Atom of radium 224

The atom of radium 224 has pear-shaped core

Physics found, that the radium-224 core (a radioactive nuclide of a chemical element of radium) is similar in the form not to a classical sphere or an ellipse, and to a pear, which allows to use it for check and specification of the standard ideas of how the atom is arranged.

On modern representations, the core of atom represents the compact and dense object consisting of separate elements nucleons: protons or neutrons. Unlike the electronic cover identical on the device to all atoms, the form of a core can strongly change at change of a proportion of neutrons and protons.

The physicists from the University of Liverpool opened earlier not meeting pear-shaped core “, experimenting cores with an unusual ratio of number of protons and neutrons. On the modern representations, some isotopes of heavy elements, such as uranium, radium, radon or thorium, can accept such form, however it wasn’t confirmed experimentally because at the majority of such atoms the smallest half-life period.

The group of physicists corrected this shortcoming, using CERN capacities for simultaneous synthesis of the necessary isotopes of these elements and the analysis of their properties. During the experiments scientists bombarded a plate from uranium with help of the protons accelerated by the synchrotron PSB. Special traps got cores of the necessary isotopes, cleared them of electrons and pushed together with a thin foil from nickel, cadmium and tin.

When such ions pass through a foil, it starts vibrating in the gamma range, both the frequency and nature of such fluctuations depends on a core form. It allowed scientists to define, that cores of radium-224 are really pear-shaped, whereas other isotopes, such as radon-220, appeared a usual ellipse form. According to physicists, further studying of radium-224 and heavier elements with a pear-shaped core will help to check standard model of atom and to specify it.
source:www.sciencenews.org