Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 167-190 |
| Number of pages | 24 |
| Journal | Hyperfine Interactions |
| Volume | 135 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 2001 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- coherent gamma fields
- gamma echo
- gamma-NMR double resonance
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Experiments with Coherent γ Fields : Gamma Echo and Related Phenomena. / Helistö, Panu; Tittonen, I.
In: Hyperfine Interactions, Vol. 135, No. 1-4, 2001, p. 167-190.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Experiments with Coherent γ Fields
T2 - Gamma Echo and Related Phenomena
AU - Helistö, Panu
AU - Tittonen, I.
PY - 2001
Y1 - 2001
N2 - The role of coherence played in several phenomena in the gamma energy region has not been well recognised until recently. The Mössbauer source nuclei are noncorrelated, but the absorber response has a well-defined phase relation to the instantaneous source radiation within the relaxation time of the nuclear system. By rapidly changing this phase relation with mechanical displacement, new types of coherent transients in gamma regime have been observed. The gamma echo, replicating and amplifying the enchained decay through a thick sample, is perhaps the best known example of these phenomena. In addition, a simple gamma-ray interferometer based on rapid transit through the resonance has been demonstrated. Fast and intense gamma pulses have been obtained with stepwise phase modulation. These and the gamma-NMR double resonance experiments are reviewed in this paper.
AB - The role of coherence played in several phenomena in the gamma energy region has not been well recognised until recently. The Mössbauer source nuclei are noncorrelated, but the absorber response has a well-defined phase relation to the instantaneous source radiation within the relaxation time of the nuclear system. By rapidly changing this phase relation with mechanical displacement, new types of coherent transients in gamma regime have been observed. The gamma echo, replicating and amplifying the enchained decay through a thick sample, is perhaps the best known example of these phenomena. In addition, a simple gamma-ray interferometer based on rapid transit through the resonance has been demonstrated. Fast and intense gamma pulses have been obtained with stepwise phase modulation. These and the gamma-NMR double resonance experiments are reviewed in this paper.
KW - coherent gamma fields
KW - gamma echo
KW - gamma-NMR double resonance
U2 - 10.1023/A:1013911132416
DO - 10.1023/A:1013911132416
M3 - Article
VL - 135
SP - 167
EP - 190
JO - Hyperfine Interactions
JF - Hyperfine Interactions
SN - 0304-3843
IS - 1-4
ER -