Dielectronic satellites of the Heβ line of the Si XIII ion in a dense laser plasma

The first precision measurements of the wavelengths and identifications were made of the satellites of the Heb line of the Si XIII ion in the emission spectrum of a laser plasma. These satellites were the result of radiation decay of the 1s3l12l2 levels of the Si XII ion. The wavelengths were determined more accurately for the 1s3l13l2 configurations. The experimental results obtained were compared with calculations carried out by various methods. The structure of the relative intensities of the 1s3l13l2 satellites indicated that their emission occurred mainly in a thin overdense plasma region with Ne>Necr.