Outputs (30)

A comparison of different Fourier transform procedures for analysis of diffraction data from noble gas fluids (2023)
Journal Article
Proctor, J. E., Pruteanu, C. G., Moss, B., Kuzovnikov, M. A., Ackland, G. J., Monk, C. W., & Anzellini, S. (2023). A comparison of different Fourier transform procedures for analysis of diffraction data from noble gas fluids. Journal of Applied Physics, 134(11), Article 114701. https://doi.org/10.1063/5.0161033

A comparison is made between the three principal methods for the analysis of neutron and x-ray diffraction data from noble gas fluids by direct Fourier transform. All three methods (standard Fourier transform, Lorch modification, and Soper–Barney mod... Read More about A comparison of different Fourier transform procedures for analysis of diffraction data from noble gas fluids.

Derivation of the Field Due to a Magnetic Dipole Without Use of the Vector Potential (2022)
Journal Article
Proctor, J. E., & Gould, H. T. (2023). Derivation of the Field Due to a Magnetic Dipole Without Use of the Vector Potential. Physics Teacher, 61(1), 40-42. https://doi.org/10.1119/5.0077127

The mathematical form of the magnetic field due to a current loop, and the fact that it is identical to the electric field due to an electric dipole in the far field, are fundamental to our understanding of electromagnetism. While undergraduate level... Read More about Derivation of the Field Due to a Magnetic Dipole Without Use of the Vector Potential.

Krypton and the fundamental flaw of the Lennard-Jones Potential (2022)
Journal Article
Pruteanu, C., Loveday, J., Ackland, G., & Proctor, J. (2022). Krypton and the fundamental flaw of the Lennard-Jones Potential. Journal of Physical Chemistry Letters, 13(35), 8284-8289. https://doi.org/10.1021/acs.jpclett.2c02004

We have performed a series of neutron scattering experiments on supercritical krypton. Our data and analysis allow us to characterize the Frenkel line crossover in this model monatomic fluid. The data from our measurements was analyzed using Empirica... Read More about Krypton and the fundamental flaw of the Lennard-Jones Potential.

Phase diagram of ethane above 300 K (2022)
Journal Article
Proctor, J., Spender, J., & Gould, H. (2022). Phase diagram of ethane above 300 K. Journal of Physical Chemistry C, 126(26), 10792-10799. https://doi.org/10.1021/acs.jpcc.2c00875

We have measured the melting curve of ethane from 300 to 450 K. Our results indicate that to describe all melting curve data above the triple point, it is necessary to account for a kink in the melting curve where the phase III–phase IV solid–solid t... Read More about Phase diagram of ethane above 300 K.

Characterization of the high-pressure and high-temperature phase diagram and equation of state of chromium. (2022)
Journal Article
Anzellini, S., Errandonea, D., Burakovsky, L., Proctor, J., Turnbull, R., & Beavers, C. (2022). Characterization of the high-pressure and high-temperature phase diagram and equation of state of chromium. Scientific reports, 12(1), 6727. https://doi.org/10.1038/s41598-022-10523-2

The high-pressure and high-temperature phase diagram of chromium has been investigated both experimentally (in situ), using a laser-heated diamond-anvil cell technique coupled with synchrotron powder X-ray diffraction, and theoretically, using ab ini... Read More about Characterization of the high-pressure and high-temperature phase diagram and equation of state of chromium..

High pressure photoluminescence of bismuth-doped yttria-alumina-silica glass (2022)
Journal Article
Hughes, M., McMaster, R., Proctor, J., Hewak, D., Suzuki, T., & Oshidi, Y. (2022). High pressure photoluminescence of bismuth-doped yttria-alumina-silica glass. High Pressure Research, https://doi.org/10.1080/08957959.2022.2044031

We report the effects of high pressure, up to 10.45 GPa, on the photoluminescence of Bi-doped yttria-alumina-silica (Bi:YAlSi) glass under 532 nm excitation. We identify three emission bands attributed to Bi3+, Bi+ and the controversial NIR emitting... Read More about High pressure photoluminescence of bismuth-doped yttria-alumina-silica glass.

Structural markers of the Frenkel line in the proximity of Widom lines (2021)
Journal Article
Pruteanu, C., Proctor, J., Alderman, O., & Loveday, J. (2021). Structural markers of the Frenkel line in the proximity of Widom lines. Journal of Physical Chemistry B, 125(31), 8902-8906. https://doi.org/10.1021/acs.jpcb.1c04690

We have performed a neutron scattering experiment on supercritical uid nitrogen at 160 K (1.27 TC) over a wide pressure range (7.8 MPa / 0.260 g/ml to 125 MPa / 0.805 g/ml). This has enabled us to study the process by which nitrogen changes from... Read More about Structural markers of the Frenkel line in the proximity of Widom lines.

Mechanical properties of graphene (2021)
Journal Article
Sun, Y. W., Papageorgiou, D. G., Humphreys, C. J., Dunstan, D. J., Puech, P., Proctor, J. E., …San-Miguel, A. (2021). Mechanical properties of graphene. Applied Physics Reviews, 8(2), 021310. https://doi.org/10.1063/5.0040578

This paper reviews the mechanical properties of graphene with particular attention to what is established and what is still uncertain. It clarifies the thickness and the elastic constants, and by also considering also phonon frequencies, it argues th... Read More about Mechanical properties of graphene.

Modeling of liquid internal energy and heat capacity over a wide pressure–temperature range from first principles (2020)
Journal Article
Proctor, J. (2020). Modeling of liquid internal energy and heat capacity over a wide pressure–temperature range from first principles. Physics of Fluids, 32, 107105. https://doi.org/10.1063/5.0025871

Recently, there have been significant theoretical advances in our understanding of liquids and dense supercritical fluids based on their ability to support high frequency transverse (shear) waves. Here, we have constructed a new computer model using... Read More about Modeling of liquid internal energy and heat capacity over a wide pressure–temperature range from first principles.

Raman spectroscopy of ethane (C 2 H 6 ) to 120 GPa at 300 K (2020)
Journal Article
Read, L., Spender, J., & Proctor, J. (2020). Raman spectroscopy of ethane (C 2 H 6 ) to 120 GPa at 300 K. Journal of Raman Spectroscopy, 51(11), 2311-2317. https://doi.org/10.1002/jrs.5971

We have conducted a Raman study of solid ethane (C2H6) at pressures up to 120 GPa at 300 K. We observe changes within the ν3 and ν11 Raman‐active vibrational modes providing evidence for several previously unobserved phase transitions at room tempera... Read More about Raman spectroscopy of ethane (C 2 H 6 ) to 120 GPa at 300 K.