| viXra.org > Nuclear and Atomic Physics > 2501 |
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| viXra.org > Nuclear and Atomic Physics > 2501 |
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[4] viXra:2501.0111 [pdf] submitted on 2025-01-21 21:19:34
Authors: H. M. Jamil, M. A. Rahman, Mubdiul Hasan
Comments: 23 Pages.
Clinical assessment: Radiologists utilize CT numbers to assess healthy and ill tissues; therefore, precision is essential. Most quality control protocols use different phantoms to check this crucial factor and other parameters. This study evaluates the performance of the System Performance Phantom (SPP) as it assesses all Image Quality Control parameters of a CT scanner (Part of TF PET-CT System, Ingenuity Model, Philips).
Category: Nuclear and Atomic Physics
[3] viXra:2501.0095 [pdf] replaced on 2025-03-06 20:53:36
Authors: Gang Chen, Tianman Chen, Tianyi Chen
Comments: 19 Pages. In Chinese (Note by viXra Admin: Frequent and/or repeated replacement submissions will not be accepted)
The accurate measurements of the frequency of the nuclear energy level transition of 229Th base state to excited state 229mTh (the frequency of 229Th nuclear transition for short) is critical to realize nuclear clocks. On 04 December 2024 Prof. Jun Ye’s laboratory reported the most accurate measured value for this frequency, i.e., 2.020407384335(2)×1015 Hz, with 12 precise digits, and gave its ratio with the frequency of 87Sr optical atomic clock, i.e., 4.707072615078(5). In this paper, we construct reasonable formulas, and calculate out the reciprocal of the frequency of 229Th nuclear transition in atomic units, the reciprocal of the frequency of 87Sr optical atomic clock in atomic units and the ratio between them, which are 20.461899741458143308, 96.315647925496289349 and 4.7070726150783448253 respectively. As the most accurate measured frequency of 87Sr optical atomic clock is 429228004229872.99(8) Hz, we calculate out the frequency of 229Th nuclear transition which is 2020407384335167.11(38) Hz, with 15 precise digits. We also calculate out the more precise values of the atomic unit of time, which is 2.41888432658653284(45)×10-17 s, and hence calculate out more precise Rydberg constant, Hartree energy, Bohr radius, classical electron radius and electron mass.
Category: Nuclear and Atomic Physics
[2] viXra:2501.0055 [pdf] submitted on 2025-01-10 20:16:21
Authors: Gang Chen, Tianman Chen, Tianyi Chen
Comments: 9 Pages. 1 Figure, in Chinese.
The number 2025 is the square of 45, and 45 is the sum of 1 to 9 which are the natural numbers in decimal number system, this makes 2025 have some wonderful mathematic properties. This paper illustrates and explains these mathematic properties, and points out these properties are derived from the special number 45. This also leads to a question, i.e., is the number 45 has scientific meanings? This paper exhibits the marvelous relationships between the nucleon numbers of the 45th element Rh and the nucleon numbers of some other critical elements, hence displays the scientific meanings of the number 45, and hence reveals that the decimal number system is scientific in the elements and nuclides. In fact, there are binary, senary, decimal and forteenary number systems in the elements and nuclides, which relate with each other and comprise the backbone of the elements and nuclides, this means they all are scientific. We think these four number systems derive from the principle of "a circle should be divided to 420 degrees, and the chirality corresponds to 840 degrees" which we supposed, they are the number systems based on the 1, 3, 5, 7 and 2 factors of 420 or 840 and could be called the natural number systems. In addition, there is a number system based on the base of the natural logarithm e, which could be called e number system and should be the integrated number system of all other natural number systems. In conclusion, the number systems are scientific.
Category: Nuclear and Atomic Physics
[1] viXra:2501.0003 [pdf] submitted on 2025-01-01 12:20:29
Authors: Gang Chen, Tianman Chen, Tianyi Chen
Comments: 20 Pages. 5 Figures, in Chinese.
This paper gives the precise relationship formula of π with the square root of 2 and the square root of 3, i.e., 2^0.5+3^0.5=πγ with γ=1.00148705350035u2026, and gives the relevant approximation formula which we found in 2022, i.e., 1.41+1.73=3.14, in which 1.41, 1.73 and 3.14 correspond to the centigrade approximations of the square root of 2, the square root of 3 and π respectively. We also review the applications of the formula of 1.41+1.73=3.14 in our theories including the centigrade natural number axis, the new atomic units, the new periodic table of elements, the chirality model of atomic nucleus and the periodic table of nuclides, the formulas of the fine-structure constant, the formulas of the speed of light in atomic units, the predictions of the super-heavy elements and the formulas of the anomalous magnetic moments of electron, muon and tauon. And hence we conclude that the formula of 1.41+1.73=3.14 is not just a coincidence but is a basic principle in the sub-atomic world.
Category: Nuclear and Atomic Physics
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