Search results for "Bars"
showing 10 items of 106 documents
Kościół dla wybranych? O specyfice indyjskich chrześcijan knānāya
2015
Nazwą knānāya (także „południowcy”) określa się jedno z ramion indyjskiego chrześcijaństwa, którego członkowie doszukują się swojej genezy w starożytnej emigracji perskich chrześcijan, przybyłych do Indii pod przewodnictwem kupca Tomasza z Kany. Charakterystyczną cechą tej grupy jest silne przywiązanie do tradycji i bezwarunkowa ochrona tożsamości łączącej współczesnych „południowców” z ich przodkami. Sam fakt głębokiego przywiązania do tradycji i w konsekwencji jej silna ochrona nie powinien dziwić, wszak jest to jedno z podstawowych praw każdej wspólnoty i każdego człowieka. Jednakże knanaici, chcąc zachować „czystość krwi”, zupełnie nie dopuszczają do siebie niczego i nikogo z zewnątrz. …
Differences in ozone sensitivity in three varieties of cabbage (Brassica oleracea L.) in the rural Mediterranean area
2002
Summary The effects of air quality with three levels of ozone (O 3 ) were studied on three cabbage varieties during a one month exposure period in the Valencia area by means of modulated chlorophyll (Chl) a fluorescence, lipid peroxidation and solute leakage. Increasing O 3 exposure reduced the maximum quantum yield of PSII photochemistry (F v /F m ) in line with a reduction in non-cyclic electron flow (ϕ PSII ), lower capacity to reduce the quinone pool (q P ) and a decrease in the potential phothosynthetic quantum conversion, Rfd ratio. These reductions were more evident in Caramba and Sentinel varieties but lower in Othelo. Ozone and its oxidative derivates weakened the plasmalemma, whic…
Beta decay of the new isotope101Sn
1995
The very neutron-deficient isotope 101Sn was produced in a 50Cr(58Ni, 2p5n) reaction and its decay properties were determined for the first time. By using chemically selective ion sources of an on-line mass separator, the energy spectrum and the half-life (3 ± 1 s) of beta-delayed protons of 101Sn were measured. These results are compared to theoretical predictions.
Competition Between Beta and Double Beta Decay in 48Ca and 96Zr
2000
Highly forbidden beta decays of 48Ca and 96Zr are studied and their relative importance as compared to the double beta decay of these nuclei is evaluated. 48Ca and 96Zr are the only naturally occurring nuclei in which these processes can occur simultaneously. Although usually ordinary beta decay overwhelms double beta decay unless the former is energetically forbidden, in these cases the high degree of forbiddenness and small release of kinetic energy makes the half-lives of these modes comparable to each other.
Neutrino mass, neutrinoless double electron capture and rare beta decays
2010
We present results of our theoretical calculations on three nuclei of interest from the neutrino-physics point of view: Firstly, we present the second-forbidden decay branch of 115In with the ultra-low Q value and theoretical open questions related to such decays. Secondly, we have calculated estimates for the half-lives of the single-beta decay channels of 96Zr and concluded that the possible contamination from those to the geochemical measurements of 96Zr double-beta-decay half-life is rather small. Thirdly, we have taken a look at the neutrinoless resonance double-electron-capture decay of 112Sn in the light of recent JYFLTRAP Q value measurements and discovered that the badly fulfilled …
Physics of nuclear processes triggered by the interplay of strong and weak interactions
2012
Neutrinoless double beta (0νββ) decay of nuclei is a process that requires the neutrino to be a massive Majorana particle and thus cannot proceed in the standard model of electro-weak interactions. Recent results of the neutrino-oscillation experiments have produced accurate information on the mixing of neutrinos and their squared mass differences. The 0νββ decay takes place in atomic nuclei where it can be observed, at least in principle, by underground neutrino experiments. The information about the weak-interaction observables, like the neutrino mass, has to be filtered from the data through the nuclear matrix elements (NMEs). In this article recent work of the Jyv¨askyl¨a group on the N…
Beta decay of 108Mo and of neighbouring even Mo-isotopes
1995
Abstract A combination of the proton-induced fission of 238 U and the on-line mass separation based on the ion-guide technique has been applied in the study of neutron-rich Mo-isotopes. The decays of 106,108 Mo have been studied by using gamma-, beta-, X-ray and conversion-electron spectroscopy. The decay scheme of 106 Mo has been revised and a beta-decay half-life of 8.73(12) s has been measured for this nucleus. A beta-decay half-life of 1.09(2) s and a decay energy of 5120(40) keV have been measured for 108 Mo. The decay scheme of 108 Mo has been constructed and altogether 29 new transitions have been placed in the decay scheme. The beta-decay strengths of 102,104,106,108 Mo have been de…
Is the single-state dominance realized in double-β-decay transitions?
1998
In the single-state-dominance hypothesis (SSDH) the decay rate of the two-neutrino double-\ensuremath{\beta} decay to the final ground state is solely determined by virtual single-\ensuremath{\beta}-decay transitions via the ${1}^{+}$ ground state of the intermediate nucleus. A very important consequence the SSDH will be that some of nonaccelerator measurements of double-\ensuremath{\beta}-decay observables could be circumvented by single-\ensuremath{\beta}-decay measurements. To assess the validity of the SSDH, we have carried out a theoretical analysis of all double-\ensuremath{\beta}-decay transitions where the spin-parity of the ground-state of the intermediate nucleus is ${1}^{+}$. The…
The $\beta$-delayed one- and two-proton emission of $^{27}$S
2001
In an experiment performed at the GANIL LISE3 facility, radioactive 27S isotopes have been produced by projectile fragmentation of a 95 AMeV 36Ar primary beam. After selection by means of the LISE3 separator, the isotope of interest was implanted in a silicon-detector telescope where its half-life ( T 1/2 = 15.5(15) ms) and its main decay branches were measured.
Decay properties of neutron deficient Kr isotopes
1974
The decay properties of the neutron deficient isotopes73–77Kr and73–76Br have been studied at the ISOLDE facility at CERN. The total decay energiesQ, as determined fromβ + singles orβ + -γ coincidence measurements, are compared with mass formulae.