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  • Springer  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Rayleigh-Taylor instability of a two-fluid layer under a general rotation field and a horizontal magnetic field (1996)
    Springer
    Astrophysics and space science 243 (1996), S. 291-313 
    Details
    ISSN: 1572-946X
    Keywords: 47.20.Bp ; 47.55.Hd ; 47.65.+a
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper the Rayleigh-Taylor instability (RTI) of a two-fluid layer system under the simultaneous action of a general rotation field and a horizontal magnetic field is presented. An approximate and an exact solution of the eigenvalue equation are calculated. These solutions are important not only to understand more deeply the physical problem but also to determine the correct numerical solutions. Numerical calculations are done for an unstable density stratification in the cases of horizontal magnetic field parallel and perpendicular to the horizontal component of the angular velocity. For an adverse density stratification, it is shown that in comparison to previous works, the horizontal magnetic field creates new angular areas (of the angle of propagation of the perturbation) at which the perturbation is stable and propagates as traveling waves. It is also shown that the vertical component of the angular velocity has a destabilizing effect because it works to eliminate the stable angular areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00644702
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Possibilities for francium spectroscopy in a light trap (1993)
    Springer
    Hyperfine interactions 81 (1993), S. 197-202 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An experimental program is under way to capture neutral francium atoms in a magneto-optic trap. Production and transport of the radioactive Fr atoms near to the trapping region have been tested, with a steady state of 107 atoms. If one hundred atoms are captured from the Maxwell-Boltzmann distribution into a magneto-optic trap, this will be a sufficient number for spectroscopy of the unknown excited states. These measurements would then open the path to investigations of parity-violating transitions in francium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567264
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Laser spectroscopy of nuclear reaction products: recent results and future prospects (1992)
    Springer
    Hyperfine interactions 74 (1992), S. 23-29 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser spectroscopic observations of nuclear reaction products produced with intensities of less than 104 atoms/second are now possible with several different methods. We describe the recoil into gas method which has recently been successful. This method is not Dopplerfree, but can give reasonable spectra if the resolution requirements of the spectra are not too high. It has the great advantage that it very efficiently uses the atoms, and spectra have been observed with primary production rates of less than 103 atoms/sec. Our recent work has concentrated on developing the recoil into gas method for the refractory element Hf. In order that the atoms could be cycled to produce many fluorescence photons, nitrogen and hydrogen impurity gases were added to the argon buffer gas to quench metastable levels to the ground state. In this way spectra could be obtained with fluxes of 104 atoms/second. Future prospects for trapping radioactive atoms in a magneto-optic trap will be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398613
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  • 4
    Electronic Resource
    Electronic Resource
    New applications of atomic physics to the study of nuclear properties (1993)
    Springer
    Hyperfine interactions 80 (1993), S. 1195-1203 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567484
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  • 5
    Electronic Resource
    Electronic Resource
    Laser traps for radioactive isotopes (1996)
    Springer
    Hyperfine interactions 97-98 (1996), S. 527-534 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The techniques of laser cooling and trapping now make it possible to observe large samples of stable atoms in a small volume at low temperature. This capability was recently extended to radioactive isotopes. This opens up new opportunities for the investigation of fundamental symmetries through measurements using radioactive atoms. In this paper we will discuss several fundamental measurements in atomic systems and how the ability to trap radioactive atoms will play an important role in improving the precision of such measurements. Measurements of the effects of the weak interaction are of particular note since they are becoming quite precise. In particular, we will describe in detail the system developed at Stony Brook to trap radioactive alkali atoms and measure weak interaction effects in francium isotopes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02150195
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    Paper (German National Licenses)
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