Observation of ultracold-neutron production by 9-A cold neutrons in superfluid helium

Journal Article · Mon Mar 02 00:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.1323· OSTI ID:7047264

Yoshiki, H; Sakai, K; Ogura, M; Kawai, T; Masuda, Y; Nakajima, T; Takayama, T; Tanaka, S; Yamaguchi, A ^[1]

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1. Bubble Chamber Physics Laboratory, Tohoku University, Sendai 980 (Japan) National Laboratory for High Energy Physics, Oho, Tsukuba-shi, Ibaraki-ken 305 (Japan) Research Reactor Institute, Kyoto University, Osaka 590-04 (Japan)

Using velocity-analyzed cold neutrons we observed the production of ultracold neutrons in superfluid {sup 4}He at 0.45 to 1.5 K. Ultracold neutrons are produced for an incident neutron wavelength of 8.78{plus minus}0.06 A which agrees with the single-phonon emission theory. The temperature variation of the ultracold-neutron storage lifetime is also discussed.

• OSTI ID: 7047264
• Journal Information: Physical Review Letters; (United States), Vol. 68:9; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COLD NEUTRONS
SLOWING-DOWN
HELIUM II
NEUTRON TRANSPORT
ULTRACOLD NEUTRONS
PRODUCTION
LATTICE VIBRATIONS
LIFETIME
TEMPERATURE DEPENDENCE
BARYONS
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
FLUIDS
HADRONS
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
NEUTRAL-PARTICLE TRANSPORT
NEUTRONS
NUCLEI
NUCLEONS
QUANTUM FLUIDS
RADIATION TRANSPORT
STABLE ISOTOPES
665300* - Interactions Between Beams & Condensed Matter- (1992-)