  We conduct one dimensional (1D) stellar evolution simulations of non-rotating
stars with initial masses in the range of $11-48 M_\odot$ to the time of core
collapse and, using a criterion on the specific angular momentum fluctuations
in the inner convective zones, estimate the masses of the neutron star (NS)
remnants according to the jittering jets explosion mechanism. From the 1D
simulations we find that several convective zones with specific angular
momentum fluctuations of $j_{conv} > 2.5 \times 10^{15} cm^2 s^{-1}$ develop
near the edge of the iron core in all models. For this condition for explosion
we find the NS remnant masses to be in the range of $1.3 -1.8 M_\odot$, while
if we require twice as large values, i.e., $j_{conv} > 5 \times 10^{15} cm^2
s^{-1}$, we find the NS remnant masses to be in the range of $1.4 - 2.8
M_\odot$ (the upper values here might form black holes). Note that in general
the formation of black holes in the jittering jets explosion mechanism requires
a rapidly rotating pre-collapse core, while we simulate non-rotating stars.
