We propose a method for performing material identification from radiographs without energy-resolved measurements. Material has wide variety of applications, including in biomedical imaging, nondestructive testing, and security. While existing techniques radiographic make use dual energy sources, energy-resolving detectors, or additional (e.g., neutron) measurements, such setups are not always p...

Spherical time projection chambers (TPC), also known as spherical proportional counters, are employed in the search for rare phenomena, such light Dark Matter candidates. The TPC exhibits a number of essential features, making it promising candidate neutrinoless double beta decay (??0?). A tonne-scale experiment could cover region parameter space relevant inverted mass hierarchy with few years ...

The most accurate way to measure the energy levels for the O ii 2p 3 ground configuration has been from the forbidden lines in planetary nebulae. We present an analysis of modern planetary nebula data that nicely constrain the splitting within the 2 D term and the separation of this term from the ground 4 S 3/2 level. We extend this method to H ii regions using high-resolution spectroscopy of t...