نتایج جستجو برای: neutron decay
تعداد نتایج: 117888 فیلتر نتایج به سال:
One of the most important reactions of the URCA that lead to the cooling of a neutron star, is neutron beta-decay ( ). In this research, the energy spectra and wave functions of massive fermions taking into account the Anomalous Magnetic Moment (AMM) in the presence of a strong changed magnetic field are calculated. For this purpose, the Dirac-Pauli equation for charged and neutral fermions is ...
چکیده ندارد.
The expected increased accuracy of neutron β-decay experiments at the new Spallation Neutron Source could result in more stringent tests of the Standard Model. For an unambiguous search for new physics in neutron decay experiments and for a precise determination of fundamental constants, it is necessarily to understand and evaluate all corrections for neutron decay with higher accuracy than the...
Purpose – The decay of the neutron is well known from the perspective of empirical quantification, but the ontological explanations are lacking for why the neutron should be stable within the nucleus and unstable outside. A theory is developed to explain the reasons for decay of the free neutron and stability of the bonded neutron. Method – The Cordus theory, a type of non-local hidden-variable...
Why is the neutron stable in the nucleus? Why is the free neutron unstable outside the atom? This paper applies the cordus conjecture to address these questions. The proposed explanation is that in the nucleus the discrete field structures (cordus HED) of the proton and neutron fulfil each other, thereby providing a joint stability. When the neutron is removed from the nucleus, its stability be...
The aCoRn collaboration plans to measure the electron-antineutrino correlation coefficient (“little a”) in neutron decay. “a” is the least well known of the neutron decay coefficients. It’s value, when combined with other neutron decay parameters, can be used to determine the weak vector and axial vector coupling constants and to test the validity and self-consistency of the Electroweak Standar...
We measured the neutron decay lifetime by counting in-beam neutron decay recoil protons trapped in a quasi-Penning trap. The absolute neutron beam fluence was measured by capture in a thin (6)LiF foil detector with known efficiency. The combination of these measurements gives the neutron lifetime: τ n = (886.8 ± 1.2 ± 3.2) s, where the first (second) uncertainty is statistical (systematic) in n...
In polarized neutron decay, the angular correlation between the neutron spin and the direction of emission of the electron is characterized by the coefficient A. Measuring A involves determining the forward-backward asymmetry of the decay beta with respect to the direction of the neutron polarization. The value of A, when combined with measurements of the neutron lifetime, determines the values...
Neutron beta decay and the current determination of V ud. Abstract Measurements of neutron beta decay observables required to determine |V ud | are reaching the 0.1% accuracy. In this paper we review the calculation of the decay rate of this process, discuss its relevant uncertainties, and obtain an expression that is precise at the 10 −4 level. Our analysis clearly shows the necessity of more ...
The abBA collaboration proposes to conduct a comprehensive program of precise measurements of neutron β-decay coefficients a (the correlation between the neutrino momentum and the decay electron momentum), b (the electron energy spectral distortion term), A (the correlation between the neutron spin and the decay electron momentum), and B (the correlation between the neutron spin and the decay n...
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