Ratio|gAgV|derived from the proton spectrum in free-neutron decay

1978 ◽  
Vol 18 (11) ◽  
pp. 3970-3979 ◽  
Author(s):  
Chr. Stratowa ◽  
R. Dobrozemsky ◽  
P. Weinzierl
Keyword(s):  
Neutron Decay ◽  
Proton Spectrum ◽  
Free Neutron

scholarly journals aCORN: An experiment to measure the electron-antineutrino correlation coefficient in free neutron decay

2017 ◽  
Vol 88 (8) ◽  
pp. 083503 ◽  
Author(s):  
B. Collett ◽  
F. Bateman ◽  
W. K. Bauder ◽  
J. Byrne ◽  
W. A. Byron ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Neutron Decay ◽  
Electron Antineutrino ◽  
Free Neutron

scholarly journals Measurements of the Neutron Lifetime

Atoms ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 70 ◽  
Author(s):  
F. Wietfeldt
Keyword(s):  
Nuclear Physics ◽  
Neutron Decay ◽  
Neutron Lifetime ◽  
The Past ◽  
Free Neutron ◽  
Mean Lifetime ◽  
Fundamental Process ◽  
Beam Method ◽  
The Subject ◽  
Particle Decays

Free neutron decay is a fundamental process in particle and nuclear physics. It is the prototype for nuclear beta decay and other semileptonic weak particle decays. Neutron decay played a key role in the formation of light elements in the early universe. The precise value of the neutron mean lifetime, about 15 min, has been the subject of many experiments over the past 70 years. The two main experimental methods, the beam method and the ultracold neutron storage method, give average values of the neutron lifetime that currently differ by 8.7 s (4 standard deviations), a serious discrepancy. The physics of neutron decay, implications of the neutron lifetime, previous and recent experimental measurements, and prospects for the future are reviewed.

scholarly journals A measurement of the antineutrino asymmetry B in free neutron decay

2005 ◽  
Vol 619 (3-4) ◽  
pp. 263-270 ◽  
Author(s):  
M. Kreuz ◽  
T. Soldner ◽  
S. Baeßler ◽  
B. Brand ◽  
F. Glück ◽  
...  
Keyword(s):  
Neutron Decay ◽  
Free Neutron

scholarly journals Measurement of the transverse polarization of electrons emitted in free neutron decay

2012 ◽  
Vol 85 (4) ◽  
Author(s):  
A. Kozela ◽  
G. Ban ◽  
A. Białek ◽  
K. Bodek ◽  
P. Gorel ◽  
...  
Keyword(s):  
Transverse Polarization ◽  
Neutron Decay ◽  
Free Neutron

New limit on T violation in free neutron decay

2003 ◽  
Vol 721 ◽  
pp. C469-C472 ◽  
Author(s):  
T. Soldner ◽  
L. Beck ◽  
C. Plonka ◽  
K. Schreckenbach ◽  
O. Zimmer
Keyword(s):  
Neutron Decay ◽  
Free Neutron ◽  
T Violation

scholarly journals On the Free Neutron Decay with Neutrino(s) Interactions

2019 ◽  
Author(s):  
Muhammad Ali
Keyword(s):  
Beta Decay ◽  
Cross Sections ◽  
Neutron Decay ◽  
Mathematical Framework ◽  
Neutron Lifetime ◽  
Discrete Energy ◽  
Neutron Beta Decay ◽  
Inverse Beta Decay ◽  
Free Neutron ◽  
Reactor Neutrinos

This paper proposes a mechanism for the decay of free neutron with interactions with neutrino(s). A mathematical framework is developed using canonical ensemble framework for the interactions. Probability distribution of neutron discrete energy states has been derived which is a function of neutrino-zeta – a macroscopic property of neutrinos. Consequently, a relationship between neutron decay constant and probability of neutron beta decay is provided, assuming linear proportionality. Furthermore, qualitative explanation of neutron lifetime puzzle, where discrepancy in lifetime measurements based on measurement method (Bottle vs Beam), is related to neutrino microscopic cross-sections. In addition, inverse beta-decay reaction of proton and beta-negative and beta-positive reaction of radionuclides have been analyzed using the proposed mechanism. The probabilities of beta-negative and beta-positive reactions in nature are qualitatively in agreement with the proposed mechanism. Lastly, way to test the mechanism experimentally with reactor neutrinos and neutrino beams has been presented.

scholarly journals aCORN: Measuring the electron-antineutrino correlation in neutron beta decay

2019 ◽  
Vol 219 ◽  
pp. 04008
Author(s):  
F.E. Wietfeldt ◽  
W.A. Byron ◽  
B. Collett ◽  
G. Darius ◽  
C.R. DeAngelis ◽  
...  
Keyword(s):  
Beta Decay ◽  
Neutron Beam ◽  
Beam Line ◽  
Neutron Decay ◽  
High Flux ◽  
Proton Spectroscopy ◽  
Neutron Beta Decay ◽  
Require Precision ◽  
Electron Antineutrino ◽  
Free Neutron

The aCORN experiment uses a novel asymmetry method to measure the electron-antineutrino correlation (a-coefficient) in free neutron decay that does not require precision proton spectroscopy. aCORN completed two physics runs at the NIST Center for Neutron Research. The first run on the NG-6 beam line obtained the result a = 0.1090 +/- 0.0030 (stat) +/- 0.0028 (sys), the most precise to date. The second run on the new NG-C high flux beam line promises an improvement in precision to ¡ 2%. In addition we show that an improved measurement of the neutrino asymmetry (B-coefficient) can be made using the aCORN apparatus on a highly polarized neutron beam.

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