CONTENTS. After a radioactive nucleus undergoes an isobaric transition (beta emission, positron emission, or electron capture), it usually contains too much energy to be in its final stable or daughter state. Nuclei in these intermediate and final states are isomers, since they have the same atomic and mass numbers.
In the fall, it was widely reported that people from four U.S. states may need a passport to fly domestically this year. Now, the Department of Homeland Security has increased the list of U.S. locations not offering state driverâs licenses that comply with new federal regulations known as the Real ID Act.
Minnesotansâ driverâs licenses are on the verge of not being accepted as valid identification for airline travel. The Department of Homeland Security, or DHS, could implement new national driverâs license standards for commercial flying as early as next year, and Minnesota is one of four states deemed to have noncompliant driverâs licenses.