共查询到20条相似文献,搜索用时 0 毫秒
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D. E. Murnick 《Hyperfine Interactions》1985,24(1-4):1-17
The use of lasers for nuclear physics research is widespread and growing rapidly. The major impact in nuclear structure research
has come from nuclear size and shape determinations for nuclei far from stability via high resolution isotope shift measurements.
In addition, systematic data on nuclear magnetic and quadrupole moments have been obtained via the hyperfine splitting resolved
in laser fluorescence studies of atomic spectra in both stable and unstable systems. The tunability, high intensity and inherent
polarization of laser light can be used to polarize atomic nuclei for nuclear reaction studies. The rapid efficient polarization
of unstable nuclei with lasers also presents opportunities for new research in nuclear physics.
In this paper the physics of the laser interaction for the studies indicated will be introduced. Some examples of work completed
and in progress will be presented primarily from on-line laser studies at charged particle accelerators. Extensions of current
research, particularly with respect to possible studies of short-lived nuclei, are discussed and the synergistic effects of
certain advances in quantum electronics and nuclear physics described. 相似文献
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B. G. Turrell 《Hyperfine Interactions》1985,22(1-4):97-110
This paper reviews how certain problems in solid state physics have been clarified by low temperature nuclear orientation and nuclear magnetic resonance of oriented nuclei. The advantages of these techniques are discussed; a brief survey of recent progress in traditional applications is given; new developments are discussed, and, finally, future trends are suggested. 相似文献
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The hyperfine interaction couples the atomic electrons and the nucleus, and because of this interaction, there is a fundamental link between the fields of atomic physics and nuclear physics. Of course, information flows in both directions through this link. This paper reviews in broad terms the previous applications of atomic physics methods to the study of nuclear properties and fundamental interactions, and then focuses on the possible applications of atom trapping methods to nuclear physics problems.Supported in part by the National Science Foundation. 相似文献
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Titanium was laser nitrided by means of free-electron laser irradiation in pure nitrogen atmosphere. The variation of pulse frequency and macropulse duration of the free electron laser resulted in δ-TiNx coatings with different thickness and different micro- and macroscopic morphologies. The coatings revealed, characteristic values for hardness, roughness and crystallographic texture, which originate from the growth mechanism, the solid-liquid interface energy and the strain. Further investigations showed that the dendritic growth is beginning at the surface and that the alignment of dendrites is normal to the surface. A correlation of the texture with the time structure of the laser pulses was found. Numerical simulations were performed and compared with the experimental results. The simulations can explain the experimental results. 相似文献
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H. Tamura 《The European Physical Journal A - Hadrons and Nuclei》2002,13(1-2):181-187
Using a germanium-detector array for hypernuclear γ spectroscopy (Hyperball), we measured B(E2) of the 7
ΛLi hypernucleus and observed a significant shrinkage of the 6Li core induced by a Λ-particle. In this way, nuclear properties can be drastically changed by introducing a Λ-particle, which
can be investigated by high-resolution hypernuclear γ spectroscopy. In the future neutron-rich hypernuclei will also be studied,
where interesting modifications of nuclear structure by a Λ-particle are expected.
Received: 1 May 2001 / Accepted: 4 December 2001 相似文献
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A. Gal 《Nuclear Physics A》2000,670(1-4):229-240
An overview of strangeness nuclear physics is given, focussing on spin dependent effects in Λ hypernuclei, on the ΛN → NN weak interaction in Λ hypernuclei, on the density dependence of the Σ nuclear potential and on double strangeness physics. A special emphasis is placed on the recent proposal to study experimentally Ξ− atoms. 相似文献
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A. W. Thomas 《The European physical journal. Special topics》2011,198(1):381-390
We discuss some of the many important questions in modern subatomic physics that have been addressed over the past two decades
at Mainz. These achievements range from precision studies of nucleon form factors, to nucleon spectroscopy, novel probes of
nucleon structure such as virtual Compton scattering and fundamental tests of quantum chromodynamics. In the future one may
expect to see this effort expanded to precision tests of physics beyond the Standard Model. 相似文献
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零折射率材料因其异常的电磁/光学特性在电磁波操控、新型天线和波导器件、非线性光学、光学吸收、电光调制等领域有着广泛的应用前景。文章首先介绍了零折射率材料的分类和实现方法,然后总结了零折射率材料的基本概念和电磁/光学特性,包括电磁波在零折射率材料中的折射、反射特性和“隧穿”效应,掺杂杂质对二维和三维体系的零折射率材料的影响,各向异性零折射率的电磁特性,零折射率材料内外的电场分布特性;最后介绍了零折射率材料的部分典型应用,并对零折射率材料的研究进行了展望。 相似文献
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Renormalized fixed-point Hamiltonians are formulated for systems described by interactions that originally contain point-like singularities (as the Dirac-delta and/or its derivatives). They express the renormalization group invariance of quantum mechanics. The present approach for the renormalization scheme relies on a subtracted T-matrix equation. 相似文献