The Mössbauer-Effect o f the 104 keV Transition in 180W

1971 ◽  
Vol 26 (6) ◽  
pp. 1088 ◽  
Author(s):  
K. Zioutas ◽  
B. Wolbeck
Keyword(s):  
Absorption Line ◽  
Mössbauer Effect ◽  
Resonance Absorption ◽  
Fast Neutrons ◽  
Mossbauer Effect ◽  
Lifetime Measurements ◽  
Resonance Absorption Line

Abstract The Mössbauer effect of the 2 + (104 keV)0+ transition in 180W has been observed. The source was 180Ta which was produced by irradiation of a foil of natural tantalum by fast neutrons: 181Ta(n, 2n) 180Ta. The width of the resonance absorption line was (3 .1 ± 0.8) mm/sec which corresponds to the linewidth derived from lifetime measurements.

The Mößbauer Effect of the 129 keV Transition in 195Pt

1970 ◽  
Vol 25 (12) ◽  
pp. 1779-1780 ◽  
Author(s):  
B. Wolbeck ◽  
K . Zioutas
Keyword(s):  
Absorption Line ◽  
Line Width ◽  
Mössbauer Effect ◽  
Branching Ratio ◽  
Resonance Absorption ◽  
Mossbauer Effect ◽  
Natural Line Width ◽  
Resonance Absorption Line ◽  
I 31

Abstract The Mößbauer effect of the 129 keV transition in 195Pt has been observed. By use of a Ge(Li) detector any contribution from the strong 99 keV Mößbauer line could be eliminated. The width of the resonance absorption line corresponds to the natural line width. We derived from the magnitude of the observed Mößbauer effect the branching ratio in the decay of the 129 keV level as I (129)/I (31) = ( 5.7 ± 1.6)% .

THE POSSIBILITY OF USING THE MÖSSBAUER EFFECT TO MEASURE CROSS RELAXATION OF 57Co COUPLED TO AN UNPAIRED ELECTRON SPIN

1965 ◽  
Vol 43 (10) ◽  
pp. 1843-1852 ◽  
Author(s):  
Sushil K. Misra ◽  
J. M. Daniels
Keyword(s):  
Emission Line ◽  
Absorption Line ◽  
Unpaired Electron ◽  
Mössbauer Effect ◽  
Numerical Evaluation ◽  
Nuclear Orientation ◽  
Mossbauer Effect ◽  
Flip Flop ◽  
Overhauser Effect

A parameter R(v), relevant to velocity-sensitive Mössbauer spectroscopy, has been computed for the case where the orientation of 57Co nuclei is produced dynamically by the Overhauser effect. This particular pumping scheme for producing nuclear orientation brings out two features. (1) It allows the determination of η, the ratio of flip-flop to flip-flip thermal relaxations, by an experimental measurement of R(v), since the theoretical expressions for R(v) are found to be quite sensitive to the value of η. A numerical evaluation for three cases of overlap between absorber and emitter lines indicates wide variation in R(v) for increasing values of η from 10−7 to 107: for case (a), R(v) increases monotonically from 8.5 × 10−7 to 1.07 × 106 when emission line 3/2 → 1/2 overlaps absorption line −1/2 → −3/2; for case (b), R(v) decreases monotonically from 1.34 × 1014 to 8.91 × 10−5 when emission line −1/2 → 1/2 overlaps absorption line −1/2 → 1/2; and for case (c), R(v) decreases monotonically from 1.62 × 102 to 6.14 × 10−3 when source lines −1/2 → −1/2, 1/2 → −1/2, 1/2 → 1/2, and 3/2 → 1/2 overlap absorber lines −1/2 → −3/2, −1/2 → 1/2, 1/2 → −1/2, and 1/2 → 1/2 respectively. (2) Since these R(v)'s are found to be much different from those that would be achieved through a pumping scheme using the Jeffries–Abragam effect, the possibility of using the Mössbauer effect to distinguish between the various ways of producing the nuclear orientation is suggested.

Theory of Resonance Absorption Line Shapes in Monatomic Gases

1965 ◽  
Vol 137 (3A) ◽  
pp. A683-A698 ◽  
Author(s):  
Gene P. Reck ◽  
Hisao Takebe ◽  
C. Alden Mead
Keyword(s):  
Absorption Line ◽  
Resonance Absorption ◽  
Line Shapes ◽  
Resonance Absorption Line
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