Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions

Exposure of self-assembled monolayers to highly charged ions and metastable atoms

The doses of neutral metastable argon atoms (Ar*) and highly charged xenon ions ~HCIs! required to damage self-assembled monolayers ~SAMs! of alkanethiolates on gold are compared in a set of experiments carried out concurrently. The extent of damage to the SAM is determined by developing the samples in a gold etching solution, then measuring the decrease in reflectivity of the gold; '10 Ar* are...

Parity Violation effects in highly-charged ions

Parity-nonconserving (PNC) atomic effects originate from the electroweak interaction of atomic electrons with the nucleus via Z-boson exchange. Comparing experimental results with theoretical predictions of the standard model allows to search for ”new physics” beyond the standard model (e.g., a second Z-boson or new fermions) [1]. In the case of neutral atoms here is the discrepancy between the...

Atomic Parity-Violation in Highly-Charged Ions

The investigation of parity-violation (PV) in forbidden atomic transitions is an active and fundamental research area, especially for its implications on the physics beyond the Standard Model [1]. Atomic transitions may be employed to study PV effects originating from weak neutral currents, i.e. due to the exchange of a Z boson between a nucleon of the nucleus and a bound electron. Experiments ...

Radioactive decays of highly-charged ions

Radiobiological Effects of Highly Charged Ions

The radiobiological effects of highly-charged-ion beams are of interest for tumortherapy and for radioprotection in space. In tumor therapy, high-energy protons and carbon ions exhibit an inverse dose profile, i.e. an increase of energy deposition with penetration depth. This allows a greater tumor dose for protons and carbon ions than for photons. In addition, for the heavier carbon ions, this...