Free-Neutron Beta-Decay Half-Life

1972 ◽  
Vol 5 (7) ◽  
pp. 1628-1640 ◽  
Author(s):  
C. J. Christensen ◽  
A. Nielsen ◽  
A. Bahnsen ◽  
W. K. Brown ◽  
B. M. Rustad
Keyword(s):  
Beta Decay ◽  
Half Life ◽  
Neutron Beta Decay ◽  
Free Neutron

scholarly journals New precision measurements of free neutron beta decay with cold neutrons

2014 ◽  
Vol 41 (11) ◽  
pp. 114003 ◽  
Author(s):  
S Baeßler ◽  
J D Bowman ◽  
S Penttilä ◽  
D Počanić
Keyword(s):  
Beta Decay ◽  
Precision Measurements ◽  
Neutron Beta Decay ◽  
Cold Neutrons ◽  
Free Neutron

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.

THE ELECTRON–ANTINEUTRINO ANGULAR CORRELATION IN FREE NEUTRON DECAY

2005 ◽  
Vol 20 (24) ◽  
pp. 1783-1796 ◽  
Author(s):  
F. E. WIETFELDT
Keyword(s):  
Angular Correlation ◽  
Beta Decay ◽  
Semileptonic Decay ◽  
Neutron Beta Decay ◽  
Fundamental Properties ◽  
Electron Antineutrino ◽  
Free Neutron ◽  
The Status ◽  
Theoretical Advantage ◽  
New Generation

Free neutron beta decay is the simplest nuclear beta decay and the prototype charged-current semileptonic decay. It has some theoretical advantage over other nuclear decay systems in that there are no nuclear structure corrections, and it is the only mixed Fermi/Gamow–Teller beta decay for which the relative matrix elements can be directly calculated. The status of the electron–antineutrino angular correlation (a-coefficient) in neutron beta decay and its role in elucidating fundamental properties of the weak interaction are reviewed, with an emphasis on experiments. A new generation of experiments intended to reduce the uncertainty in the a-coefficient to less than 1% is described.

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