Phys.Rev. C 103, 025811 (2021)

C.Izzo, J.Bergmann, K.A.Dietrich, E.Dunling, D.Fusco, A.Jacobs, B.Kootte, G.Kripko-Koncz, Y.Lan, E.Leistenschneider, E.M.Lykiardopoulou, I.Mukul, S.F.Paul, M.P.Reiter, J.L.Tracy, C.Andreoiu, T.Brunner, T.Dickel, J.Dilling, I.Dillmann, G.Gwinner, D.Lascar, K.G.Leach, W.R.Plass, C.Scheidenberger, M.E.Wieser, A.A.Kwiatkowski

Mass measurements of neutron-rich indium isotopes for r-process studies

ATOMIC MASSES ^{125,126,127,127m,128,128m,129,129m,130,130m,131,131m,132,133,133m,134}In; measured time-of-flight spectra using TITAN multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) at ISAC-TRIUMF facility; deduced mass excesses. ^{127m,128m,129m,130m,131m,133m}In; deduced excitation energies of two isomeric states each in ¹²⁷In, ¹²⁸In, ¹²⁹In, and ¹³¹In, and one isomeric state each in ¹³⁰In and ¹³²In. Comparison with recent measurements, evaluated data in AME-2016 and ENSDF database, and with predictions from theoretical mass models: FRDM2012, HFB-24, WS4, KTUY05, and DZ95. Radioactive indium beams produced in UC_x(p, X), E=480 MeV reaction, followed by selective ionization using an ion-guide laser ion source (IG-LIS), and mass separated by ISAC mass separator, and finally sent to MR-TOF-MS system consisting of a helium-filled rf transport system and injection trap, an electrostatic time-of-flight mass analyzer, and a MagneTOF detector. ^128,128mIn, ^128,128mSn, ¹²⁸Sb, ¹²⁸Cs, ¹²⁸I, ¹²⁸Te, ¹²⁸Xe; measured mass spectrum for A=128 nuclei. Systematics of energies of 1/2- isomers in ^{101,103,105,107,109,111,113,115,117,119,121,123,125,127,129,131,133}In. Relevance to future r-process calculations, including the effect of isomers.

doi: 10.1103/PhysRevC.103.025811