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Digitale Medien

High resolution photofragment spectroscopy of the gas phase methyl iodide ion (1989)

Lingbing, Chen ; Figger, H. ; Quint, W.

Springer

The European physical journal 13 (1989), S. 61-67

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ISSN: 1434-6079

Schlagwort(e): 33.20.K ; 33.80.G ; 36.90

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Photodissociation spectra of the molecular ion CH3I+ were obtained with a three stage quadrupole mass spectrometer. Starting from the $$\tilde X^2 E_{3/2} $$ ground state, theÃ 2 E 1/2 state was excited with a stilbene 3 cw dye laser. This state predissociates to CH + 3 +I. Measuring the intensity of the CH + 3 fragment ions as a function of the wavelength of the exciting laser, a spectrum showing vibrational and rotational structure was obtained. The vibrational structure was assigned to three progressions ofv 3 and new vibrational frequencies were determined. From a computer simulation of the (0, 1, 10) band rotational constants were derived. In particular, their dependence on the vibrationv 3 was studied.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01437344

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Laser spectroscopy of the 1s HFS of H-like ions at a bunched beam in the storage ring ESR (1998)

Seelig, P. ; Dax, A. ; Faber, S. ; [weitere]

Springer

Hyperfine interactions 114 (1998), S. 135-139

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ISSN: 1572-9540

Schlagwort(e): QED ; HFS ; hyperfine splitting ; hydrogen-like ; Bohr-Weisskopf

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The investigation of the 1s HFS provides a good possibility for testing QED effects in a combination of a strong electric and magnetic field. Here, we report about the laserspectroscopic measurements of the ground state hyperfine splitting in 207Pb81+. To handle this M1-transition in the infrared optical regime with its long lifetime, we developed a new detection technique using a bunched ion beam. For the observation of fluorescence light, a new mirror system is adapted to the emission characteristics from an ion beam at relativistic velocities.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012618404459

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Double Penning trap technique for precise g factor determinations in highly charged ions (2003)

Häffner, H. ; Beier, T. ; Djekić, S. ; [weitere]

Springer

The European physical journal 22 (2003), S. 163-182

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ISSN: 1434-6079

Schlagwort(e): PACS. 32.10.Dk Electric and magnetic moments, polarizability – 06.20.Jr Determination of fundamental constants – 31.30.Jv Relativistic and quantum electrodynamic effects in atoms and molecules

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: We present a detailed description of an experiment to determine the magnetic moment of an electron bound in hydrogen-like carbon. This forms a high-accuracy test of bound-state quantum electrodynamics. Special emphasis is given to the discussion of systematic uncertainties which limit our present accuracy. The described experimental setup may also be used for the determination of g factors in other highly charged ions.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1140/epjd/e2003-00012-2

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