000104905 001__ 104905
000104905 005__ 20181203020840.0
000104905 0247_ $$2doi$$a10.1063/1.2217736
000104905 02470 $$2DAR$$a9072
000104905 02470 $$2ISI$$a000239573100031
000104905 037__ $$aARTICLE
000104905 245__ $$aThe ultrafast structural response of solid parahydrogen: a complementary experimental/simulation investigation
000104905 269__ $$a2006
000104905 260__ $$c2006
000104905 336__ $$aJournal Articles
000104905 500__ $$aCAN 145:344187
000104905 500__ $$a73-5
000104905 500__ $$aOptical, Electron, and Mass Spectroscopy and Other Related Properties
000104905 500__ $$aLaboratoire de Spectroscopie Ultrarapide, ISIC, FSB-BSP,Ecole Polytechnique Federale de Lausanne (EPFL),Lausanne,Switz.
000104905 500__ $$aJournal
000104905 500__ $$a0021-9606
000104905 500__ $$awritten in English.
000104905 500__ $$a1333-74-0 (Hydrogen) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (para-, solid; pump-probe fluorescence depletion of); 10102-43-9 (Nitric oxide) Role: OCU (Occurrence, unclassified), PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), OCCU (Occurrence), PROC (Process) (pump-probe fluorescence depletion of solid parahydrogen contg. impurity)
000104905 520__ $$aA complete characterization, based on fs pump-probe spectroscopy and mol. dynamics simulations, is presented of the ultrafast dynamics of electronic bubble formation in solid para-H2 upon impulsive excitation of impurity-doped sites, which correlate with the lowest Rydberg state of the NO impurity. The high temporal resoln. of the expt. allows one to identify three time scales in the structural dynamics. A 1st ultrafast expansion (<150 fs), assocd. with the release of .apprx.80% of the excess energy available to the system after excitation, is accompanied by a transient narrowing of the spatial distribution of the 1st shell of H2 mols. around the impurity. In a subsequent stage (up to .apprx.800 fs), the cavity expansion slows down, and energy starts to flow irreversibly into the crystal. Finally, the lattice undergoes a slow structural reorganization at the impurity site (5-10 ps). A weak low-frequency recurrence, probably assocd. with an elastic response of the crystal, is obsd. at .apprx.10 ps. The absence of polarization dependence indicates that the dynamics is largely dominated by translational (radial) motions of the mols. surrounding NO and not by the rotational motion of the impurity. Mol. dynamics simulations with temp. corrections, to mimic zero-point fluctuations, fully support the exptl. results and show that the bubble model is suited to describe the dynamics of the system. Apparently the response of the medium around the impurity at short times is typical of a liq. solvent rather than that of a solid. [on SciFinder (R)]
000104905 6531_ $$aFluorescence (pump-probe depletion; of solid parahydrogen)
000104905 6531_ $$aparahydrogen para solid ultrafast structural response simulation
000104905 700__ $$0240903$$aBonacina, L.$$g161283
000104905 700__ $$aLarregaray, P.
000104905 700__ $$0240047$$avan Mourik, F.$$g155820
000104905 700__ $$0240045$$aChergui, M.$$g122830
000104905 773__ $$j125$$k5$$q054507/1-054507/11$$tJournal of Chemical Physics
000104905 909C0 $$0252026$$pLSU$$xU10862
000104905 909CO $$ooai:infoscience.epfl.ch:104905$$pSB$$particle
000104905 937__ $$aLSU-ARTICLE-2006-003
000104905 970__ $$a0000000014/LSU
000104905 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000104905 980__ $$aARTICLE