Science News
The world's fourth country
An Indian spacecraft has become the first to land near the Moon’s rock- and crater-strewn south pole, making the country the world’s fourth to successfully perform a controlled landing on the body.
In the case of the atomic nucleus, one such approach is to investigate isotopes that have very different neutron-to-proton (N/Z) ratios than in stable nuclei. Light, neutron-rich isotopes exhibit the most asymmetric N/Z ratios and those lying beyond the limits of binding, which undergo spontaneous neutron emission and exist only as very short-lived resonances (about 10−21 s), provide the most stringent tests of modern nuclear-structure theories. Here we report on the first observation of 28O and 27O through their decay into 24O and four and three neutrons, respectively.
120 band pass filters in the range of 830–910 nm were formed on a quartz substrate by plasma-enhanced chemical vapor deposition and photolithography. Each band pass consists of one vertical pair of DBR separated with a Si cavity layer, performing as a Fabry–Perot filter.
We demonstrate whole-slide, speckle-free imaging in ~3 min per discrete wavelength at 10× magnification (2 μm/pixel) and high-resolution capability with its 20× counterpart (1 μm/pixel), both offering spatial quality at theoretical limits while maintaining high signal-to-noise ratios (>100:1).