] bezeichnet - wurde bestimmt. Aus der Einkristallröntgenstrukturanalyse (triklin, Raumgruppe P1, a = 8,694(1) Å, b = 11,344(2) Å, c = 11,636(3) Å, α = 74,29(2)°, β = 87,43(2)°, γ = 70,66(2)°, Z = 2) ergibt sich eine Struktur aus monomeren [Al(OH)6]3--Aluminatanionen, die über NaO6-Koordinationsoktaeder untereinander verbunden sind. Die Struktur enthält weiter zwei Hydroxidionen, die koordinativ nur mit Kristallwasser und OH-Gruppen der [Al(OH)6]3--Aluminatanionen in Verbindung stehen, sowie ein drittes, das an drei NaO6-Koordinationsoktaedern beteiligt und außerdem über eine Wasserstoffbrückenbindung mit einem Wassermolekül verbunden ist. Die Ergebnisse von 27Al- und 23Na-MAS-NMR-Messungen, das thermische Verhalten der Verbindung sowie mögliche Beziehungen zwischen der Struktur der kristallinen Verbindung und den Koordinationsverhältnissen in der entsprechenden Natriumaluminatlösung werden diskutiert.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966221027
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