Beta-Decay Half-Lives and Neutron-Emission Probabilities of Very Neutron-Rich Y to Tc Isotopes

Improving systematic predictions ofβ-delayed neutron emission probabilities

“…While papers have touched on the qualitative relationship [9,26,27] between T 1/2 and P n , surprisingly, a quantitative global study involving these two basic observables has never been performed. As the integral in Eq.…”

Beta-decay properties of the neutron-rich 94–99Kr and 142–147Xe isotopes

“…Since then there has been surprisingly little progress in the investigation of neutron-rich Kr and Xe nuclei. A number of short-lived Kr and Xe isotopes were measured at various ISOL facilities [4][5][6][7][8][9][10][11], however, these studies were limited to 91−94 Kr and 139−143 Xe. The heaviest noble-gas isotopes known so far, 95 Kr and 144,145 Xe [12], were in fact obtained in earlier experiments utilising emanation, chemical separation and gas-jet techniques [13][14][15][16][17].…”

β-Decay Half-Lives of Very Neutron-Rich Kr to Tc Isotopes on the Boundary of ther-Process Path: An Indication of Fastr-Matter Flow

“…The results indicate that considerable improvements in the global abundances of the isotopes can be achieved by assuming a quenching of the N = 82 shell gap. The properties of most of these crucial r-process nuclei are, however, currently unknown due to their extremely low production yields in the laboratory.A number of experimental studies on nuclei around neutron-rich krypton to technetium have been performed to investigate the region of the r-process path near N = 82 [7][8][9]. In the current work, we report on a first systematic study of the β-decay properties of very exotic, neutron-rich 36 Kr to 43 Tc nuclides that contribute to the r-process.…”

“…A number of experimental studies on nuclei around neutron-rich krypton to technetium have been performed to investigate the region of the r-process path near N = 82 [7][8][9]. In the current work, we report on a first systematic study of the β-decay properties of very exotic, neutron-rich 36 Kr to 43 Tc nuclides that contribute to the r-process.…”

“…3(a)-(h). The underestimation of T 1/2 for the N = 65 isotones by the FRDM+QRPA predictions, which have been reported as being due to the domination of low-lying Gamow-Teller strength in the case of Zr and Nb [7], is also observed here for Rb, Sr, and Y. The KTUY+GT2 model overpredicts the T 1/2 values for Mo and Tc below N = 70, but generally reproduces the experimental data more accurately than the FRDM+QRPA calculation does for the other isotopic chains.…”