Grating tuned Ti:Sa laser for in-source spectroscopy of Rydberg and autoionizing states

Teigelhöfer, A.; Bricault, P.; Chachkova, O.; Gillner, M.; Lassen, J.; Lavoie, J. P.; Li, R.; Meißner, J.; Neu, W.; Wendt, Κ.

doi:10.1007/s10751-010-0171-x

Cited by 42 publications

(12 citation statements)

References 22 publications

(20 reference statements)

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“…The search for new second-step transitions ( λ 2 ) to higher lying atomic states, was performed at the TRIUMF-ISAC radioactive ion beam facility with the TRILIS laser ion source21. The fundamental output of a widely tunable grating-based Ti:sapphire (Ti:Sa) laser22 was used to scan λ 2 between 710 and 915 nm in a three-colour scheme {216; λ 2 ; 532}, see Fig. 1c.…”

Section: Resultsmentioning

confidence: 99%

Measurement of the first ionization potential of astatine by laser ionization spectroscopy

et al. 2013

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The radioactive element astatine exists only in trace amounts in nature. Its properties can therefore only be explored by study of the minute quantities of artificially produced isotopes or by performing theoretical calculations. One of the most important properties influencing the chemical behaviour is the energy required to remove one electron from the valence shell, referred to as the ionization potential. Here we use laser spectroscopy to probe the optical spectrum of astatine near the ionization threshold. The observed series of Rydberg states enabled the first determination of the ionization potential of the astatine atom, 9.31751(8) eV. New ab initio calculations are performed to support the experimental result. The measured value serves as a benchmark for quantum chemistry calculations of the properties of astatine as well as for the theoretical prediction of the ionization potential of superheavy element 117, the heaviest homologue of astatine.

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Section: Resultsmentioning

confidence: 99%

Measurement of the first ionization potential of astatine by laser ionization spectroscopy

et al. 2013

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“…The resonant laser ion source RILIS at ISOLDE [83] is now the mostly used of all ion sources at ISOLDE. It has also been well established at TRIUMF [84] and was demonstrated at the Holyfield Facility at Oak Ridge National Laboratory (ORNL) [85]. Developments towards a laser ion source at SPIRAL2 are going on at ALTO and at GANIL.…”

Section: Collinear Laser Spectroscopy (Cls)mentioning

confidence: 99%

Precision atomic physics techniques for nuclear physics with radioactive beams

Blaum¹,

Dilling²,

2013

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Atomic physics techniques for the determination of ground-state properties of radioactive isotopes are very sensitive and provide accurate masses, binding energies, Q-values, charge radii, spins, and electromagnetic moments. Many fields in nuclear physics benefit from these highly accurate numbers. They give insight into details of the nuclear structure for a better understanding of the underlying effective interactions, provide important input for studies of fundamental symmetries in physics, and help to understand the nucleosynthesis processes that are responsible for the observed chemical abundances in the Universe. Penning-trap and and storage-ring mass spectrometry as well as laser spectroscopy of radioactive nuclei have now been used for a long time but significant progress has been achieved in these fields within the last decade. The basic principles of laser spectroscopic investigations, Penning-trap and storage-ring mass measurements of short-lived nuclei are summarized and selected physics results are discussed. † going to cryogenic temperatures, or enhancing the induced signal by using higher charge states and/or longer accumulation times. Ideal applications for this method are mass measurements of super-heavy element (SHE) isotopes for nuclear structure studies as they are performed at SHIPTRAP [25,26]. SHE are produced in minuscule quantities, and typically have half-lives of hundreds of milliseconds to a few seconds. A proof-ofprinciple experiment is planned at the TRIGA reactor facility TRIGA-TRAP at Mainz University [27] and applications for HITRAP with highly charged ions are foreseen [28]. Requirements for Mass Measurements of Radioactive IonsThe specific requirements for the mass measurements of radioactive ions stem from the parameters of the ions themselves. For example the required sensitivity (depending on the production yield) and measurement speed (depending on the half-life) as well as the envisaged application which dictates the required precision. In order to be meaningful, all measurements should deliver reliable data, hence precise and accurate. The physics requirements can be categorized with the corresponding relative precision as follows:• nuclear structure, δm/m ≈ 1 × 10 −7• nuclear astrophysics, δm/m ≈ 1 × 10 −7/−8 • test of fundamental symmetries, neutrino physics, δm/m ≈ 1 × 10 −8/−9

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“…Details of the laser system are given in [22][23][24]. For wide range scans we use a modified laser design, featuring a diffraction grating in Littrow configuration for frequency selection [25]. This laser type has an output power of up to 2 W and can be tuned mod-hop-free from 700 nm to 1020 nm.…”

Section: A Setupmentioning

confidence: 99%

Laser spectroscopy of the 1001-nm ground-state transition in dysprosium

et al. 2018

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We present the first direct excitation of the presumably ultra-narrow 1001 nm ground state transition in atomic dysproium. By using resonance ionization spectroscopy with pulsed Ti:sapphire lasers at a hot cavity laser ion source, we were able to measure the isotopic shifts in the 1001 nm line between all seven stable isotopes. Furthermore, we determined the upper level energy from the atomic transition frequency of the 164 Dy isotope as 9991.004(1) cm −1 and confirm the level energy listed in the NIST database. Since a sufficiently narrow natural linewidth is an essential prerequisite for high precision spectroscopic investigations for fundamental questions we furthermore determined a lower limit of 2.9(1) µs for the lifetime of the excited state.

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Grating tuned Ti:Sa laser for in-source spectroscopy of Rydberg and autoionizing states

Cited by 42 publications

References 22 publications

Measurement of the first ionization potential of astatine by laser ionization spectroscopy

Measurement of the first ionization potential of astatine by laser ionization spectroscopy

Precision atomic physics techniques for nuclear physics with radioactive beams

Laser spectroscopy of the 1001-nm ground-state transition in dysprosium

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