期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 108, 期 15, 页码 6014-6019出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1102760108
关键词
diamond anvil cell; high pressure; Raman scattering; laser heating; melting
资金
- Department of Energy National Nuclear Security Adminstration (Carnegie/DOE Alliance Center) [DE-FC52-08NA28554]
- National Science Foundation Division of Materials Research [DMR-0805056]
- US Army Research Office
- National Aeronautics and Space Administration Astrobiology Institute
- Department of Energy Office of Basic Energy Sciences Energy Frontier Research Center at the Carnegie Institution of Washington (EFree)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [805056] Funding Source: National Science Foundation
Raman spectroscopy in laser-heated diamond anvil cells has been employed to probe the bonding state and phase diagram of dense hydrogen up to 140 GPa and 1,500 K. The measurements were made possible as a result of the development of new techniques for containing and probing the hot, dense fluid, which is of fundamental importance in physics, planetary science, and astrophysics. A pronounced discontinuous softening of the molecular vibron was found at elevated temperatures along with a large broadening and decrease in intensity of the roton bands. These phenomena indicate the existence of a state of the fluid having significantly modified intramolecular bonding. The results are consistent with the existence of a pressure-induced transformation in the fluid related to the presence of a temperature maximum in the melting line as a function of pressure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据