Beta-delayed proton emission in the 100Sn region

Abstract

Beta-delayed proton emission from nuclides in the neighborhood of 100Sn was studied at the National Superconducting Cyclotron Laboratory. The nuclei were produced by fragmentation of a 120 MeV/nucleon 112Sn primary beam on a Be target. Beam purification was provided by the A1900 Fragment Separator and the Radio Frequency Fragment Separator. The fragments of interest were identified and their decay was studied with the NSCL Beta Counting System (BCS) in conjunction with the Segmented Germanium Array (SeGA). The nuclei 96Cd, 98Ing, 98Inm and 99In were identified as beta-delayed proton emitters, with branching ratios bp = 5.5(40)%, 5.5+3 -2%, 19(2)% and 0.9(4)%, respectively. The bp for 89Ru, 91,92Rh, 93Pd and 95Ag were deduced for the first time with bp = 3+1.9 -1.7%, 1.3(5)%, 1.9(1)%, 7.5(5)% and 2.5(3)%, respectively. The bp = 22(1)% for 101Sn was deduced with higher precision than previously reported. The impact of the newly measured bp values on the composition of the type-I X-ray burst ashes was studied.

15 pages, 14 Figures, 4 Tables

References in corpus (7)

• X-ray binaries
• Orbital dependent nucleonic pairing in the lightest known isotopes of tin
• Production and $\beta$ decay of rp-process nuclei ${}^{96}$Cd, ${}^{98}$In and ${}^{100}$Sn
• Mass measurements of very neutron-deficient Mo and Tc isotopes and their impact on rp process nucleosynthesis
• Penning trap mass measurements on (99-109)$Cd with ISOLTRAP and implications on the rp process
• $\beta$-Decay Half-Life of the $rp$-Process Waiting Point Nuclide ${}^{84}$Mo
• High-spin μs isomeric states in 96Ag

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• Isomeric excitation energy for ${}^{99}$In${}^m$ from mass spectrometry reveals constant trend next to doubly magic ${}^{100}$Sn
• $\beta$-particle energy-summing correction for $\beta$-delayed proton emission measurements
• A Novel Method for the Measurement of Half-Lives and Decay Branching Ratios of Exotic Nuclei
• Three-body model for an isoscalar spin-triplet neutron-proton pair in ${}^{102}\mathrm{Sb}$