Alpha decay half-life of 147Sm in metal samarium and Sm2O3

In order to investigate the possible influence of metallic environment on the alpha decay process, we have measured the Sm-147 activities in the hosts of metal samarium and Sm2O3 . The Sm-147 half-life was found to be (1.06 +/- 0.01)x10(11) y in metal samarium and (1.07 +/- 0.01)x10(11) y in Sm2O3 , respectively. No significant change has been observed within the experimental uncertainty. The absolute half-life presented here is consistent with the recommended value.