We present a systematic study of both nuclear radii and binding energies in (even) oxygen isotopes from the valley of stability to the neutron drip line. Both charge and matter radii are compared to state-of-the-art ab initio calculations along with binding energy systematics. Experimental matter radii are obtained through a complete evaluation of the available elastic proton scattering data of...

Production cross sections and excitation functions of neutron deficient isotopes of U, Pa and Th have been measured in the reaction of 22 N e+ 208 P b. The comparison of experimental production cross sections of uranium isotopes with the neutron number 126 ≤ N ≤ 134 to the values calculated using statistical model of nuclear deexcitation has been carried out. There is shown, that none of the co...

Introduction The molecular sieving of isotopes has long been considered impossible, as they are of essentially identical size and shape. However, for light isotopes such as H2 and D2, quantum effects can lead to sufficiently large differences in de Broglie wavelengths at cryogenic conditions to make their molecular sieving possible in nanoporous materials having pores of molecular dimension. Wh...

Interspecific interactions are often difficult to elucidate, particularly with large vertebrates at large spatial scales. Here, we describe a methodology for estimating interspecific interactions by combining stable isotopes with bioenergetics. We illustrate this approach by modeling the population dynamics and species interactions of a suite of vertebrates on Santa Cruz Island, California, USA...

Oxygen and hydrogen isotopes in snow were measured in weekly profiles during the growth and decline of a sloped subalpine snowpack, southern Idaho, 2011–2012. Isotopic steps (10‰, δO; 80‰, δD) were preserved relative to physical markers throughout the season, albeit with some diffusive smoothing. Melting stripped off upper layers without shifting isotopes within the snowpack. Meltwater is in is...

Hyperfine quenching rates of the lowest-energy metastable P0 and P2 states of Mg, Ca, Sr, and Yb atoms are computed. The calculations are carried out using ab initio relativistic many-body methods. The computed lifetimes may be useful for designing novel ultraprecise optical clocks and trapping experiments with the P2 fermionic isotopes. The resulting natural widths of the P0 S0 clock transitio...

Copper (Cu) is a transition metal and an essential micronutrient for organisms, but also one of the most widespread toxic inorganic contaminants at very high content. The research on Cu isotopes has grown rapidly in the last decade. Hitherto, a large number of studies have been published on the theoretical fractionation mechanisms, experimental data and natural variations of Cu isotopes in vari...

Using xenon as a fill gas in IFE chambers results in generating a large amount of radioactive xenon, iodine, and cesium isotopes. The cesium isotopes, Cs and Cs, and the iodine isotope, I, would produce a high level of off-site dose (62.13 rem) at the plant site boundary if they were released entirely to the environment during an accident. The xenon gas is pumped out of the chamber (recycled) d...

Beta-decay gross properties of neutron-rich isotopes 104 Y and Tc produced in 25 MeV proton-induced fission of U have been measured. Decays of 104 Y with a half-life of 180"60 ms and of Tc with a half-life of 150"30 ms are 112,113,114 Ž . reported for the first time. Beta-delayed neutron emission probabilities of Tc are determined as 1.5"0.2 %, Ž . Ž . 2.1"0.3 % and 1.3"0.4 %, respectively. Com...

The giant monopole resonance (GMR) has been investigated in the even-A Cd and Pb isotopes 112−124Cd, and 204−208Pb, with the aim of obtaining a confirmatory “experimental” value for the asymmetry term in nuclear incompressibility, Kτ , and to test the Mutual Enhancement Magicity (MEM) effect in nuclear incompressibilities. The latter was advanced as a possible explanation of the puzzling “softn...