Monday 24th June 2013
	Chair: Eva Lindroth
09:00-10:00	PT: Trapped antihydrogen: the ALPHA experiment at CERN   Jeff Hangst (Aarhus University/CERN)
	It has been 100 years since Niels Bohr proposed his famous model for the hydrogen atom. It is thus very exciting that we are now on the brink of being able to experimentally study antihydrogen - the antimatter equivalent of hydrogen. The question to be addressed is fundamental and profound: “Do matter and antimatter obey the same laws of physics?” The so-called Standard Model of fundamental particles and interactions requires that hydrogen and antihydrogen have the same spectrum. At CERN in Geneva, the ALPHA collaboration is working to test this requirement by performing direct spectroscopic measurements on trapped atoms of antihydrogen. Antihydrogen atoms have been produced in quantity at CERN since 2002, when the ATHENA collaboration demonstrated how to mix cryogenic plasmas of antiprotons and positrons to produce low energy anti-atoms. I will discuss the newest development along the road to antihydrogen spectroscopy: magnetically trapped antihydrogen. In November of 2010 we reported the first trapping of antihydrogen atoms in a magnetic multipole trap. The atoms must be produced with an energy - in temperature units - of less than 0.5 K in order to be trapped. Subsequently, we have shown that trapped antihydrogen can be stored for up to 1000 s, and we have performed the first resonant quantum interaction experiments with anti-atoms. We have recently demonstrated a new technique to study the gravitational behaviour of antihydrogen atoms in free-fall. I will discuss the many developments necessary to realise trapped antihydrogen, and I will consider the future of this rapidly evolving field of study.
	Session 1a: T18 Cold ions, atoms and molecules   Chair: Michael Drewsen
10:30-11:00	IT: Physico-chemistry in ultracold gases: a prototype atom-molecule process   Olivier Dulieu (Laboratoire Aimé Cotton, Campus d’Orsay)
	We present a dynamical model for photoassociation (PA) of ultracold alkali atoms with ultracold alkali molecules in their rovibrational ground state to create ultracold excited trimer molecules. The rate is found significantly smaller than in the atom-atom case under typical MOT conditions, but is promising in the nanokelvin domain.
11:00-11:30	IT: Investigating three-body recombination in an ion trap   Johannes Hecker-Denschlag (Ulm University)
	I will report on two recent experiments in our group where we have investigated three-body recombination of three Rb atoms as well as three-body recombination of two Rb atoms with a single Rb+ ion. We obtain new insights on the reaction paths, on the released reaction energies and on which molecular quantum states are populated in the recombination process.
11:30-12:00	IT: Quantum simulations with trapped ions   Christian Roos (Institute for Quantum Optics and Quantum Information)
	Strings of laser-cooled trapped ions can be precisely controlled and manipulated with coherent narrow-band laser light. The use of entangling laser-ion interactions opens up the prospect of simulating the physics of interacting spins. I will present experiments that we have carried out with small ion crystals and discuss the prospects of doing experiments with long ion strings.
12:00-12:15	CT: Sisyphus Cooling of Electrically Trapped Polyatomic Molecules   Alexander Prehn (Max-Planck-Institute of Quantum Optics)
	T18-2-Prehn.pdf
12:15-12:30	CT: Adiabatic Cooling of Single Trapped Ions: Towards Ultra-cold Chemistry and Molecular Spectroscopy   Gregers Poulsen (Aarhus University)
	T18-23-Poulsen.pdf
	Session 1b: T1 Atomic and molecular astrophysics   Chair: David Field
10:30-11:00	IT: Quantum reaction dynamics at low temperature for astrochemistry   Pascal Honvault (CNRS-University of Burgundy)
	We will present the theoretical study of reactive collisions of astrophysical interest, such as the OH + atom (C,N,O) reaction and the H+ + H2(v=0,j) ---> H+ + H2(v',j') reaction (and its isotopic variants). We employ a time independent quantum mechanical approach to determine the integral and differential cross sections as well as the rate coefficients.
11:00-11:30	IT: Polycyclic Aromatic Hydrocarbons - catalysts for interstellar molecular hydrogen formation?   Liv Hornekær (Aarhus University)
	In a series of experiments we demonstrate that hydrogen addition to neutral polycyclic aromatic hydrocarbon (PAH) molecules leads to the formation of highly super-hydrogenated PAHs and that these super-hydrogenated species can catalyse molecular hydrogen formation. The role of PAHs in interstellar molecular hydrogen formation will be discussed.
