The β-decay half-lives of 38 neutron-rich isotopes from Kr36 to Tc43 have been measured; the half-lives of Kr100, Sr103-105, Y106-108, Zr108-110, Nb111,112, Mo112-115, and Tc116,117 are reported here. The results when compared with previous standard models indicate an overestimation in the predicted half-lives by a factor of 2 or more in the A≈110 region. A revised model based on the second generation gross theory of β decay better predicts the measured half-lives and suggests a more rapid flow of the rapid neutron-capture process (r-matter flow) through this region than previously predicted.
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy