منابع مشابه
Bragg spectroscopy of a Bose-Einstein condensate
The first evidence for Bose-Einstein condensation in dilute gases was obtained by a sudden narrowing of the velocity distribution as observed for ballistically expanding clouds of atoms. However, the dominant contribution to the observed momentum distribution of the expanding condensate was the released interaction energy (mean-field energy) resulting in momentum distributions much broader than...
متن کاملMomentum-Resolved Bragg Spectroscopy in Optical Lattices
Strongly correlated many-body systems show various exciting phenomena in condensed matter physics such as high-temperature superconductivity and colossal magnetoresistance. Recently, strongly correlated phases could also be studied in ultracold quantum gases possessing analogies to solid-state physics, but moreover exhibiting new systems such as Fermi-Bose mixtures and magnetic quantum phases w...
متن کاملBragg curve measurements of 12C and 56Fe in aluminum
Several experiments for measuring depth-dose distribution of charged particles in water have been performed in the last decades because of their high relevance in ion therapy applications. Thus, the combination of energy and charge have been focused on feasible candidates for treatment of cancer with radiation. However, the request of Bragg curve measurements for higher energy and targets other...
متن کاملPhoton Counting for Bragg Spectroscopy of Quantum Gases
We demonstrate a photon-counting technique for detecting Bragg excitation of an ultracold gas of atoms. By measuring the response of the light field to the atoms, we derive a signal independent of traditional time-of-flight atom-imaging techniques. With heterodyne detection we achieve photon shot-noise limited detection of the amplification or depletion of one of the Bragg laser beams. Photon c...
متن کاملTime-resolved photoacoustic spectroscopy using fiber Bragg grating acoustic transducers
An acoustic transducer based on a fiber Bragg grating (FBG) is presented and characterized for use in time-resolved laser-induced photoacoustic spectroscopy (PAS) on solid samples. The photoacoustic wave was generated by pulsed laser excitation of immobilized carbon black or erbium oxide powder, and detected by recording either the transmission or reflection spectrum of a clamped fiber Bragg gr...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research
سال: 1982
ISSN: 0167-5087
DOI: 10.1016/0029-554x(82)90612-7