Comprehensive evidence for a narrow

Abstract

We report evidence for the existence of a narrow pp state with a mass of 2.02 GeV/c 2 and a width below 10 MeV/c 2 produced in + p(p) interactions at 20(12) GeV/c in six nal states, proceeding via baryon exchange mechanism, that could be interpreted as a baryonium candidate. The data come from a new analysis of WA56 experiment made with the CERN spectrometer. Our results are based on the study of an unexplored kinematic region of baryon exchange processes, the central production of mesons. An agreement is found between our results and an earlier observation of this state, and an explanation is given why it was not seen in several other experiments.

Iron Pyrite (FeS2) Broad Spectral and Magnetically Responsive Photodetectors

“…Iron pyrite (cubic β -FeS 2 , "fool's gold") is a remarkable semiconductor that has attracted much interest in various green energy fi elds, such as photoelectrochemical and photovoltaic solar cells, [1][2][3] batteries, [ 4 ] photoemission, [ 5 ] and photodiodes, [6][7][8][9] due to its strong light absorption ( α > 10 5 cm −1 for h ν > 1.3 eV), [ 10 ] a suitable bandgap (E g = 0.95 eV) and an adequate minority carrier diffusion length (100-1000 nm), [ 9,11 ] More importantly, earth abundance (Iron is the fourth most abundant element in the earth's crust), low-cost and non-toxicity of FeS 2 nanocrystals make them excellent candidates for developing cost-effective optoelectronic devices instead of inorganic semiconductors that possess non-sustainable elements. However, the low output efficiency of FeS 2 optoelectronic devices limits their broad applications, [ 8,[12][13][14] which has been attributed to the phase impurity or sulfur vacancies in the bulk and at the surface that generate electronic states within the bandgap.…”

Mass measurements in the endpoint region of the rp-process at SHIPTRAP

“…If a circuit with a high quality factor is used, single-ion sensitivity can be obtained. A cryogenic trap system for the FT-ICR detection at SHIPTRAP [26] is presently being commissioned [27].…”