Solstice

Sparse Days and ANR SOLSTICE

Design Considerations for a New Solid-State Gamma-Camera: SOLSTICE

This paper presents an alternative to conventional gamma camera. The proposed system is based on the combination of a new detection material – CZT and a new acquisition geometry – 1D detector with slat collimator. The slat collimator offers a better compromise to the usual sensitivity-resolution tradeoff. Solid-state detection offers significantly improved energy resolution. The combination of ...

Water vapor map of Mars near summer solstice using ground-based infrared spectroscopy

Ground-based spatial mapping of Mars provides a unique way to retrieve the global distribution of minor atmospheric species and to study transient phenomena or possible variations with the local hour. We have obtained an instantaneous map of water vapor on Mars near summer solstice (Ls = 80◦) using the Texas Echelon Cross Echelle Spectrograph (TEXES) at the NASA Infrared Telescope Facility (IRT...

Performance Evaluation of a New CZT Detector for Nuclear Medicine: SOLSTICE

Solstice is a new concept of gamma camera designed to use the better energy resolution typically available in solid-state detectors. To that purpose, an array of 88 Cadmium Zinc Telluride (CdZnTe or CZT) crystals was characterized for gamma ray detection performance. The bias voltage was applied to the single electrode cathode side of the crystal (radiation side). The anode side of the individu...

Meridional variations of temperature, C2H2 and C2H6 abundances in Saturn’s stratosphere at southern summer solstice

Measurements of the vertical and latitudinal variations of temperature and C2H2 and C2H6 abundances in the stratosphere of Saturn can be used as stringent constraints on seasonal climate models, photochemical models, and dynamics. The summertime photochemical loss timescale for C2H6 in Saturn’s middle and lower stratosphere (∼40–10,000 years, depending on altitude and latitude) is much greater ...