Letter to the Editor: Calculation of photoionized plasmas with an average-atom model

We use a simple average-atom model (NIMP) to calculate the distribution of ionization in a photoionization-dominated plasma, for comparison with recent experimental measurements undertaken on the Z-machine at the Sandia National Laboratory. The agreement between theory and experiment is found to be as good for calculations with an average-atom model as for those generated by more detailed models.

'Dancing at the English Opera':'Marie Salle's letter to the Duchess of Richmond

A letter from dancer Marie Salle to her patroness dated 1731 reveals her ambitions to dance at the English opera.