Imaging Fluorescence of He_{2}^{*} Excimers Created by Neutron Capture in Liquid Helium II.

Journal

Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141

Informations de publication

Date de publication:
03 Apr 2020
Historique:
received: 15 10 2019
accepted: 15 12 2019
entrez: 18 4 2020
pubmed: 18 4 2020
medline: 18 4 2020
Statut: ppublish

Résumé

We show unequivocal evidence for formation of He_{2}^{*} excimers in liquid He II created by ionizing radiation produced through neutron capture. Laser beams induce fluorescence of the excimers. The fluorescence is recorded at a rate of 55.6 Hz by a camera. The location of the fluorescence is determined with an uncertainty of 5  μm. The technique provides an opportunity to record the flow of He_{2}^{*} excimers in a medium with very small viscosity and enables measurement of turbulence around macroscopic liter size objects or vortex matter in three dimensions.

Identifiants

DOI: 10.1103/PhysRevLett.124.134502 PMID: 32302187
pubmed: 32302187
doi: 10.1103/PhysRevLett.124.134502
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

134502

Auteurs

X Wen (X)

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
Shull Wollan Center-A Joint Institute for Neutron Sciences, Oak Ridge, Tennessee 37830, USA.

S R Bao (SR)

Mechanical Engineering Department, Florida State University, Tallahassee, Florida 32310, USA.
National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA.

L McDonald (L)

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Department of Mechanical, Aerospace, and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.

J Pierce (J)

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.

G L Greene (GL)

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.

Lowell Crow (L)

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.

Xin Tong (X)

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China.
Spallation Neutron Source Science Center, Dongguan 523803, China.

A Mezzacappa (A)

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
Joint Institute for Computational Sciences, Oak Ridge, Tennessee 37830, USA.

R Glasby (R)

Department of Mechanical, Aerospace, and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
Joint Institute for Computational Sciences, Oak Ridge, Tennessee 37830, USA.

W Guo (W)

Mechanical Engineering Department, Florida State University, Tallahassee, Florida 32310, USA.
National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA.

M R Fitzsimmons (MR)

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
Shull Wollan Center-A Joint Institute for Neutron Sciences, Oak Ridge, Tennessee 37830, USA.

Classifications MeSH