Physics Gifts

- Art Gallery -

The Reactor Experiment for Neutrino Oscillation (RENO) is a short baseline reactor neutrino oscillation experiment in South Korea. The experiment was designed to either measure or set a limit on the neutrino mixing matrix parameter θ13, a parameter responsible for oscillations of electron neutrinos into other neutrino flavours. RENO has two identical detectors, placed at distances of 294 m and 1383 m, that observe electron antineutrinos produced by six reactors at the Hanbit Nuclear Power Plant (the old name: the Yeonggwang Nuclear Power Plant) in Korea.

Each detector consists of 16.5 t of gadolinium-doped liquid scintillator (LAB), surrounded by an additional 450 tons of buffer, veto,and shielding liquids.[1]:6

On 3 April 2012, with some corrections on 8 April, the RENO collaboration announced a 4.9σ observation of θ13 ≠ 0, with

\( {\displaystyle \sin ^{2}2\theta _{13}=0.113\pm 0.013({\rm {stat.}})\pm 0.019({\rm {syst.}})} \)[2][3]

This measurement confirmed a similar result announced by the Daya Bay Experiment three weeks before and is consistent with earlier, but less significant results by T2K, MINOS and Double Chooz.

RENO released updated results[4] in December 2013, confirming θ13 ≠ 0 with a significance of 6.3σ:

\( {\displaystyle \sin ^{2}2\theta _{13}=0.100\pm 0.010({\rm {stat.}})\pm 0.015({\rm {syst.}})} \)

In 2014, RENO announced the observation of an unexpectedly large number of neutrinos with an energy of 5±1 MeV.[5]:14–15 This has since been confirmed by the Daya Bay and Double Chooz experiments,[1]:14–17 and the cause remains an outstanding puzzle.

Expansion plans, referred to as RENO-50, will add a third medium-baseline detector at a distance of 47 km. This distance is better for observing neutrino oscillations, but requires a much larger detector due to the smaller neutrino flux. The location, near Dongshin University, has a 450 m high mountain (Mt. Guemseong), which will provide 900 m.w.e. shielding for the detector. If funded, this will contain 18000 t of scintillator,[1]:31 surrounded by 15000 photomultiplier tubes.
References

Joo, Kyung Kwang (5 July 2016). Results from RENO and prospects with RENO-50. XXVII International Conference on Neutrino Physics and Astrophysics. London. Video available at Neutrino Conference 2016 - Tuesday (part 1) on YouTube.
RENO Collaboration (2012-04-03). "Observation of electron-antineutrino disappearance at RENO". Physical Review Letters. 108 (18): 191802. arXiv:1204.0626. Bibcode:2012PhRvL.108s1802A. doi:10.1103/PhysRevLett.108.191802. PMID 23003027.
RENO Collaboration (2012-04-04). "Announcement of the First Results from RENO: Observation of the Weakest Neutrino Transformation". Interactions NewsWire.
Seon-Hee Seo (for the RENO Collaboration) (2013). "New Results from RENO". arXiv:1312.4111 [physics.ins-det].

Seo, Seon-Hee (3 June 2014). New Results from RENO. XXVI International Conference on Neutrino Physics and Astrophysics. Boston.

vte

Neutrino detectors, experiments, and facilities
Discoveries

Cowan–Reines ( ν e) Lederman–Schwartz–Steinberger ( ν μ) DONUT ( ν τ) Neutrino oscillation SN 1987 neutrino burst

Operating
(divided by
primary
neutrino
source)
Astronomical

ANITA ANTARES ASD BDUNT Borexino BUST HALO IceCube LVD NEVOD SAGE Super-Kamiokande SNEWS

Reactor

Daya Bay Double Chooz KamLAND RENO STEREO

Accelerator

ANNIE ICARUS (Fermilab) MicroBooNE MINERνA MiniBooNE NA61/SHINE NOνA NuMI T2K

0νββ

AMoRE COBRA CUORE EXO GERDA KamLAND-Zen MAJORANA NEXT PandaX SNO+ XMASS

Other

KATRIN WITCH

Construction

ARA ARIANNA Baikal-GVD BEST DUNE Hyper-Kamiokande JUNO KM3NeT SuperNEMO FASERν

Retired

AMANDA CDHS Chooz CNGS Cuoricino DONUT ERPM GALLEX Gargamelle GNO Heidelberg-Moscow Homestake ICARUS IGEX IMB K2K Kamiokande KARMEN KGF LSND MACRO MINOS MINOS+ NARC NEMO OPERA RICE SciBooNE SNO Soudan 2 Utah

Proposed

CUPID GRAND INO LAGUNA LEGEND LENA Neutrino Factory nEXO Nucifer SBND UNO JEM-EUSO WATCHMAN

Cancelled

DUMAND Project Long Baseline Neutrino Experiment NEMO Project NESTOR Project SOX BOREX

See also

BNO (Baksan or Baxan Neutrino Observatory) Kamioka Observatory LNGS SNOLAB List of neutrino experiments

Physics Encyclopedia

World

Index

Hellenica World - Scientific Library

Retrieved from "http://en.wikipedia.org/"
All text is available under the terms of the GNU Free Documentation License