Nuclear and Atomic Physics

    

The Absolutely Precise Frequency of the Hydrogen 21-cm Line

Authors: Gang Chen, Tianman Chen, Tianyi Chen

The hydrogen hyperfine transition or the hydrogen 21-cm line is critically important in astronomic and cosmic observations and in quantum mechanics. In our previous papers, we calculated out and determined the atomic unit of time (tau) to be 2.41888432658653278×10-17 s. With this value of tau, we calculated out and determined the precise frequencies of some atomic transitions of some atoms such as 1H, 27Al+, 40Ca, 87Sr, 115ln+, 171Yb, 171Yb+, 199Hg and 199Hg+ and the nuclear transition of 229Th*. In this paper, we calculate out and determine the absolutely precise frequency of the hydrogen 21-cm line to be 1420405751.76690576 Hz in comparison to the most precise measured value 1420405751.768(2) Hz or 1420405751.767(4) Hz.

Comments: 4 Pages. 1 Figure.

Download: PDF

Submission history

[v1] 2025-05-13 16:59:23

Unique-IP document downloads: 492 times

Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.

Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.

comments powered by Disqus