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Atomic Emission Spectroscopy: Lab

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

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Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

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Laser isotope separation of rare earth elements.

N V Karlov, B B Krynetskii, V A Mishin

|March 4, 2010

Summary

Laser isotope separation using selective two-step photoionization was demonstrated for rare earth elements. This technique precisely measures hyperfine structure and is suitable for rare and unstable isotopes.

Area of Science:

Atomic Physics
Laser Spectroscopy
Isotope Separation

Background:

Rare earth elements (neodymium, samarium, europium, gadolinium, dysprosium, erbium) possess similar atomic properties, making them ideal for comparative studies.
Laser isotope separation (LIS) is crucial for obtaining specific isotopes for various applications.

Purpose of the Study:

To demonstrate the efficacy of selective two-step photoionization for LIS of rare earth elements.
To develop a precise method for measuring hyperfine structure in odd isotopes.
To assess the feasibility of LIS for rare and unstable isotopes.

Main Methods:

Selective two-step photoionization combined with ion mass filtration.
Gas-phase collision experiments to measure excitation energy transfer cross sections.

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Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures

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Electron-beam evaporation for generating dense atomic vapor.

Main Results:

Successful laser isotope separation of multiple rare earth elements.
Measurement of excitation energy transfer cross sections (e.g., Europium isotopes: sigma = 1.4 x 10(-13) cm(2)).
Precise hyperfine structure measurements for dysprosium and erbium.
Estimation of ionization cross sections for excited states (approx. 10(-17) cm(2)).
Demonstration of dense gadolinium atomic vapor generation via electron-beam evaporation.

Conclusions:

Selective two-step photoionization is a versatile technique for LIS of rare earth elements.
The developed method enables accurate hyperfine structure determination, including for rare and unstable isotopes.
Electron-beam evaporation is a viable method for producing atomic vapor suitable for LIS.