Elucidating the nature of the proton radioactivity and branching ratio on the first proton emitter discovered 53mCo.

The observation of a weak proton-emission branch in the decay of the 3174-keV 53mCo isomeric state marked the discovery of proton radioactivity in atomic nuclei in 1970. Here we show, based on the partial half-lives and the decay energies of the possible proton-emission branches, that the exceptionally high angular momentum barriers, [Formula: see text] and [Formula: see text], play a key role in hindering the proton radioactivity from 53mCo, making them very challenging to observe and calculate. Indeed, experiments had to wait decades for significant advances in accelerator facilities and multi-faceted state-of-the-art decay stations to gain full access to all observables. Combining data taken with the TASISpec decay station at the Accelerator Laboratory of the University of Jyväskylä, Finland, and the ACTAR TPC device on LISE3 at GANIL, France, we measured their branching ratios as bp1 = 1.3(1)% and bp2 = 0.025(4)%. These results were compared to cutting-edge shell-model and barrier penetration calculations. This description reproduces the order of magnitude of the branching ratios and partial half-lives, despite their very small spectroscopic factors.

Medicos durante la guerra contra triple alianza 1865-1870 / Physicians during Triple Alliance War 1865-1870 against

Son pocos los datos que se disponen con respecto a la Sanidad Militar que actuó en la guerra contra la triple alianza,algunos de ellos son que el cuerpo médico disponia de un cirujano mayor,tres medicos de primera clase,un farmaceutico(casi todos los extranjeros)y numerosos practicantes paraguayos.Los elementos de curación eran escasos pero la higiene implantado en el ejercito era muy rigurosa,consiguiendose gracias a esto,un estado sanitario relativamente buenolos hospitales de sangre eran improvisados en los campamentos de transpote de heridos y enfermos se realizaban en carretas