introduction:surgeosight is a dedicated intra-operative hand-held gamma camera designed and manufactured by our team to be used for lymphoscintigraphy. although conventional gamma cameras are widely used, they lack the capability of the sentinel lymph node (sln) imaging in the operation room. like conventional gamma cameras it is necessary to calibrate surgeosight for linearity distortion, ener...

Cryogenic detectors operated at temperatures below 1 K offer an order of magnitude higher energy resolution than conventional semiconductor-based energy-dispersive detectors, and orders of magnitude higher efficiency that grating spectrometers. Initially developed for astrophysics applications, these detectors are increasingly used in synchrotron-based research, both for detector characterizati...

In April 2003, UCLA researchers conducted test run T466 at the Stanford Linear Accelerator Center with their newly designed electromagnetic calorimeter towers composed of tungsten powder and scintillating fibers. The prototype’s energy resolution, uniformity of response, and linearity were measured using an electron beam with a momentum of up to 10 GeV. The measured energy resolution was 17%/ √...

Wavelength-dispersive high-resolution X-ray spectrometers often employ elastically bent crystals for the wavelength analysis. In a preceding paper [Honkanen et al. (2014). J. Synchrotron Rad. 21, 104-110] a theory for quantifying the internal stress of a macroscopically large spherically curved analyser crystal was presented. Here the theory is applied to compensate for the corresponding decrea...

2014 The triply modulated incommensurate phase of berlinite and quartz is imaged by electron microscopy in c-zone axis orientation conditions. The systematic study of the images and of the incommensurate diffraction satellites shows that the apparently triangular dark/light contrast pattern obtained with the transmitted beam or a general hk0-reflection and the surrounding satellites can be expl...

We present a high-resolution analysis of the six electronic states that share the same dissociation limit with the second excited electronic state B in molecular iodine. These six states are coupled to the B state via hyperfine interactions. The four hyperfine parameters, CB, B, dB, and eqQB, are calculated with the available potential energy curves and wave functions constructed from the separ...

We are developing a high-resolution, high-efficiency positron emission tomography (PET) detector module with depth of interaction (DOI) capability based on a lutetium oxyorthosilicate (LSO) scintillator array coupled at both ends to position-sensitive avalanche photodiodes (PSAPDs). In this paper we present the DOI resolution, energy resolution and timing resolution results for complete detecto...

A critical evaluation of the performance of X-ray refinement protocols using various energy functions is presented using the bovine pancreatic trypsin inhibitor (BPTI) protein. The four potential energy functions we explored include: (1) fully quantum mechanical calculations; (2) one based on an incomplete molecular mechanics (MM) energy function employed in the Crystallography and NMR System (...

Aims. The analysis of the high-resolution UVES spectra of the CP stars HR 6000 and 46 Aql has revealed the presence of an impressive number of unidentified lines, in particular in the 5000-5400 Å region. Because numerous 4d-4f transitions of Fe ii lie in this spectral range, and because both stars are iron overabundant, we investigated whether the unidentified lines can be due to Fe ii. Methods...

Total rotational energy transfer rates have been measured at 1330 K for specific rotational levels in the OH A2X +, v' = 0 state in collisions with H20. Rotational levels ranging from N' = 0 to 15 were studied. Measurements were performed in the post-flame region of a stoichiometric H2/O2/He flame operating at 25 mbar. Quenching rates following excitation of individual upper rotational states w...