continuation in the coupling constant
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Although many of excited states are resonances [@kb] in nuclear physics, they seldom receive special attention in theoretical nuclear structure calculations. The reason is obvious: The solution of the nuclear many-body Schrödinger equation poses insurmountable difficulties even for bound states in most of the cases, and the solution for the resonances is mostly limited to two-body problems. The theoretical nuclear model calculations therefore usually treat the resonances as bound states. This approximation, however, can only be justified for very narrow resonances.

In the recent years many theoretical and experimental nuclear physicists have concentrated their research activity on unstable nuclei and the new phenomena discovered have revived the interest in resonance states as well. These nuclei are very rich in resonance states, and one of theIAAF World Championships 2013: Full Schedule for Friday's Action in Moscow

The 2013 IAAF World Championships are slowly drawing to a close in Moscow this week, as the world's best and brightest track and field athletes attempt to capture gold in the sport's second-most prestigious event.

Thus far, the action has not disappointed. Superstar figures in the sport like Usain Bolt, Mo Farah and others have continued their rampage through their respective events, setting up what should be an epic weekend. The nine-day event that is the World Championships, held every two years in non-Olympic times, will come to a close Sunday.

Bolt and Farah will both return to the track Friday after a couple days off for rest and relaxation. The Jamaican Bolt will try to qualify for Saturday's 200-meter