نتایج جستجو برای: neutron decay

تعداد نتایج: 117888  

2010
T. E. Chupp M. S. Dewey T. R. Gentile H. P. Mumm A. K. Thompson F. E. Wietfeldt K. G. Kiriluk K. J. Coakley

The theory of quantum electrodynamics predicts that the β decay of the neutron into a proton, electron, and antineutrino is accompanied by a continuous spectrum of emitted photons described as inner bremsstrahlung. While this phenomenon has been observed in nuclear β decay and electron-capture decay for many years, it has only been recently observed in free-neutron decay. We present a detailed ...

1996
SUJAN SENGUPTA

The ohmic decay of magnetic fields confined within the crust of neutron stars is considered by incorporating the effect of space-time curvature produced by the intense gravitational field of the star. It is shown that general relativistic effect reduces the magnetic field decay rate substaintially and specially at the late time of the evolution the decay rate decreases by several orders of magn...

1998
SUJAN SENGUPTA

The ohmic decay of magnetic fields confined within the crust of neutron stars is considered by incorporating both the effect of neutron star cooling and the effect of space-time curvature produced by the intense gravitational field of the star. For this purpose a stationary and static gravitational field has been considered with the standard as well as the accelerated cooling models of neutron ...

2000
S. B. Popov

The influence of exponential magnetic field decay (MFD) on the spin evolution of isolated neutron stars is studied. The ROSAT observations of several X-ray sources, which can be accreting old isolated neutron stars, are used to constrain the exponential and power-law decay parameters. We show that for the exponential decay the ranges of minimum value of magnetic moment, μb, and the characterist...

1996
P. MÖLLER

We tabulate the ground-state odd-proton and odd-neutron spins and parities, proton and neutron pairing gaps, binding energy, oneand two-neutron separation energies, quantities related to β-delayed oneand two-neutron emission probabilities, β-decay energy release and half-life with respect to Gamow-Teller decay, oneand two-proton separation energies, and α-decay energy release and half-life for ...

Journal: :International Journal of Modern Physics A 2018

2005
F. E. Wietfeldt C. Trull G. L. Jones B. Collet L. Goldin B. G. Yerozolimsky R. Wilson S. Balashov Yu. Mostovoy A. K. Thompson

The angular correlation between the beta electron and antineutrino in nuclear beta decay is characterized by the dimensionless parameter a. The value of a for free neutron decay, when combined with other neutron decay parameters, can be used to determine the weak vector and axial vector coupling constants gV and gA and test the validity and selfconsistency of the Electroweak Standard Model. Pre...

2008
Jouni Suhonen

The evaluation of the nuclear matrix elements (NME) of the twoneutrino double beta (2νββ) decay and neutrinoless double beta (0νββ) decay using the proton-neutron quasiparticle random-phase approximation (pnQRPA) is addressed. In particular, the extraction of a proper value of the proton-neutron particle-particle interaction parameter, gpp, of this theory is analyzed in detail. Evidence is show...

Journal: :Physical review letters 2013
L V Grigorenko I G Mukha M V Zhukov

The structure and decay of 26O are investigated in a three-body 24O+n+n model suitable for studies of the long-lived (including radioactivity time scale) states. We have found extremely strong effects of the subbarrier configuration mixing on the decay width of true 2n emitters due to core recoil and neutron-neutron final state interaction. This effect far exceeds the analogous effect in the tr...

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