Higher-angular-momentum states of the helium atom in a strong magnetic field

A considerable number of higher-angular-momentum states of the helium atom embedded in a magnetic field $B=0\mathrm{}-100\mathrm{a}.\mathrm{u}.\mathrm{}$ are investigated using a full configuration-interaction approach which is based on a nonlinearly optimized anisotropic Gaussian basis set of one-particle functions. Spin singlet and triplet states with positive- and negative-z parity are considered for the magnetic quantum number $M=\pm 2$ and positive-z parity states are studied for $M=\pm 3.$ Many of the excitations within these symmetries are investigated here. Total energies, ionization energies, as well as transition wavelengths as a function of the field strength are given. A list of stationarities with respect to the field strength which are of immediate interest to astrophysical applications is available.