radioactive decay

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Synonyms for radioactive decay

the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation

References in periodicals archive ?
We plot the branching ratios [BR.sub.i] (= [[GAMMA].sub.i]/[[GAMMA].sub.total]) of the respective decay modes ([[GAMMA].sub.i]) with respect to the total decay width ([[GAMMA].sub.total]) of the heavy neutrino into W, Z and Higgs bosons in Figure 1 as a function of the heavy neutrino mass ([m.sub.N]).
The first requirement for the investigation study is to measure the real stepping accuracy at the different decay mode settings.
However, detecting two-neutrino double-beta decay in the laboratory is not an easy feat, since the energies of the emitted particles are comparable to those found in much more common radioactive decay modes from elements such as uranium, which is present in most materials.
Due to the new decay mode, the usual assumption that the BRs into the SM final states (bW, tZ, th) sum to one fails, and the limits have to be reanalyzed.
From the Lagrangian in (1), we have the following two-body decay modes of [PHI], namely, [PHI] [right arrow] xy, where xy = {gg, qq, [gamma][gamma], [gamma]Z, WW, ZZ}.
For the analysis we take into account the [mu][gamma] decay mode of the [[mu].sup.*].
Decay widths of excited spin-3/2 neutrinos for the [v.sup.*] [right arrow] v[gamma] decay mode for the two currents are given by
The [[pi].sup.+] ([[pi].sup.-]) mesons (with a mass of [m.sub.[pi]] = 139.6 MeV/[c.sup.2] and a half-life of 2.6 x [10.sup.-8] s) decay due to the weak interaction, the primary decay mode of which (with a probability of 0.999877) is a reaction leading to an antimuon (muon) and a muonic neutrino (muonic antineutrino) as
The kinematic selection in each [tau] decay mode was based on a set of global variables which described the general properties of the momenta of the candidate [[tau].sub.V] and of the hadronic system H in the laboratory frame.
In the present paper, we show that the suppression of couplings of this boson to the 4th generation quarks and leptons can make compatible the experimental data on the two-photon decay mode of the Higgs boson with this hypothesis.
In the B meson decay into states with an [eta], in the case of B [right arrow] J/[psi][eta]K, since the [eta] meson is described by the u[bar.u], d[bar.d], and s[bar.s] combination, there are two different color-suppressed internal W-emission Feynman diagrams; the [B.sup.0] [right arrow] J/[psi][eta][K.sup.0] decay mode contains s[bar.s] and d[bar.d] pairs while the [B.sup.+] [right arrow] J/[psi][eta][K.sup.+] decay mode includes s[bar.s] and u[bar.u] pairs of the [eta] components.
Because of the large background contribution the results would be better than the semileptonic case; therefore we do not perform the analysis for this decay mode. We consider the center-of-mass energies of 0.5, 1, and 1.5 TeV, and for these energies we analyse two cases, semileptonic and fully hadronic decays of top quark.
The dominant decay mode of [B.sup.*.sub.c] is [B.sup.*.sub.c] [right arrow] [B.sub.c][gamma] [4].
Recently, in the reaction [gamma]p [right arrow] p[phi]([K.sub.S][K.sub.L]), a photoproduction cross-section of the [phi] meson in its neutral decay mode was measured by the CLAS Collaboration.
(In this paper mention of a particular decay mode implies the use of the charge conjugated mode as well.) These measurements are possible at an [e.sup.+][e.sup.-] collider operating at the Y(4S).