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We present what we believe to be a novel technique to minimize UV-induced damage in experiments that employ second-harmonic generation cavities. The principle of our approach is to reduce the duty cycle of the UV light as much as possible to prolong the lifetime of the used optics. The low duty cycle is achieved by ramping the cavity into resonance for a short time during the experimental cycle when the light is used and tuning it to an off-resonant state otherwise.
View Article and Find Full Text PDFHigh-precision measurement of the atomic mass of and implications to isotope shift studies.
Eur Phys J A Hadron Nucl
July 2024
Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland.
The absolute mass of was determined using the phase-imaging ion-cyclotron-resonance technique with the JYFLTRAP double Penning trap mass spectrometer. A more precise value for the mass of is essential for providing potential indications of physics beyond the Standard Model through high-precision isotope shift measurements of Sr atomic transition frequencies. The mass excess of was refined to be from high-precision cyclotron-frequency-ratio measurements with a relative precision of .
View Article and Find Full Text PDFHigh voltage determination and stabilization for collinear laser spectroscopy applications.
Rev Sci Instrum
August 2024
Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany.
Fast beam collinear laser spectroscopy is the established method to investigate nuclear ground state properties such as the spin, the electromagnetic moments, and the charge radius of exotic nuclei. These are extracted with high precision from atomic observables, i.e.
View Article and Find Full Text PDFIsotopic and mineralogic bias introduced by pulverization of aragonite.
Rapid Commun Mass Spectrom
September 2024
Institute of Geosciences, University of Mainz, Mainz, Germany.
Rationale: Stable carbon and oxygen isotope data of biogenic and abiogenic aragonite are of fundamental relevance in paleoclimate research. Wet-chemical analysis of such materials requires well-homogenized, fine-grained powder. In the present study, the effect of different grinding/milling methods on sample homogeneity and the potential risk of unintentional calcite formation and isotope shift were evaluated.
View Article and Find Full Text PDFComb-Referenced Doppler-Free Spectrometry of the ^{200}Hg and ^{202}Hg Intercombination Line at 254 nm.
Phys Rev Lett
May 2024
Dipartimento di Matematica e Fisica, Università degli Studi della Campania "Luigi Vanvitelli", 81100 Caserta, Italy.
We report on precision spectroscopy of the 6s^{2} ^{1}S_{0}→6s6p ^{3}P_{1} intercombination line of mercury in the deep ultraviolet, by means of a frequency-comb referenced, wavelength-modulated, saturated absorption technique. This method allowed us to perform sub-Doppler investigations with an absolute frequency axis at 254 nm, while ensuring a relatively high signal-to-noise ratio. The absolute line center frequencies of the ^{200}Hg and ^{202}Hg bosonic isotopes were measured with a global uncertainty of 8 and 15 kHz (namely, 6.
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