We present a general acceleration algorithm for alternating and monotone scalar sequences and series. The main components of the algomthm are the subroutines WHIZ and HURRY. WHIZ is a recursive implementation of Levin's u transform, and HURRY {which calls WHIZ) estimates truncation and round-off errors to make a near-optimal stopping decision and provide a very good estimate of the accuracy of the computed answer.We also present a test driver program that demonstrates the capabilities of HURRY when applied to a wide varmty of convergent and divergent sequences and series

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Sources of 9.87-min 136 La and 6.82-min 134 La were made by the (p,n) reaction on enriched 136 Ba and 134 Ba. A 20-cc Ge(Li) detector was used to observe the y rays emitted by these sources. The energies in keV (with relative intensities in parentheses) of y rays emitted in the decay of 136