Argonne National Laboratory

Science Highlights

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This shows particle trajectories in the HELIcal Orbit Spectrometer (HELIOS) after a nuclear reaction took place in the target. (Image by Argonne National Laboratory.)
Short-lived isomeric beams to study atomic nuclei

New research from Argonne physicists sets the basis for using transfer reactions on high-spin isomeric beams in order to probe otherwise inaccessible aspects of nuclear structure.

April 10, 2018
This shows the leading-twist model-independent extraction of the imaginary part of the <sup style="vertical-align: top; position: relative; top: -0.15em;">4</sup>He Compton form factor containing <sup style="vertical-align: top; position: relative; top: -0.15em;">4</sup>He GPD information. The full red curve is a calculation based on a convolution model. The black-dashed curve is a calculation from the same model using different GPDs for the nucleons. The blue long-dashed curve is from an off-shell model. (Image courtesy of Argonne National Laboratory, Thomas Jefferson National Accelerator Facility and collaborating institutions.)
First exclusive measurement of deeply virtual Compton scattering off Helium-4: Toward the 3-D tomography of nuclei

A new study, co-led by Argonne, in Physical Review Letters discusses how researchers measured beam-spin asymmetry in coherent deeply virtual Compton scattering off a nucleus for the first time.

November 30, 2017
A new study, co-led by Argonne, shows that effects on the energies of excitation in nuclei can depend on how tightly the last neutron or proton is bound. (Image by Argonne National Laboratory.)
Effect of weak binding on the apparent spin-orbit splitting in nuclei

A new study in Physical Review Letters, co-led by Argonne, shows that effects on the energies of excitation in nuclei can depend on how tightly the last neutron or proton is bound.

November 30, 2017
Fig.1: The EBIS source installed on its test stand at Argonne National Laboratory.
Fast and Efficient Charge Breeding of the CARIBU EBIS

The Electron Beam Ion Source (EBIS), developed to breed CARIBU radioactive beams at ATLAS, is being tested off-line (see Figure 1).

October 6, 2017
Shape Coexistence in 68Ni and surrounding neutron-rich nuclei

The structure of neutron-rich nuclei in the vicinity of “doubly-magic” 68Ni has been the subject of much recent scrutiny once it was realized, on the one hand, that the subshell gap at neutron numb

October 6, 2017
The Difference a Pair of Neutrons Can Make

Add barium-146 to the short list of pear-shaped nuclei, though this may be more surprising than one might expect given the pear-shaped nature of its nearby neighbor barium-144.

October 6, 2017
Microscopic calculations for neutrino scattering from nuclei

Although neutrinos were postulated in 1930 and first observed in 1956, the fact that they are not massless was only demonstrated in the 1990's the values of their masses is still unknown.

October 6, 2015
Fig.1: The GRETINA array installed at ATLAS. The beam enters the CHICO-2 target chamber.
Completion of the first GRETINA Campaign at ATLAS

The first campaign of the GRETINA array at the ATLAS facility was completed on June 15, 2015.

June 17, 2015
Testing Time-Reversal Symmetry Using Ultra-cold Radium Atoms

New laser trapping methods for the search of an atomic EDM have been demonstrated with a first measurement on radium-225.

March 5, 2015
Measurement of the <sup>23</sup>Na(α,p)<sup>26</sup>Mg reaction at energies relevant for the production of Galactic <sup>26<sup/>Al

Gamma-ray astronomy has proven to be a powerful tool for understanding explosive nucleosynthesis in supernovae and novae.

April 17, 2014