Gamma-Ray spectroscopy in the vicinity of Zr-108

F. Browne et al.; 4 págs.; 2 figs.; Presented at the Zakopane Conference on Nuclear Physics “Extremes of the Nuclear Landscape”, Zakopane, Poland, August 31–September 7, 2014; PACS numbers: 21.10.Re, 21.10.Tg, 23.20.Js, 27.60.+jThe half-lives of 2+121+ states were measured for 102,104102,104Zr and 106,108106,108Mo to test a new implementation of a LaBr33(Ce) array at the RIBF, RIKEN, Japan. The nuclei of interest were produced through the fission of a 345~MeV/nucleon 238238U beam and selected by the BigRIPS separator. Fission fragments were implanted into the WAS3ABi active stopper, surrounding which, 18 LaBr33(Ce) detectors provided fast γγ-ray detection. Timing between the LaBr33(Ce) array and plastic scintillators allowed for the measurement of half-lives of low-lying states. The preliminary results, which agree with literature values, are presented along with experimental details.This work was supported in part by the UK STFC, the UK NMO and D.O.E. grant No. DE-FG02-91ER-40609Peer Reviewe

Developmental temperature affects the expression of ejaculatory traits and the outcome of sperm competition in Callosobruchus maculatus

The outcome of post-copulatory sexual selection is determined by a complex set of interactions between the primary reproductive traits of two or more males and their interactions with the reproductive traits of the female. Recently, a number of studies have shown the primary reproductive traits of both males and females express phenotypic plasticity in response to the thermal environment experienced during ontogeny. However, how plasticity in these traits affects the dynamics of sperm competition remains largely unknown. Here, we demonstrate plasticity in testes size, sperm size and sperm number in response to developmental temperature in the bruchid beetle Callosobruchus maculatus. Males reared at the highest temperature eclosed at the smallest body size and had the smallest absolute and relative testes size. Males reared at both the high- and low-temperature extremes produced both fewer and smaller sperm than males reared at intermediate temperatures. In the absence of sperm competition, developmental temperature had no effect on male fertility. However, under conditions of sperm competition, males reared at either temperature extreme were less competitive in terms of sperm offence (P2), whereas those reared at the lowest temperature were less competitive in terms of sperm defence (P1). This suggests the developmental pathways that regulate the phenotypic expression of these ejaculatory traits are subject to both natural and sexual selection: natural selection in the pre-ejaculatory environment and sexual selection in the post-ejaculatory environment. In nature, thermal heterogeneity during development is commonplace. Therefore, we suggest the interplay between ecology and development represents an important, yet hitherto underestimated component of male fitness via post-copulatory sexual selection

New Proton radioactivity measurements

A series of experiments were carried out at Argonne National Laboratory to search for examples of proton emission from ground and low­lying states in odd­Z nuclei at the proton drip­line. Recoils from fusion evaporation reactions were separated from other reaction products and dispersed according to their mass to charge ratio by the Fragment Mass Analyser, before being implanted into a double­sided silicon strip detector system, where their subsequent particle decays (proton or alpha) were measured. Proton emission from 157 Ta was measured for the first time, with a proton energy of 927 +/- 7 keV and a half­life 10.1 +/- 0.4 ms, This was assigned to a 3.4 +/- 1.2 % proton branch from the s 1/2 ground state on the basis of comparisons of measured half­lives with those calculated using barrier penetration codes. Two new proton lines were observed from the s 1/2 ground state and h 11/2 state in 161 Re, with energies of 1192 +/- 6 keV and 1315 +/- 7 keV and half­lives of 0.37 +/- 0.04 ms and 16 +/- 1 ms, respectively. The proton branching ratios from these states were measured at 100 +/- 7 % and 4.8 +/- 0.6 %, respectively. New proton lines were also measured from states in 171 Au and 167 Ir. Proton radioactivity from the ground state of the deformed nucleus 141 Ho was measured with an energy of 1169 +/- 8 keV and a half­life of 4.2 +/- 0.4 ms and was assigned to the 7/2- [532] Nilsson orbital on the basis of proton decay rate calculated using a deformed model of the nucleus. Recent theoretical calculations which incorporate the above results, are presen­ ted and discussed, along with a new model for calculating spectroscopic factors for spherical nuclei in the region 65 < Z < 81. The effect of a large deformation on proton decay rates is discussed with reference to 141 Ho

Role of graphic design in correlation with industrial design - product

Design as a process can take many forms depending on the subject being designed and the individual or individuals involved. In the context of applied arts, engineering, architecture and other creative activities, design is both a noun and a verb. Design in its verbal context is the process of creating and developing a plan for an aesthetic and functional subject, which requires appropriate research, thinking, modeling, customization and redesign. As a noun, design is also used as a final plan of action (drawing, model or other description), or the result of following that plan of action. The interrelationship between graphic and industrial design is unbreakable, ie graphic design is a function of industrial design when it comes to industrially produced objects. Graphic design clarifies the image of industrial design