Zero‐field level crossing and optical radio‐frequency double resonance studies of the A 2Σ+ states of OH and OD

1973 ◽  
Vol 58 (10) ◽  
pp. 4304-4318 ◽  
Author(s):  
K. R. German ◽  
T. H. Bergeman ◽  
E. M. Weinstock ◽  
R. N. Zare
Keyword(s):  
Radio Frequency ◽  
Double Resonance ◽  
Zero Field ◽  
Level Crossing ◽  
Field Level

The line shape of a zero‐field level‐crossing effect in methyl fluoride

1983 ◽  
Vol 78 (6) ◽  
pp. 3476-3482 ◽  
Author(s):  
S. T. Sandholm ◽  
R. H. Schwendeman
Keyword(s):  
Line Shape ◽  
Zero Field ◽  
Level Crossing ◽  
Methyl Fluoride ◽  
Field Level

Zero-Field Level Crossing in the Helium Atom

1972 ◽  
Vol 50 (2) ◽  
pp. 116-118 ◽  
Author(s):  
C. W. T. Chien ◽  
R. E. Bardsley ◽  
F. W. Dalby
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Helium Atom ◽  
Cross Sections ◽  
Zero Field ◽  
Level Crossing ◽  
Field Level ◽  
Collision Cross Sections ◽  
The Magnetic Field

Zero-field level-crossing techniques have been used to measure some upper-state lifetimes of the helium atom. The half-widths of curves obtained by plotting the polarization against the magnetic field strength for the n1D–21D transitions yielded lifetimes of 2.03 × 10−8 s for the 31D state, 3.36 × 10−8 s for the 41D state, and 7.44 × 10−8 s for the 51D state. Collision cross sections for these 1D levels were also determined.

Double Resonance Detection Using Zero Field Level Crossing

1998 ◽  
Vol 53 (6-7) ◽  
pp. 301-304
Author(s):  
David Stephenson ◽  
John A. S. Smith
Keyword(s):  
High Frequency ◽  
Asymmetry Parameter ◽  
Double Resonance ◽  
Zero Field ◽  
Level Crossing ◽  
Small Magnetic Field ◽  
Crossing Experiment ◽  
Quadrupole Resonance ◽  
Simple Variation ◽  
Resonance Detection

Abstract Double resonance level crossing detection cannot normally be used to record transitions between the quadrupole Zeeman levels. Neither can it be used if the quadrupole resonance frequency is larger than the proton NMR frequency in high field. A simple variation of the level crossing experiment is demonstrated which allows energy to be efficiently transferred from quadrupole to proton system and hence lead to detection in these two cases. In the case of the quadrupole Zeeman levels it allows transitions between the ±½ levels to be detected in a small magnetic field, allowing measurement of the asymmetry parameter (ƞ) for spin 3/2 systems. This is demonstrated for the 11B nucleus in triethanolamine borate. Detection of high frequency quadrupole transitions is demonstrated from which relaxation information is obtained.

Polarisation properties of the stimulated zero-field level crossing

1988 ◽  
Vol 38 (4) ◽  
pp. 550-553 ◽  
Author(s):  
P Jungner ◽  
B Ståhlberg ◽  
M Lindberg
Keyword(s):  
Zero Field ◽  
Level Crossing ◽  
Field Level

Lifetimes of some triplet levels of neutral strontium

1976 ◽  
Vol 54 (7) ◽  
pp. 800-804 ◽  
Author(s):  
F. M. Kelly ◽  
M. S. Mathur
Keyword(s):  
Oscillator Strengths ◽  
Zero Field ◽  
Level Crossing ◽  
Field Level

The zero-field level-crossing technique has been used to determine the lifetimes of the 5p2 3P2,1 and 4d2 3P levels of neutral strontium. The results are compared with those given in the literature and calculated from the available values of oscillator strengths. We have determined the following lifetimes: τ(5p2 3P2) = 6.39 ± 0.20 ns; τ(5p2 3P1) = 6.91 ± 0.20 ns; τ(4d2 3P) = 6.74 ± 0.15 ns.

Fluorescence and zero‐field level crossing spectroscopy of theC2Σ+state of NS

1974 ◽  
Vol 61 (4) ◽  
pp. 1475-1479 ◽  
Author(s):  
Stuart J. Silvers ◽  
Chi‐Lian Chiu
Keyword(s):  
Zero Field ◽  
Level Crossing ◽  
Field Level

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.

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