Preparation of circular Rydberg states in helium with $n\ge 70$ using a modified version of the crossed-fields method

A. A. Morgan, V. Zhelyazkova, S. D. Hogan

Circular Rydberg states with $n=70$ have been prepared in helium using a modified version of the crossed-fields method. This approach to the preparation of high-$n$ circular Rydber…