Examination of n - T9 conditions required by N = 50, 82, 126 waiting points in r-process

Nguyen Duy Ly,Nguyen Ngoc Duy,Nguyen Kim Uyen,Vinh N T Pham

Figure 1. nn − T9 conditions needed for [panels (A)–(C)] 76Fe, 77Co, 78Ni, 79Cu and [panels (D)–(F)] 127Rh, 128Pd, 129Ag, 130Cd to be the N = 50 and N = 82 WP, respectively, in the r-process. The conditions were estimated using two-neutron separation energies, S2n, from AME2020, AME2020 with uncertainty ΔS2n [(AME ± Δ)], and FRDM, WS4, DZ10, and KTUY calculations. The grey shaded areas in panels (A)–(C), (E), and (F) [or (G)–(L)] denote the overall conditions for all the investigated N = 50 [or N = 82] WP. Yellow shaded are in panel (D) indicates the separation between conditions required by 76Fe and 79Cu.