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| 2. |
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| 3. |
- Noren, L, et al.
(author)
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A reinterpretation of the NH4Cu7S4 structure
- 1998
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In: J Alloys Comp. ; 281:2, s. 186-195
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Journal article (peer-reviewed)abstract
- The structure of NH4Cu7-xS4 has been investigated using X-ray single crystal diffraction at varying temperatures. The room temperature structure is best described as a tetragonal crystalline framework with channels incorporating some of the copper atoms in a disordered, almost amorpjous, manner.
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| 4. |
- Berg, M, et al.
(author)
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A compact range telescope for K+ measurements
- 1996
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In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - 0168-9002. ; 381:2-3, s. 267-274
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Journal article (peer-reviewed)abstract
- We present range telescopes for measurements of low energy K+ mesons together with first in-beam results. The hardware trigger, based on the observation of the mu(+) from the K+ --> mu(-) + nu(mu) decay channel, is designed for subthreshold hadron-nucleus
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| 5. |
- Berger, R, et al.
(author)
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On the stoichiometry, space group and polymorphism of TlCu7S4
- 1996
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In: J Alloys Compd. ; 237, s. 33-38
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Journal article (peer-reviewed)abstract
- The alleged necessity of changing the space group assignment of T1Cu(7)S(4) has been refuted on the basis of room-temperature neutron powder-diffraction data. The structure conforms well to I4/m, previously also found for the corresponding ternary selenide.
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| 6. |
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| 7. |
- Elmer, R, et al.
(author)
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K+ emission in symmetric heavy ion reactions at subthreshold energies
- 1996
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In: PHYSICAL REVIEW LETTERS. - : AMER INST PHYSICS. ; 77:24, s. 4884-4886
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Journal article (peer-reviewed)abstract
- Subthreshold K+ production cross sections have been measured in symmetric Ne + NaF, Ni + Ni, and Au + Au collisions at 1.0A GeV. The mass dependence is strong, close to A(2). The angular distributions are nonisotropic in the center-of-mass system. Introdu
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| 8. |
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| 9. |
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| 10. |
- Lundgren, Ted, 1959, et al.
(author)
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A secondary ion mass spectroscopic study of the elemental composition pattern in rat incisor dental enamel during different stages of ameloblast differentiation.
- 1998
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In: Archives of oral biology. - 0003-9969. ; 43:11, s. 841-8
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Journal article (peer-reviewed)abstract
- In most earlier studies on the elemental composition pattern of dental enamel, a picture is presented which describes a limited region. In this study, estimates of the incorporation of some critical elements into enamel were correlated with the differentiation stages of the ameloblasts through out the whole tooth. Elemental analyses of rat incisor dental enamel during the secretory, transitional and maturation phases were performed using two different modes of secondary ion mass spectrometry (SIMS). The results were presented as ion images and three-dimensional spatial resolution graphs. In the elemental images of 23Na, 26CN, 35Cl and 39K, counts were detected during the secretory and maturation phases of amelogenesis. Variations were interpreted as resulting from secretion of elements during the secretory phase and resorption during the maturation phase. In line scans the ion yield from enamel during different stages of differentiation of the ameloblasts was analysed. The elements investigated were 12C, 19F, 23Na, 31P, 39K and 77CaCl. As seen in the images, most elements exhibited a higher ion yield during the earlier stages of secretion, and lower yields during the maturation-phase resorption. Cl, together with P, increased during the phases of maturation. In the most apical portions of the teeth, corresponding to a presecretory phase, an inverse pattern was seen for most of the elements. If the surface yield was high at the onset of the secretory phase, the presecretory yields were lower, and vice versa.
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