FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2910155354> ?p ?o ?g. }

• W2910155354 abstract "We have investigated the microwave absorption spectra of cerium, praseodymium, neodymium and samarium in magnesium double nitrate at 4.2°K. We have also measured the bulk susceptibility of a nitric oxide clathrate and of potassium manganicyanide from 4.2°K to 300°K. APPARATUS: We used a 3 cm reflex klystron microwave spectrometer, obtaining temperatures down to 1.5°K by the use of fee liquid helium. A large water-cooled electromagnet produced homogeneous fields of up to 15 kilogauss which were usually measured by an ammeter showing the current through the coils. In order to measure the field accurately very close to the specimen at 4.2°K, but it was too broad to be very useful. The bulk susceptabilities were measured by means of a Sucksmith ring balance which covered the temperatures range from 2°K to 300°K by use of the free liquid helium, hydrogen and oxygen. The ring deflections were measured by means of two opposing selenium photocells in series with a sensitive galvanometer used as a null detector. The force on the specimen was produced by the imhomogeneous field of an air-cooled electromagnet. We were unable to obtain a field of suitable symmetry to measure the highly anisotropoc crystals. RESULTS THE DOUBLE NITRATES: Cerium: An absorption line was observed with g b =1.82 p 0.02 and g // = 0.25 p 0.05, and interpreted as a single electronic transition between the states coso | 1, - > - sino | 0 + > - coso | -1, + > + sino | 0, - h > in L,s quantizization where o = 17h°. Praseodymium: Six absorption lines were observed with the r.f. and d.c. fields parallel. They are interpreted as resulting from a single electronic transition having g // = 1.55 p 0.02 split by the nuclear spin of 5 ⁄ 2 into six hyperfine lines. The transition is ot between the states of a Kramers' doublet. A crystal field of C 3h symmetry will give a singlet and J doubts, which will be split by the Jahn Teller effect. We propose that the transition occurs between states described by J z quantizization as coso | p 2 > + sin o | m 4 > with o = 22°. The hyperfine parameters are interpreted in terms of the spin Hamiltonian H = βg // H z S z + AI z S z giving A = 0.078 p 0.001 cm -1 . Neodymium: A main line flanked by 15 resolved hyperfine lines was observed. They are interpreted as resulting from a single electronic transition having g b = 2.72 p 0.02 and g // = 0.45 p 0.05 split by the nuclear spins of 7 ⁄ 2 of two odd isotopes, Nd 143 and Nd 145 into sixteen hyperfine lines, one of which was not resolved from the main line. The hyperfine parameters are interpreted in terms of the usual spin Hamiltonian H =β[g // H z S z + g b ( H x S x + H y S y )] + AI z S z + Β(I x S x + I y S y ) giving B 143 = 0.0372 cm -1 B 145 = 0.0194 cm -1 The ratio of the nuclear magnetic moment of Nd 143 to that of Nd 145 is 1.61. The transition is proposed to occur within the Kramers' doublet in J z quantization of coso | p 7 ⁄ 2 > + sino | m 5 ⁄ 2 > where ∈ = 47° The line width of the main line was 170 gauss which is wider than theory predicts. Several weak unidentified lines were observed. Samarium: A main line flanked by 16 fully resolved hyperfine lines was observed. They are interpreted as resulting from a single electronic transition having gb = 0.40 p 0.05, g // = 0.76 p 0.01 split by the nuclear spins of 7 ⁄ 2 of two odd isotopes, Sm 147 . The hyperfine parameters are interpreted from the same spin Hamiltonian as (c) to be | A 147 = 0.0346 p 0.0005 cm -1 A 149 = 0.0287 p 0.0005 cm -1 B l 0.009 cm -1 for both isotopes M N 147 M N 149  = 1.22 The transition is proposed to occur within the Kramers' doublet in JJ z quantization of cos o | 5 ⁄ 2 p h > + sino | 7 ⁄ 2 p h > where o ~ 6°. The observed line width of 75 gauss is very much wider than theory predicts, but this may be due to a short spin lattice relaxation time. POTASSIUM MANGANICYANIDE: The effective magnetic moment, n = √ 3 X KT N β 2 approaches zero as the temperature is decreased, showing that the ground level is diamagnetic. From the temperature variation of n we can conclude that the covalent forces upon the M n +++ ion cannot be accurately represented by an electrostatic crystal field of cubic symmetry. At 293°K the affective magnetic moment of n = 3.6. NITRIC OXIDE CLATHRATE The effective magnetic moment of nitric oxide molecules trapped in the quinol lattice approaches zero as the temperature is decreased, showing that the ground level is diamagnetic. The first exited level is not far above the ground level as it is in the free molecule, and we conclude that there is a small interaction between the NO molecules and the quinol lattice. At 293°K, however, the susceptability of the NO in the clathrate is that of fee NO within the experimental error, viz. 47 x 10 -6 eml per gram." @default.
