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Future direct searches for low-mass dark matter particles with germaniumdetectors, such as SuperCDMS SNOLAB, are expected to be limited by backgroundsfrom radioactive isotopes activated by cosmogenic radiation inside thegermanium. There are limited experimental data available to constrainproduction rates and a large spread of theoretical predictions. We examine thecalculation of expected production rates, and analyze data from the second runof the CDMS low ionization threshold experiment (CDMSlite) to estimate therates for several isotopes. We model the measured CDMSlite spectrum and fit forcontributions from tritium and other isotopes. Using the knowledge of thedetector history, these results are converted to cosmogenic production rates atsea level. The production rates in atoms/(kg$\cdot$day) are 74$\pm$9 for $^3$H,1.5$\pm$0.7 for $^{55}$Fe, 17$\pm$5 for $^{65}$Zn, and 30$\pm$18 for $^{68}$Ge.

Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite