Proton scattering reveals the secrets of strongly-correlated proton-neutron pairs in atomic nuclei

An international research collaboration has reported the first experimental evidence that the strongly correlated proton-neutron pairs found in an atomic depend on nuclear structure. The experiment, conducted on a new beam line at the Osaka cyclotron facility, demonstrated the dominance of tensor interactions in the neutron pickup reaction. It is hoped that the findings will improve our understanding of neutron stars and other celestial bodies.

X chromosome: How genetics becomes egalitarian

In cell biology, men and women are unequal: men have an X chromosome, while women have two. How can we get around this difference? Geneticists observed how the second X chromosome in females gradually becomes inactive in order to avoid an overdose of genes encoded by the X. They also found that several genes bypassed this inactivation, which varied according to the tissue and life phases of the cell.