Superradiant MeV γ Scattered by a Room-Temperature Spinor Quantum Fluid
AbstractRecent reports have revealed the rich long-lived Mossbauer phenomenon of 93mNb, in which it has long been speculated that the delocalized 93mNb undergoes Bose-Einstein condensation following an increase in the 93mNb density beyond the threshold of 1012 cm−3 at room temperature. We now report on the superradiant Rayleigh of the M4 γ at 662 keV scattered into end-fire modes along the long axis of the sample, as evidence of Bose-Einstein condensation. We observed the Arago (Poisson’s) spot in order to demonstrate a near-field γ-ray diffraction from a mm-sized γ source, as well as a γ interference beyond the Huygens-Fresnel principle. During the 107-day monitoring period, seven Sisyphus cycles of mode hopping appeared in the superradiance, which demonstrates the optomechanic bistabilty provided by the collective interaction between the spinor quantum fluid and the impinging γs. Condensate-light interaction produces a pm matter-wave grating to become a Fabry-Pérot resonator with a Q-factor on the order of 1020, from which end-fired γs lase. View Full-Text
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Cheng, Y.; Lin, T.-H.; Lee, C.-H.; Wu, S.-C. Superradiant MeV γ Scattered by a Room-Temperature Spinor Quantum Fluid. Crystals 2017, 7, 196.
Cheng Y, Lin T-H, Lee C-H, Wu S-C. Superradiant MeV γ Scattered by a Room-Temperature Spinor Quantum Fluid. Crystals. 2017; 7(7):196.Chicago/Turabian Style
Cheng, Yao; Lin, Ting-Han; Lee, Chih-Hao; Wu, Shun-Chi. 2017. "Superradiant MeV γ Scattered by a Room-Temperature Spinor Quantum Fluid." Crystals 7, no. 7: 196.
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