The 1962 He3 scale of temperatures. IV. Tables

Sherman, R.H.; Sydoriak, S.G.; Roberts, Tricia

doi:10.6028/jres.068a.055

Cited by 161 publications

(12 citation statements)

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“…The latter gauge had a resolution of 25 /i, corresponding to a temperature resolution of 7 xl0~5 o K. The two pressure gauges were periodically intercompared to verify their continued accuracy, and were also on one occasion compared with a third unit. 15 During the current measurements temperatures were simultaneously determined from the above 4 He vapor-pressure thermometer and from the measured vapor pressure of the 3 He, using the T 58 scale 16 and the 3 He T 62 scale, 17 respectively. The 4 He temperature averaged about 2xl0~4 o K higher.…”

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confidence: 99%

Orthobaric Density ofHe3in the Critical Region

Zimmerman

Chase

1967

Phys. Rev. Lett.

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also measured the (limiting) thickness of the shock as a function of plasma density. At pressures p ^ 10~2 mm Hg, with *U^ and >^n the i-i and i-n collision mean free paths, respectively, we expect I to be determined entirely by >^-, i.e., Z~ 1/n. That this is the case can be seen from the data of Fig. 3(b), where I is shown as a function of the plasma density n ahead of the shock for a He gas pressure of ~10~2 mm Hg.In conclusion, our results indicate that in plasmas of comparable ion and electron temperatures Landau damping prevents the formation of a shock wave by overcoming the sharpening effect of the nonlinearities. Landau damp ing can, however, be "switched-off" by increasThe coexistence curve of 3 He has been measured by a dielectric constant technique in the neighborhood of the critical point. The parameters in the relation | (p-p c )/p c | =A[{T C~T )/T C ]P are found to be p c = 0.04134 g/cm 3 , T C =3.3095°K, A = 1.323, and /3 = 0.362. Our value of T c is some 14 mdeg lower than previous measurements indicate, and our value of j3 more nearly in agreement with values characteristic of other fluids than was previously found.ations from the law of corresponding states. Recent work by Roach and Douglass 11 casts doubt on this suggestion. They find that for 4 He, 0 = 0.352±0.003, which is to be compared with an earlier estimate 9 of 0.46. Such quantum deviations, if present, should be largest of all for 3 He. We have accordingly measured its coexistence curve by means of a dielectric constant technique, using an improved version of an apparatus previously described, 12 and find j3 = 0.362± 0.001. Any such deviations are therefore substantially smaller than earlier data suggested. We also find that T c is some 14 mdeg lower than previously reported. This correction is largely responsible for our smaller value of /3, since far from the critical point our data agree well with the results of others. 6 ' 13 151 ing T e /T^ from unity to about 10 or so. Further details on our measurements will be presented at a later date.Finally, it should be noted that our results may be relevant to shock formation in interplanetary plasmas.

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confidence: 99%

Orthobaric Density ofHe3in the Critical Region

Zimmerman

Chase

1967

Phys. Rev. Lett.

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“…The 1976 Provisional 0.5 K to 30 K Temperature Scale (EPT-76) [20,21] was introduced to solve two shortcomings of the IPTS-68: it did not extend to low enough temperatures (the helium vapor-pressure scales [22,23] had not been incorporated) and both the 1958 4 He and 1962 3 He vapor-pressure scales as well as the IPTS-68 deviated significantly (by as much as 7 mK) from thermodynamic temperature (and these deviations were in opposite directions). Further, there was no internationally-agreed temperature scale from 5 K to 13.81 K. The intended purpose of the EPT-76 is best described by its creators: "This introduction of the EPT-76 will satisfy the need for a provisional practical temperature scale which can be used together with the IPTS-68 for temperatures from 0.5 K to above room temperature.…”

Section: The Road To the Its-90mentioning

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An evolutionary approach to updating the international temperature scale

Hill¹

2013

AIP Conference Proceedings

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“…For the mode referred to as concentration fluctuations, I o~nx c~A1-1 u~ = 0, Po = 0, Z0 = na + - (17) r114~ ~X P,T This isobaric mode is diffusive rather than oscillatory. The velocities u 1 and u2 of first and second sound are determined from the two expressions…”

Section: T3-~mentioning

confidence: 99%

Brillouin scattering from superfluid 3He-4He solutions

1975

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We have carried out Brillouin scattering experiments in superfluid 3He-4He solutions at six molar concentrations (x = 0.050, 0.100, 0.135, 0.250, 0.398, and 0.606) for temperatures as low as 0.4 K. We have measured the relative scattered intensities from the three normal modes: first sound, second sound, and concentration fluctuations. We have obtained the velocity ofhigh-fi'equency first sound (~ 600 MHz), the velocity of high-frequency second sound , and, at low concentrations, rough indications of the damping of the modes. An exact calculation of the scattered intensities is presented and used together with our measured intensities to obtain values for three thermodynamic quantities: Pn/P, (c~A/~X)p,T, and (c~A/c~T)p,x .

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The 1962 He3 scale of temperatures. IV. Tables

Cited by 161 publications

References 5 publications

Orthobaric Density ofHe3in the Critical Region

Orthobaric Density ofHe3in the Critical Region

An evolutionary approach to updating the international temperature scale

Brillouin scattering from superfluid 3He-4He solutions

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