» Home 

Welcome to the Max-Planck-Institut für Kernphysik (MPIK, Max Planck Institute for Nuclear Physics) in Heidelberg, one of 83 institutes and research establishments of the  Max-Planck-Gesellschaft (Max Planck Society). The MPIK does experimental and theoretical basic research in the fields of Astroparticle Physics (crossroads of particle physics and astrophysics) and Quantum Dynamics (many-body dynamics of atoms and molecules).


Latest news

Giants at the shell closure?

Laser spectroscopy detects unexpectedly large charge radii for calcium atomic nuclei

The isotopes of the element calcium continue to provide surprises: Only recently, the isotopes with the mass numbers 52 (Ca-52) and 54 (Ca-54) have been established as further “magic” and thus relatively stable nuclei within the isotope chain, but the results of the present laser spectroscopic measurements do not really fit into this picture. Scientists of the MPIK and the TU Darmstadt together with further groups have determined the charge radii of the isotopes Ca-49 to Ca-52 at the ISOLDE facility of CERN and found an unexpectedly rapid and undamped growth along this isotope chain. None of the existing nuclear structure theories is able to explain the scale of this swelling, the researchers report in the latest issue of the journal Nature Physics.

 DOI: 10.1038/NPHYS3645

Images of research at MPIK

  • Profile of the first beam of argon ions in the not yet cooled CSR on March 17, 2014
  • View onto the complex inner structure of the CSR just before its successful commissioning at cryogenic temperatures in April 2015
  • The atomic mass of a bound electron is balanced by QED contributions in increasing order, playing the role of a precision mass set
  • Electrodes of a Penning trap
  • A liquid-nitrogen-cooled GaAs photocathode producing cold electron beams
  • Momentum distribution of the electrons emitted in double ionization of argon
  • A view inside a femtosecond laser
  • Crystal of laser-cooled ions in a cryogenic Paul trap
  • A reaction microscope
  • Wave function for two electrons in doubly excited helium
  • Principle of the generation of an X-ray frequency comb by means of a laser-controlled gas
  • A matterless double slit consisting of two ultra-intense focused laser beams
  • Controllable delay of x-ray photons with nuclei
  • A laser-induced splitting gradient is used to store the complete frequency spectrum of a broadband pulse in a resonant medium
  • Tunnel ionization of a highly charged ion at relativistic laser intensities
  • An artist‘s view of a CTA array observing a particle shower
  • View of the full H.E.S.S. array with the four 12 m telescopes and the new 28 m H.E.S.S. II telescope
  • Image of a particle cascade viewed simultaneously by all five H.E.S.S. telescopes
  • A proton-lead collision observed by the LHCb detector
  • Predictions of the turbulent magnetic field excited ahead of a shock front
  • Integration of the acrylic vessels in the Double Chooz detector
  • Construction principle of the Nucifer detector
  • Elementary particles of the Standard Model and their hypothetical supersymmetric and seesaw partners
  • View into the GERDA cryostat with veto system partially immersed into the liquid argon
  • Photomultipliers for XENON1T in a support structure for cooling tests
  • Annihilation tracks of antiprotons in an emulsion detector
  • CAD drawing of the laser photodetachment line (ASTROLAB project)
  • Illustration of the rotational symmetry of an octahedron, used to construct models for fermion mixing


Riesen am Schalenabschluss?

Laserspektroskopie findet unerwartet große Ladungsradien...


Hochpräziser Test des relativistischen Kernrückstoßeffekts

Gute Übereinstimmung zwischen theoretisch vorhergesagtem...


Einstein-Medaille für Alexei Smirnov

Das Wissenschaftliche Kuratorium des Einstein-Hauses in...


Neuer Geschäftsführender Direktor des MPIK

Zum Jahreswechsel hat Prof. Dr. Werner Hofmann turnusmäßig...