Acoustical Spectroscopy Using Optical Masers

Iv. Optical and Infrared Masers

During the past few months, we have been primarily occupied with organization of our group and establishment of the initial experimental facilities. The present report outlines the theoretical and experimental programs that have been started. A series of experiments is under way for testing the ultimate frequency stability of the gaseous optical maser. To this end, the thermal and mechanical ef...

Ultrasound Contrast Agents Optical and Acoustical Characterization

Probing pancreatic disease using tissue optical spectroscopy.

Pancreatic adenocarcinoma, one of the leading causes of cancer death in the United States, has a five-year survival rate of only 4%. Present detection methods do not provide accurate diagnosis in the disease's early stages. To investigate whether optical spectroscopy could potentially aid in early diagnosis and improve survival rates, reflectance and fluorescence spectroscopies were employed fo...

Spectroscopy, Structural, and Optical Investigations of NiFe2O4 Ferrite

Ni ferrite crystalline material is synthesized using a sol-gel method at two different temperatures. The vibrational and stretching modes, crystalline phase, size distribution and morphology of the products are investigated via Raman back-scattering and Fourier transform infrared (FTIR) spectroscopy, XRD and FESEM, respectively. Vibrational modes of spinel ferrite are observed at Raman and FTIR...

Class I methanol masers: Masers with EGOs

We have compared the results of a number of published class I methanol maser surveys with the catalogue of high-mass outflow candidates identified from the GLIMPSE survey (known as extended green objects or EGOs). We find class I methanol masers associated with approximately two-thirds of EGOs. Although the association between outflows and class I methanol masers has long been postulated on the...