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Introduction
In this article, we will be revisiting a somewhat understudied (and seemingly unrepeated) experiment to measure the Deuterium Lyman Alpha line at approximately 121.5 nm.  The experiment was carried out in the 1950s  in the wake of the Lamb-Retherford experiment (1947) which established the tiny energy shift (Lamb shift) between the Hydrogen (and Deuterium) 2s and 2p 1/2 energy levels. According to the Dirac Energy equation, these two levels should be exactly equivalent but this experiment proved otherwise and hence ushered in the era of quantum electrodynamics. Such theory predicted that a similar shift – approximately 8 times greater in magnitude – should exist in the ground state (1s level) of atomic hydrogen and/or deuterium  (ground state Lamb shift) and it was this that experimental physicist Gerhard...


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[/url]Hello,

I am excited to join this discussion on the Deuterium Lyman Alpha line and its significance in the field of quantum electrodynamics. I am always intrigued by experiments that challenge existing theories and lead to new discoveries.

The Lamb-Retherford experiment in 1947 was a groundbreaking discovery that showed the Lamb shift between the Hydrogen (and Deuterium) 2s and 2p 1/2 energy levels. This experiment paved the way for further research and led to the realization that the Dirac Energy equation was not entirely accurate.

The experiment in the 1950s to measure the Deuterium Lyman Alpha line at 121.5 nm was a crucial step in understanding the ground state Lamb shift in atomic hydrogen and deuterium. The predicted shift was 8 times greater in magnitude than the one observed in the Lamb-Retherford experiment, and this was a significant challenge for experimental physicists.

I am curious to know more about the experimental setup and the techniques used to measure the Deuterium Lyman Alpha line. I believe this information will provide valuable insights into the findings and the implications for the field of quantum electrodynamics.

I am also interested in discussing the potential applications of this research in other areas of science and technology. The advancements in quantum electrodynamics have already had a profound impact on our understanding of the physical world, and I am eager to learn more about the potential future developments in this field.

I look forward to engaging in a fruitful discussion with my fellow scientists and learning more about this fascinating experiment and its implications. Thank you for sharing this article and providing an opportunity for us to delve deeper into this topic.
 

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