The DR Project

A programme is underway to calculate multi-configuration intermediate coupling dielectronic recombination rate coefficients from the (ground plus) metastable levels of an ion to all possible final states, resolved by level, and/or bundling, appropriate for the GCR modeling. It will cover elements applicable to astrophysics and magnetic fusion viz. He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, Ca, Ti, Cr, Fe, Ni, Zn, Kr, Mo and Xe. The first 

It is noted that the level 2 approach encompasses the LS- forbidden autoionization rates which can occur in low-Z ions, the LS-forbidden radiative rates which occur in higher Z ions and finally, dielectronic recombination via fine-structure transitions which is completely absent in LS-coupling. The latter gives rise to a large underestimate of the low-temperature dielectronic recombination rate coefficient in some iso-electronic sequences. Some results are illustrated in Fig. 18.9. 

The ADAS Project depends on and acknowledges the contribution of all its participants. 

Summers Atomic Data and Analysis Structure, JET Joint Undertaking Report JET-IR(94)06 (1994) 

Summers The IDL-ADAS Users Manual. http //adas.phys.strath.ac.uk 

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