نتایج جستجو برای: jahn
تعداد نتایج: 1797 فیلتر نتایج به سال:
The sensitivity of polarisation-asymmetry correlation experiments to charged currents of right-handed chirality contributing to allowed β-decay is considered in the most general context possible, independently of any type of approximation nor of any specific model for physics beyond the Standard Model of the electroweak interactions. Results are then particularised to general Left-Right Symmetr...
At forward angles, and bombarding energies E > 200 MeV, the (p, n) and (n, p) reactions are thought to be directly proportional to the Gamow-Teller transition strengths in the nuclei. Assuming that this relationship also holds for charge exchange induced by high-energy heavy ions, it would be very useful in studies with radioactive beams. Contrary to this expectation, we show that the determina...
We present a detailed study of the electronic structure and the stability of C(60) dianions in the gas phase. Monoanions were extracted from a plasma source and converted to dianions by electron transfer in a Na vapor cell. The dianions were then stored in an electrostatic ring, and their near-infrared absorption spectrum was measured by observation of laser induced electron detachment. From th...
By means of diffuse x-ray scattering (DS) and inelastic (IXS), we probe directly the charge-ordering (CO) dynamics in Verwey system $({\mathrm{NaMn}}_{3}){\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$, where a peculiar quadruple perovskite structure with no oxygen disorder stabilizes nearly full ${\mathrm{Mn}}^{3+}$/${\mathrm{Mn}}^{4+}$ static charge order at ${T}_{\mathrm{CO}}=175$ K concomitant to comme...
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