نتایج جستجو برای: pulse sequence
تعداد نتایج: 491602 فیلتر نتایج به سال:
A long air plasma channel can be formed by filamentation of intense femtosecond laser pulses. However, the lifetime of the plasma channel produced by a single femtosecond laser pulse is too short (only a few nanoseconds) for many potential applications based on the conductivity of the plasma channel. Therefore, prolonging the lifetime of the plasma channel is one of the key challenges in the re...
We describe significantly improved long-distance measurements in biomolecules by use of the new multipulse double electron-electron spin resonance (DEER) illustrated with the example of a five-pulse DEER sequence. In this sequence, an extra pulse at the pump frequency is used compared with standard four-pulse DEER. The position of the extra pulse is fixed relative to the three pulses of the det...
Saturation Recovery The simplest sequence is known as Saturation Recovery in which there is a single 90? pulse and a long repetition time between pulses. If the signal is measured immediately following the pulse the image will depend on the proton density. If the sequence is repeated rapidly (short repetition time, TR) there will be only partial relaxation and the results will depend on proton ...
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