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Titolo:
Experimental determination of the translational kinetic energy of liquid and solid hydrogen
Autore:
Celli, M; Colognesi, D; Zoppi, M;
Indirizzi:
CNR, Ist Elettr Quantist, I-50127 Florence, Italy CNR Florence Italy I-50127 Ist Elettr Quantist, I-50127 Florence, Italy ISIS, Neutron Facil, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England ISIS Didcot Oxon England OX11 0QX ton Lab, Didcot OX11 0QX, Oxon, England CNR, Grp Nazl Struttura Mat, I-00185 Rome, Italy CNR Rome Italy I-00185CNR, Grp Nazl Struttura Mat, I-00185 Rome, Italy
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL B
fascicolo: 2, volume: 14, anno: 2000,
pagine: 239 - 244
SICI:
1434-6028(200003)14:2<239:EDOTTK>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
INELASTIC NEUTRON-SCATTERING; MOMENTUM DISTRIBUTION; DENSITY DEPENDENCE; PARAHYDROGEN; QUANTUM; STATE; NEON; CONDENSATE; BEHAVIOR; HE-4;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Celli, M CNR, Ist Elettr Quantist, Via Panciatichi 56-30, I-50127 Florence, Italy CNR Via Panciatichi 56-30 Florence Italy I-50127 Florence, Italy
Citazione:
M. Celli et al., "Experimental determination of the translational kinetic energy of liquid and solid hydrogen", EUR PHY J B, 14(2), 2000, pp. 239-244

Abstract

TOSCA is a novel inelastic spectrometer operating on the pulsed neutron source ISIS (UK). It covers a wide momentum and energy range, even though itskinematic region is close to a line in the (k, E) plane. Its use is mainlyintended for vibrational spectroscopy. However, taking advantage of its good resolving power, we have carried out a test experiment aimed to use thisinstrument to measure the centre of mass kinetic energy of molecular hydrogen. The experiment was successful and we have obtained the translational kinetic energy of liquid and solid para-hydrogen improving the overall accuracy by almost an order of magnitude with respect to previous determinations. The data are compared with the results of a Path Integral Monte-Carlo simulations with almost perfect agreement. We have demonstrated that TOSCA canbe used for measuring the translational kinetic energy of small molecular systems, taking advantage of the intrinsic incoherence that is introduced in the scattering process by the intra-molecular transitions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 13:32:23