11:30-12:00	IT: Negative hydrogen ions from collisions of H-containing molecular species: a general process   Béla Sulik (MTA Institute for Nuclear Research (Atomki) )
12:00-12:15	CT: Spatial extent of exciton states in DNA and RNA revealed by circular dichroism   Lisbeth Munksgaard Nielsen (Aarhus University)
	T12-5-Nielsen.pdf
12:30-15:00	Poster session
	Session 2a: T11 Highly charged ions / T5 Atomic spectroscopy   Chair: Béla Sulik
15:00-15:30	IT: Population control of heavy ions by using ion channeling   Toshiyuki Azuma (Advanced Science Institute RIKEN)
	As a unique and powerful approach to investigate the dynamical response of atomic systems to the intense mono-energetic x-ray radiation, our group has developed a method of the selective excitation of heavy atomic ions from Ar to U accompanying one or a few electrons. It has been realized by a combination of accelerated ions up to the relativistic regime and a thin single crystal target.
15:30-16:00	IT: X-ray laser spectroscopy with free-electron lasers and synchrotron radiation   José R. Crespo López-Urrutia (Max Planck Institute for Nuclear Physics)
	X-ray photons transport the fusion energy inside stars. By extending laser spectroscopy into the X-ray region, high resolution studies of the relevant scattering processes in the femtosecond range have become possible. For this, we have exposed in an electron beam ion trap key highly charged ions such as Fe16+, Fe21+..24+ and Kr34+ to X-ray beams at LCLS (
16:00-16:30	IT: Nuclear effects on atomic transitions: Storage-ring measurements of hyperfine induced decay rates in berylliumlike ions   Stefan Schippers (Justus-Liebig-University Giessen)
	Hyperfine induced (HFI) transitions in atomic ions are important for building ultra-precise atomic clocks and for the determination of isotopic abundance ratios in cosmic objects. The effect of HFI transitions is particulary strong in Be-like ions. Corresponding laboratory measurements have been performed only recently by employing electron-ion collision spectroscopy at a heavy ion storage-ring. Experimental methods and results are discussed in the light of recent state-of-the-art atomic structure calculations.
16:30-16:45	CT: Relativistic, QED, and finite nuclear mass corrections for low lying states of beryllium   Mariusz Puchalski (Adam Mickiewicz University, Poznan)
	T5-36-Puchalski.pdf
16:45-17:00	CT: Electron capture at low velocity in the collision of Ar17+ ions with atoms, clusters and solids   Emily Lamour (Université Pierre et Marie Curie)
	T11-6-Lamour.pdf
	Session 2b: T3 Electron collisions / T7 Molecular reaction dynamics   Chair: Henrik B. Pedersen
15:00-15:30	IT: Dielectronic recombination with heavy ions as a sensitive tool for probing nuclear properties   Carsten Brandau (EMMI/GSI, Darmstadt)
	In my presentation I will discuss the utilization of the spectroscopic properties of DR for the investigation of nuclear properties. The sensitivity of the DR approach at heavy ion storage rings enables such studies not only for stable isotopes but also for artificially in-flight synthesized radioisotopes and nuclear isomers. Experiments carried out with heavy Li-like ions at the storage rings ESR and TSR will be shown.
15:30-16:00	IT: Electron and positron impact ionization of atoms, molecules and clusters   Alexander Dorn (Max Planck Institute for Nuclear Physics)
	Novel studies of atomic and molecular ionization and fragmentation by electron impact will be discussed. The coincident detection of the momentum vectors of all charged particles produced provides detailed insight into the collision dynamics. Some of the cases presented are ionization of aligned H2 molecules and of small noble gas clusters of different size, the fragmentation pathways of bio-molecules and collisions involving positron projectiles.
16:00-16:30	IT: Negative Ion reaction dynamics   Roland Wester (Innsbruck University)
	Experimental investigations of the dynamics of negative ion reactions are presented. At the focus of our work is the nucleophilic substitution reaction, an important reaction in organic chemistry. By analysing differential scattering cross sections, we have found several distinct reaction mechanisms. These results are compared with direct dynamics simulations.
16:30-16:45	CT: Using Dissociative Electron Attachment as a Fingerprinting Tool to Detect Explosives   Johannes Postler (University of Innsbruck)
	T3-9-Postler.pdf
16:45-17:00	CT: Ultrafast Charge Migration in a Biomolecule   Jason Greenwood (Queens University Belfast)
	T8-12-Greenwood.pdf