  It is proposed to use rectangular Raman pulses for the technique of
sequantial large momentum transfer. It is shown that the small parameters that
make it possible to use this technology for precision atom interferometry can
be 40--200 times smaller than in the case of the Bragg regime. It is predicted
that in the case of a non-equidistant timing of auxiliary pulses, one can
observe oscillations in time of the interference picture with a period
inversely proportional to the recoil frequency. Such an observation would be
the first confirmation that Mach-Zehnder atom interference is a phenomenon
caused by the quantization of the atomic center-of-mass motion. This effect is
calculated for any shape of pulses. One can observe it in the Bragg regime as
well. It is proposed to use non-continuous composite Raman pulses as auxiliary
beam splitters so that the effective Rabi frequency remains unchanged for the
entire process. The gravity phase of an atomic interferometer is calculated for
any shape, duration, and timing of Raman pulses, including the Bragg regime.
The phase corrections caused by the finite pulses' durations are also
calculated for rectangular Raman pulses shape.
