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31.
32.
Ragnar Bengtsson 《Hyperfine Interactions》1992,75(1-4):3-22
A survey is made of new regions of nuclei, which may become accessible to nuclear orientation experiments as the on-line technique
matures. Basic nuclear properties that can be investigated by means of nuclear orientation are briefly reviewed. Examples
of systematic use of nuclear moments for revealing nuclear properties are given as is an example of of the combined use of
low-spin nuclear orientation data and high-spin heavy-ion reaction data. 相似文献
33.
34.
J. Johnsson H. Bladh N.-E. Olofsson P.-E. Bengtsson 《Applied physics. B, Lasers and optics》2013,112(3):321-332
Soot aggregates formed in combustion processes are often described as clusters of carbonaceous particles in random fractal structures. For theoretical studies of the physical properties of such aggregates, they have often been modelled as spherical primary particles in point contact. However, transmission electron microscopy (TEM) images show that the primary particles are more connected than in a single point; there is a certain amount of bridging between the primary particles. Particle sizing using the diagnostic technique laser-induced incandescence (LII) is crucially dependent on the heat conduction rate from the aggregate to the ambient gas, which depends on the amount of bridging. In this work, aggregates with bridging are modelled using overlapping spheres, and it is shown how such aggregates can be built to fulfil specific fractal parameters. Aggregates with and without bridging are constructed numerically, and it is investigated how the bridging influences the heat conduction rate in the free-molecular regime. The calculated heat conduction rates are then used in an LII model to show how LII particle sizing is influenced by different amounts of bridging. For realistic amounts of bridging ( $C_{\rm{ov}}\leq0.25$ ), the primary particle diameters were overestimated by up to 9 % if bridging was not taken into account. 相似文献
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The computer screen photo-assisted technique (CSPT), a recently reported method for characterization of colorimetric assays, has been modeled and the ability of the technique to retain key spectral features has been determined.The robustness of CSPT to operate with different kind of screens is demonstrated and a physical explanation of the result is provided.Simulated CSPT transmittances corroborate experimental results, and enable comparison with standard methods for qualitative and quantitative evaluation. 相似文献
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Anders K.H. Bengtsson 《Nuclear Physics B》1983,228(1):190-204
N = 1 supergravity is studied in a light-cone gauge. The non-linear transformations and the hamiltonian are constructed to order K in the coupling constant as a realization of the super-Poicaré algebra. The only input except the algebraic structure is the helicity content () and the dimensionality of the coupling constant. 相似文献
39.
A method of calculating high-spin states of nuclei within the cranked Nilsson-Strutinsky framework is presented and discussed in some detail. With this method, various high-spin features of nuclei are studied, such as shape coexistence, shape changes, band crossings and band terminations. Nuclei with different mass numbers such as 106Pd, 118Te, 158Yb and 187Au are used to exemplify the formalism. Comparisons are made with observed discrete high-spin states in 160, 165, 168Yb, 168Hf, 171Ta and 130Ce. 相似文献
40.