Published February 25, 2002 | Version v1
Journal article Metadata-only

Hypernuclear fine structure in 9ΛBe

Creators

  • 1. Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
  • 2. Department of Physics, Osaka University, Toyonaka 560-0043 (Japan)
  • 3. Brookhaven National Laboratory, Upton, New York 11973 (United States)
  • 4. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
  • 5. Department of Physics, University of Freiburg, Freiburg D-79104 (Germany)
  • 6. Department of Physics, Hampton University, Hampton, Virginia 23668 (United States)
  • 7. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  • 8. Physics Department, North Carolina A and T State University, Greensboro, North Carolina 27411 (United States)
  • 9. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

Description

With a germanium detector array (Hyperball), we observed two γ-ray peaks corresponding to the two transitions (5/2+→1/2+ and 3/2+→1/2+ ) in the 9Λ Be hypernucleus which was produced by the 9Be( K-, π-) reaction. The energies of the γ rays are 3029±2±1 keV and 3060±2±1 keV . The energy difference was measured to be 31.4+2.5-3.6 keV , which indicates a very small Λ -spin-dependent spin-orbit force between a Λ and a nucleon. This is the smallest level splitting by far ever measured in a hypernucleus

Additional details

Identifiers

DOI
10.1103/PhysRevLett.88.082501;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
88
Journal Issue
8
Journal Page Range
p. 082501-082501.4
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
35022208
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
BERYLLIUM 9; BERYLLIUM 9 TARGET; ENERGY-LEVEL TRANSITIONS; FINE STRUCTURE; GAMMA SPECTRA; GE SEMICONDUCTOR DETECTORS; HYPERNUCLEI; KAON REACTIONS; L-S COUPLING; NUCLEON-HYPERON INTERACTIONS; PIONS MINUS
Descriptors DEC
ALKALINE EARTH ISOTOPES; BARYON-BARYON INTERACTIONS; BERYLLIUM ISOTOPES; BOSONS; CHARGED-PARTICLE REACTIONS; COUPLING; ELEMENTARY PARTICLES; EVEN-ODD NUCLEI; HADRON REACTIONS; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; INTERMEDIATE COUPLING; ISOTOPES; LIGHT NUCLEI; MEASURING INSTRUMENTS; MESON REACTIONS; MESONS; NUCLEAR FRAGMENTS; NUCLEAR REACTIONS; NUCLEI; PARTICLE INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; RADIATION DETECTORS; SEMICONDUCTOR DETECTORS; SPECTRA; STABLE ISOTOPES; TARGETS

Optional Information

Notes
(c) 2002 The American Physical Society