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In a paper appearing in this issue of Physics Letters A, Ericsson et al.raise some critical comments on the experiment [F. Cardone, R. Mignani, A.Petrucci, Phys. Lett. A 373 (2009) 1956] we carried out by cavitating asolution of thorium-228, which evidenced its anomalous decay behaviour, thusconfirming the results previously obtained by Urutskoev et al. by explosion oftitanium foils in solutions. In this Letter, we reply to these comments. In ouropinion, the main shortcomings of the criticism by the Swedish authors are dueto their omitting of inserting our experiment in the wider research stream ofpiezonuclear reactions, and to the statistical analysis they used, which doesnot comply with the rules generally accepted for samples with small numbers.However, apart from any possible theoretical speculation, there is the basicfact that two different experiments (ours and that by Urutskoev et al.),carried out independently and by different means, highlight an analogousanomaly in the decay of thorium subjected to pressure waves. Such a convergenceof results shows that it is worth to further carry on experimentalinvestigations, in order to get either a confirmation or a disproof of theinduced-pressure anomalous behaviour of radioactive nuclides even differentfrom thorium.

Reply to the "Comment on 'Piezonuclear decay of thorium' [Phys. Lett. A 373 (2009) 1956]" [Phys. Lett. A 373 (2009) 3795] by G. Ericsson et al