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Title: X-ray induced mobility of molecular oxygen at extreme conditions

Abstract

An in situ Raman study of KClO 4 irradiated with x-rays in a diamond anvil cell is reported. Decompn. via KClO 4 + hν → KCl + 2O 2 was monitored via the O 2 vibron at 2, 6, and 9 GPa. For all pressures, the vibron grew in intensity and then diminished after successive irradn. suggesting that O 2 was diffusing away from the irradiated region. The diffusion rate accelerated with pressure increase, indicating that the nonhydrostatic pressure gradient was likely driving mol. diffusion of O. At 9 GPa, the vibron bifurcated suggesting that O 2 exists as 2 forms: interstitial and bulk solid. As a result, this method can be used to study molecular diffusion under extreme conditions.

Authors:
 [1];  [2];  [2];  [1];  [1];  [1]
  1. Univ. of Nevada, Las Vegas, NV (United States)
  2. Carnegie Inst. of Washington, Argonne, IL (United States)
Publication Date:
Research Org.:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1332813
Grant/Contract Number:  
NA0001982
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 103; Journal Issue: 22; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; diffusion; high pressure; molecule irradiation effects; diamond anvil cells; hard x-rays

Citation Formats

Pravica, Michael, Popov, Dmitry, Sinogeikin, Stanislav, Sneed, Daniel, Guardala, Griffin, and Smith, Quinlan. X-ray induced mobility of molecular oxygen at extreme conditions. United States: N. p., 2013. Web. doi:10.1063/1.4836475.
Pravica, Michael, Popov, Dmitry, Sinogeikin, Stanislav, Sneed, Daniel, Guardala, Griffin, & Smith, Quinlan. X-ray induced mobility of molecular oxygen at extreme conditions. United States. doi:10.1063/1.4836475.
Pravica, Michael, Popov, Dmitry, Sinogeikin, Stanislav, Sneed, Daniel, Guardala, Griffin, and Smith, Quinlan. Tue . "X-ray induced mobility of molecular oxygen at extreme conditions". United States. doi:10.1063/1.4836475. https://www.osti.gov/servlets/purl/1332813.
@article{osti_1332813,
title = {X-ray induced mobility of molecular oxygen at extreme conditions},
author = {Pravica, Michael and Popov, Dmitry and Sinogeikin, Stanislav and Sneed, Daniel and Guardala, Griffin and Smith, Quinlan},
abstractNote = {An in situ Raman study of KClO4 irradiated with x-rays in a diamond anvil cell is reported. Decompn. via KClO4 + hν → KCl + 2O2 was monitored via the O2 vibron at 2, 6, and 9 GPa. For all pressures, the vibron grew in intensity and then diminished after successive irradn. suggesting that O2 was diffusing away from the irradiated region. The diffusion rate accelerated with pressure increase, indicating that the nonhydrostatic pressure gradient was likely driving mol. diffusion of O. At 9 GPa, the vibron bifurcated suggesting that O2 exists as 2 forms: interstitial and bulk solid. As a result, this method can be used to study molecular diffusion under extreme conditions.},
doi = {10.1063/1.4836475},
journal = {Applied Physics Letters},
number = 22,
volume = 103,
place = {United States},
year = {2013},
month = {11}
}

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Cited by: 7 works
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Works referenced in this record:

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