β-delayed proton emission in the 100Sn region

摘要

β-delayed proton emission from nuclides in the neighborhood of 100Sn was studied at the National SuperconductingnCyclotron Laboratory (NSCL). The nuclei were produced by fragmentation of a 120 MeVucleonn112Sn primary beam on a Be target. Beam purification was provided by the A1900 Fragment Separator and thenRadio Frequency Fragment Separator. The fragments of interest were identified and their decay was studied withnthe NSCL Beta Counting System in conjunction with the Segmented Germanium Array. The nuclei 96Cd, 98Ing,n98Inm, and 99In were identified as β-delayed proton emitters, with branching ratios bβp = 5.5(40)%, 5.5+3n−2%,n19(2)%, and 0.9(4)%, respectively. The branching ratios for 89Ru, 91,92Rh, 93Pd, and 95Ag were deduced for thenfirst time with bβp = 3+1.9n−1.7%, 1.3(5)%, 1.9(1)%, 7.5(5)%, and 2.5(3)%, respectively. The bβp = 22(1)% value forn101Sn was deduced with higher precision than previously reported. The impact of the newly measured bβp valuesnon the composition of the type I x-ray burst ashes was studied.