• W2910155354 created "2019-01-25" @default.
• W2910155354 creator A5090868373 @default.
• W2910155354 date "1953-01-01" @default.
• W2910155354 modified "2023-09-27" @default.
• W2910155354 title "An experimental study of paramagnetic susceptibility at low temperatures" @default.
• W2910155354 hasPublicationYear "1953" @default.
• W2910155354 type Work @default.
• W2910155354 sameAs 2910155354 @default.
• W2910155354 citedByCount "0" @default.
• W2910155354 crossrefType "dissertation" @default.
• W2910155354 hasAuthorship W2910155354A5090868373 @default.
• W2910155354 hasConcept C121332964 @default.
• W2910155354 hasConcept C124712363 @default.
• W2910155354 hasConcept C192562407 @default.
• W2910155354 hasConcept C26873012 @default.
• W2910155354 hasConcept C46141821 @default.
• W2910155354 hasConceptScore W2910155354C121332964 @default.
• W2910155354 hasConceptScore W2910155354C124712363 @default.
• W2910155354 hasConceptScore W2910155354C192562407 @default.
• W2910155354 hasConceptScore W2910155354C26873012 @default.
• W2910155354 hasConceptScore W2910155354C46141821 @default.
• W2910155354 hasLocation W29101553541 @default.
• W2910155354 hasOpenAccess W2910155354 @default.
• W2910155354 hasPrimaryLocation W29101553541 @default.
• W2910155354 hasRelatedWork W1663738670 @default.
• W2910155354 hasRelatedWork W1981748040 @default.
• W2910155354 hasRelatedWork W1985260936 @default.
• W2910155354 hasRelatedWork W1987930756 @default.
• W2910155354 hasRelatedWork W1991784324 @default.
• W2910155354 hasRelatedWork W1997203350 @default.
• W2910155354 hasRelatedWork W1999365781 @default.
• W2910155354 hasRelatedWork W2009636583 @default.
• W2910155354 hasRelatedWork W2013613712 @default.
• W2910155354 hasRelatedWork W2020946939 @default.
• W2910155354 hasRelatedWork W2022851682 @default.
• W2910155354 hasRelatedWork W2042624240 @default.
• W2910155354 hasRelatedWork W2055657448 @default.
• W2910155354 hasRelatedWork W2057270497 @default.
• W2910155354 hasRelatedWork W2072656639 @default.
• W2910155354 hasRelatedWork W2095055508 @default.
• W2910155354 hasRelatedWork W2098353661 @default.
• W2910155354 hasRelatedWork W2320594678 @default.
• W2910155354 hasRelatedWork W2333300295 @default.
• W2910155354 hasRelatedWork W2935141907 @default.
• W2910155354 isParatext "false" @default.
• W2910155354 isRetracted "false" @default.
• W2910155354 magId "2910155354" @default.
• W2910155354 workType "dissertation" @default.