In addition, he questions the independence of the researchers.

Taleyarkhan teaches physics at Purdue University, and Xu and Butt work in his laboratory. The two acknowledge that Taleyarkhan helped them designing and setting up the acoustic test cell. As Purdue communicated, the experiments had begun when Taleyarkhan was still employed at Oak Ridge National Laboratory, and had been finished before Xu and Butt joined his lab. "We did our experiment and data analysis independently", says Xu.

Another article on the bubble fusion result, peppered with interesting links. We should soon know if this can be reproduced.