Thermal expansion and phase changes in methane and nitrogen at Pluto temperatures

Simple item page
dc.contributor.authorBrand, HEAen_AU
dc.contributor.authorMaynard-Casely, HEen_AU
dc.date.accessioned2021-10-20T23:49:54Zen_AU
dc.date.available2021-10-20T23:49:54Zen_AU
dc.date.issued2018-03-22en_AU
dc.date.statistics2021-10-12en_AU
dc.description.abstractIntroduction: Some of the most striking images from the New Horizons fly-by of Pluto were of the towering mountains surrounded by seemingly flowing glacial terrain (Figure 1) [1]. The explanation for this terrain has its basis in crystallography, where at 44 K the strength of the hydrogen bond endows water ice with the resilience to build such mountains, while the rotational disorder in the solid structure of methane [2] and nitrogen [3] allow these materials to flow plastically even at 44K. These interpretations have been strengthened by the spectral observations that correlate these materials to the respective terrains [4]. In order to undertake accurate modelling of the geological features on Pluto the physical properties of the constituent materials must be well constrained. There is much still to be understood about the interactions and structural behaviours at these frigid temperatures, and crystallographic investigations can play a vital role in characterising these. Although water-ice has been the subject of intensive laboratory studies, the same cannot be said of methane and nitrogen. The thermal expansions of these materials have been investigated [5], but only to a lowest temperature of 40 K and using techniques which were largely insensitive to, in particular, the hydrogen positions within methane. Thus, the aim of the experiments reported here is to investigate the structures of the phases formed and determine the thermal expansion of methane and nitrogen over temperatures relevant to Plutonian processes using neutron diffraction.en_AU
dc.identifier.citationBrand, H. E. A. & Maynard-Casely, H. E. (2018). Thermal expansion and phase changes in methane and nitrogen at Pluto temperatures. Poster presented at the 49th Lunar and Planetary Science Conference, The Woodlands, Texas, USA, March 19-23, 2018 (No. 2083, pp. 1839). Retrieved from: https://www.hou.usra.edu/meetings/lpsc2018/program/en_AU
dc.identifier.conferenceenddate23 March 2018en_AU
dc.identifier.conferencename49th Lunar and Planetary Science Conferenceen_AU
dc.identifier.conferenceplaceTexas, USAen_AU
dc.identifier.conferencestartdate19 March 2018en_AU
dc.identifier.otherAbstract # 2083en_AU
dc.identifier.pagination1839en_AU
dc.identifier.urihttps://www.hou.usra.edu/meetings/lpsc2018/program/en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12019en_AU
dc.language.isoenen_AU
dc.publisherUniversities Space Research Associationen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCrystallographyen_AU
dc.subjectNitrogenen_AU
dc.subjectMethaneen_AU
dc.subjectPhase transformationsen_AU
dc.subjectPluto planeten_AU
dc.subjectSpace vehiclesen_AU
dc.titleThermal expansion and phase changes in methane and nitrogen at Pluto temperaturesen_AU
dc.typeConference Posteren_AU
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
1839.pdf
Size:
191.21 KB
Format:
Adobe Portable Document Format
Description:
Download
Thumbnail Image
Name:
LPSC2018_program_final.pdf
Size:
2.46 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications