Search Results - "Andreas Dax"
-
1
Measuring the α-particle charge radius with muonic helium-4 ions
Published in Nature (London) (28-01-2021)“…The energy levels of hydrogen-like atomic systems can be calculated with great precision. Starting from their quantum mechanical solution, they have been…”
Get full text
Journal Article -
2
Buffer-gas cooling of antiprotonic helium to 1.5 to 1.7 K, and antiproton-to-electron mass ratio
Published in Science (American Association for the Advancement of Science) (04-11-2016)“…Charge, parity, and time reversal (CPT) symmetry implies that a particle and its antiparticle have the same mass. The antiproton-to-electron mass ratio Mp̄/me…”
Get full text
Journal Article -
3
High precision hyperfine measurements in Bismuth challenge bound-state strong-field QED
Published in Nature communications (16-05-2017)“…Electrons bound in highly charged heavy ions such as hydrogen-like bismuth 209 Bi 82+ experience electromagnetic fields that are a million times stronger than…”
Get full text
Journal Article -
4
Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio
Published in Nature (London) (28-07-2011)“…CPT symmetry upheld The principle of CPT (charge, parity, time) symmetry implies that antimatter particles have exactly the same mass and absolute value of…”
Get full text
Journal Article -
5
An X-ray free-electron laser with a highly configurable undulator and integrated chicanes for tailored pulse properties
Published in Nature communications (21-08-2023)“…X-ray free-electron lasers (FELs) are state-of-the-art scientific tools capable to study matter on the scale of atomic processes. Since the initial operation…”
Get full text
Journal Article -
6
Dynamic thermal analysis of pulsed blue diode pumped Ti:Sapphire amplifiers
Published in EPJ Web of Conferences (2024)“…We simulated the time-dependent temperature profiles inside a blue diode pumped Ti:Sapphire (Ti:Sa) laser amplifier for several different pulsed pump…”
Get full text
Journal Article Conference Proceeding -
7
THz streak camera method for synchronous arrival time measurement of two-color hard X-ray FEL pulses
Published in Optics express (06-02-2017)“…The two-color operation of free electron laser (FEL) facilities allows the delivery of two FEL pulses with different energies, which opens new possibilities…”
Get full text
Journal Article -
8
Recent progress of laser spectroscopy measurements of pionic helium
Published in EPJ Web of conferences (2022)“…We review the results of recent laser spectroscopy experiments on metastable pionic helium atoms at the Paul Scherrer Institute’s 590 MeV cyclotron facility…”
Get full text
Journal Article -
9
Two-color x-ray free-electron laser by photocathode laser emittance spoiler
Published in Physical review. Accelerators and beams (01-06-2021)“…Multispectral x-ray pump-probe experiments call for synchronized two-color free-electron lasers (FEL). This mode often implies a laborious setup or an…”
Get full text
Journal Article -
10
Publisher Correction: Measuring the α-particle charge radius with muonic helium-4 ions
Published in Nature (London) (18-03-2021)“…A Correction to this paper has been published: https://doi.org/10.1038/s41586-021-03360-2…”
Get full text
Journal Article -
11
Multipass laser cavity for efficient transverse illumination of an elongated volume
Published in Optics express (02-06-2014)“…A multipass laser cavity is presented which can be used to illuminate an elongated volume from a transverse direction. The illuminated volume can also have a…”
Get full text
Journal Article -
12
Hepatocyte growth factor induces Mcl‐1 in primary human hepatocytes and inhibits CD95‐mediated apoptosis via Akt
Published in Hepatology (Baltimore, Md.) (01-03-2004)“…CD95 (APO‐1/Fas)‐mediated apoptosis of hepatocytes plays a central role in the pathophysiology of various human liver diseases. Hepatocyte growth factor (HGF)…”
Get full text
Journal Article -
13
Primary human hepatocytes – a valuable tool for investigation of apoptosis and hepatitis B virus infection
Published in Journal of hepatology (01-06-2003)“…Background/Aims: Apoptosis is a key event in the pathophysiology of many liver diseases. Primary human hepatocytes (PHH) provide a useful model to study…”
Get full text
Journal Article -
14
SwissFEL double bunch operation
Published in Physical review. Accelerators and beams (01-12-2022)“…SwissFEL has a unique capability, among the normal conducting linac-based light sources, to simultaneously serve two separate undulator lines (Aramis and…”
Get full text
Journal Article -
15
First observation of the ground-state hyperfine transition in 209Bi80
Published in Physica scripta (23-09-2013)“…The long sought after ground-state hyperfine transition in lithium-like bismuth 209Bi80+ was observed for the first time using laser spectroscopy on…”
Get full text
Journal Article -
16
Laser spectroscopy of pionic helium atoms
Published in Nature (London) (01-05-2020)“…Charged pions 1 are the lightest and longest-lived mesons. Mesonic atoms are formed when an orbital electron in an atom is replaced by a negatively charged…”
Get full text
Journal Article -
17
Thermal lensing and small signal gain measurements in a pulsed blue diode pumped Ti:sapphire amplifier at room temperature
Published in Optics express (21-10-2024)“…Ultra short pulse Ti:sapphire lasers, crucial for most demanding applications, have traditionally been complex and costly due to their pump sources. GaN-based…”
Get full text
Journal Article -
18
High-resolution laser resonances of antiprotonic helium in superfluid 4He
Published in Nature (London) (17-03-2022)“…When atoms are placed into liquids, their optical spectral lines corresponding to the electronic transitions are greatly broadened compared to those of single,…”
Get full text
Journal Article -
19
A compact and cost-effective hard X-ray free-electron laser driven by a high-brightness and low-energy electron beam
Published in Nature photonics (01-12-2020)“…We present the first lasing results of SwissFEL, a hard X-ray free-electron laser (FEL) that recently came into operation at the Paul Scherrer Institute in…”
Get full text
Journal Article -
20
The helion charge radius from laser spectroscopy of muonic helium-3 ions
Published 19-05-2023“…Hydrogen-like light muonic ions, in which one negative muon replaces all the electrons, are extremely sensitive probes of nuclear structure, because the large…”
Get full text
Journal Article