Next Article in Journal
An Overview of the Top Ten Detergents Used for Membrane Protein Crystallization
Previous Article in Journal
High Power 1443.5 nm Laser with Nd:YAG Single Crystal Fiber
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Crystals 2017, 7(7), 196; doi:10.3390/cryst7070196

Superradiant MeV γ Scattered by a Room-Temperature Spinor Quantum Fluid

1,†,* , 2
,
2,3
and
2,3,*
1
Department of Engineering Physics, Tsinghua University, Haidian, 100084 Beijing, China
2
Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
3
Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
Tsinghua University Beijing abruptly breached the contract of leading Author YC in May 2017, which is pending now.
*
Authors to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Received: 18 May 2017 / Revised: 28 June 2017 / Accepted: 28 June 2017 / Published: 1 July 2017
View Full-Text   |   Download PDF [1704 KB, uploaded 1 July 2017]   |  

Abstract

Recent 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
Keywords: long-lived Mossbauer effect; delocalized nuclear γ excitation; superradiant Rayleigh scattering; photonic crystal; γ laser; spinor quantum fluid; symmetry-protected phase; magnetoelectric effect; topological defects; Majorana fermions long-lived Mossbauer effect; delocalized nuclear γ excitation; superradiant Rayleigh scattering; photonic crystal; γ laser; spinor quantum fluid; symmetry-protected phase; magnetoelectric effect; topological defects; Majorana fermions
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

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.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top