Lifetime of the 5p2P1/2 Level of Ionized Strontium

1974 ◽  
Vol 52 (17) ◽  
pp. 1666-1668 ◽  
Author(s):  
F. M. Kelly ◽  
T. K. Koh ◽  
M. S. Mathur
Keyword(s):  
Oscillator Strength ◽  
Ground State ◽  
Polarized Light ◽  
Optical Excitation ◽  
Zero Field ◽  
Level Crossing ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Field Level ◽  
Hanle Effect

The lifetime of the 5p2P1/2 level of Sr+ has been measured using the Hanle effect, or zero field level crossing technique, with optical excitation from the ground state of the ion. Circularly polarized light is used in the excitation and analysis. The ions are produced in a discharge at the mouth of the furnace used to produce a beam of strontium atoms. No foreign gas is used to carry the discharge. The oscillator strength of the 4215 Å, 5s2S1/2–5p2P1/2 transition is discussed.

Lifetime of the 5p2P3/2 Level of Ionized Strontium

1974 ◽  
Vol 52 (15) ◽  
pp. 1438-1442 ◽  
Author(s):  
F. M. Kelly ◽  
T. K. Koh ◽  
M. S. Mathur
Keyword(s):  
Cross Section ◽  
Ground State ◽  
Optical Excitation ◽  
Zero Field ◽  
Neutral Atoms ◽  
Level Crossing ◽  
Field Level ◽  
Hanle Effect ◽  
Effect Technique

The lifetime of the 5p2P3/2 level of Sr+ has been measured using the zero field level crossing (Hanle effect) technique with optical excitation from the ground state of the ion. The ions are produced in a discharge at the mouth of a furnace used to produce a strontium beam. No foreign gas is used to carry the discharge. An alignment depolarization cross section is obtained for collisions between Sr+ ions and Sr neutral atoms. The results are compared with the published ones.

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

Blue Circularly Polarized Luminescent Amorphous Molecules with Single-handed Propeller Chirality Induced by Circularly Polarized Light Irradiation

2021 ◽  
Author(s):  
Zhaoming Zhang ◽  
Takunori Harada ◽  
Adriana Pietropaolo ◽  
Yuting Wang ◽  
Yue Wang ◽  
...  
Keyword(s):  
Polarized Light ◽  
Light Irradiation ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Trigonal Symmetry ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Preferred-handed propeller conformation was induced by circularly polarized light irradiation to three amorphous molecules with trigonal symmetry, and the molecules with induced chirality efficiently exhibited blue circularly polarized luminescence. In...

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