On-line laser spectroscopy with thermal atomic beams

doi:10.1016/0029-554X(81)90906-X

Nuclear Instruments and Methods in Physics Research

Volume 186, Issues 1–2, 1 July 1981, Pages 193-199

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Abstract

On-line high resolution laser spectroscopy experiments have been performed in which the light from a cw tunable dye laser interacts at right angles with a thermal atomic beam.

^76–98Rb, ^118–145Cs and ^208–213Fr have been studied using the ionic beam delivered by the ISOLDE on-line mass separator at CERN while ^20–31Na and ^38–47K have been studied by setting the apparatus directly on-line with the PS 20 GeV proton beam. The principle of the method is briefly explained and some results concerning nuclear structure are given.

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We recall that collinear laser spectroscopy was also the means for the measurement of high-lying states in francium: in these, two-step laser excitation was used [47,48]. It has also allowed us to measure the isomeric shift between the well-known high spin nuclear isomer of 178Hf and its ground state [49]. In Fig. 10 we summarize some of the results obtained with this method used to study the mercury decay products.
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Hyperfine structure (hfs) measurements using on-line atomic-beam techniques are of great importance in the systematic study of spins and moments of nuclei far from stability. I will discuss the atomic-beam magnetic resonance (ABMR) method, and laser spectroscopy methods using crossed-beam geometry with a collimated thermal atomic-beam, and collinear geometry with a fast atomic-beam. The advantages of the different methods will be compared, and selected results from the extensive measurements at the ISOLDE facility, CERN, will be presented.
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On-line laser spectroscopy with thermal atomic beams

Abstract

Phys. Rev.

Phys. Rev. C