lewis_1933#
G. N. Lewis and M. F. Ashley, “The Spin of Hydrogen Isotope”, Phys. Rev. 43, 837 (1933)
Source record · Catalogue · Review register
Source kind: measurement
Recorded technique: Emission spectrum of molecular hydrogen containing about 25 % H1H1, 50 % H1H2 and 25 % H2H2, photographed in the first order of a 21-foot grating; seven alpha-bands (Fulcher) of H2H2 (D2) with P, Q and R branches examined (p. 837).
Materials in structured entries: None recorded.
Dataset quantities: None recorded.
Contents: 0 datasets; 0 formulas.
Curation notes#
A letter to the editor (Phys. Rev. 43, 837 (1933), dated May 3, 1933), one page; the library’s page begins with Coates’s letter on x-rays from mercury ions, which is unrelated, and the text columns are interleaved in the library’s Markdown (read in order: ‘... The Q-branches are strong and the relative intensity of their lines is being investigated. ...’). Identity VALIDATED_WITH_WARNINGS (DOI 10.1103/PhysRev.43.837.2); first page checked.
What the letter states about D2 (TC-105): ‘In all cases the transitions involving even rotational levels are more intense than those involving the odd. This shows at once that the spin of H2 [the deuteron] is neither zero, 1/2 nor 3/2. It may be stated without reasonable doubt that this spin is 2/2, or twice the spin of H1.’ No intensity ratio is printed: the letter gives the even-J-stronger alternation and the spin 1, qualitatively. It is the first of the three: murphy_1934 measures the ratio (1.97 +- 0.03 : 1), farkas_1934 prints the weights (t + 1)(2t + 1) and t(2t + 1), i.e. 6 and 3, and cites this letter for the alternation.
No refractive data: no datasets.
Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.
Datasets#
No datasets are recorded.
Formulas#
No formulas are recorded.
Corrections#
No dataset errata are recorded in this source record.
Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.