Published May 1993
| Version v1
Journal article
Fission of heavy hypernuclei formed in antiproton annihilation
Creators
- Armstrong, T.A.1, 2, 3, 4, 5, 6, 7, 8
- Bocquet, J.P.1, 2, 3, 4, 5, 6, 7, 8
- Ericsson, G.1, 2, 3, 4, 5, 6, 7, 8
- Johansson, T.1, 2, 3, 4, 5, 6, 7, 8
- Krogulski, T.1, 2, 3, 4, 5, 6, 7, 8
- Lewis, R.A.1, 2, 3, 4, 5, 6, 7, 8
- Malek, F.1, 2, 3, 4, 5, 6, 7, 8
- Maurel, M.1, 2, 3, 4, 5, 6, 7, 8
- Monnand, E.1, 2, 3, 4, 5, 6, 7, 8
- Mougey, J.1, 2, 3, 4, 5, 6, 7, 8
- Nifenecker, H.1, 2, 3, 4, 5, 6, 7, 8
- Passaneau, J.1, 2, 3, 4, 5, 6, 7, 8
- Perrin, P.1, 2, 3, 4, 5, 6, 7, 8
- Polikanov, S.M.1, 2, 3, 4, 5, 6, 7, 8
- Rey-Campagnolle, M.1, 2, 3, 4, 5, 6, 7, 8
- Ristori, C.1, 2, 3, 4, 5, 6, 7, 8
- Smith, G.A.1, 2, 3, 4, 5, 6, 7, 8
- Tibell, G.1, 2, 3, 4, 5, 6, 7, 8
- 1. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Institut National de Physique Nucleaire et de Physique des Particles, Centre National de la Recherche Scientifique, F-91405 Orsay (France)
- 2. Gesellschaft fuer Schwerionenforschumg Darmstadt, Postfach 110541, D-6100 Darmstadt (Germany)
- 3. Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606 (United States)
- 4. DRFMC, Centre d'Etudes Nucleaires de Grenoble, Boite Postale 85X, 3804 1 Grenoble (France)
- 5. Warsaw University, Bialystok Branch, PL-15-424 Bialystok (Poland)
- 6. Department of Radiation Sciences, Uppsala University, P. O. Box 535, S-75121 Uppsala (Sweden)
- 7. Institut des Sciences Nucleaires, Institut National de Physique Nucleaire et de Physique des Particles, Centre National de la Recherche Scientifique and University of Grenoble, Grenoble, CEDEX (France)
- 8. Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
Description
Heavy hypernuclei are produced in the annihilation of antiprotons in 238U. The delayed fission of heavy hypernuclei and hypernuclei of fission fragments are observed by using the recoil-distance method in combination with measurement of secondary electron multiplicity. The lifetime of hypernuclei in the region of uranium is found to be (1.25±0.15)x10-10 sec. It is observed that Λ hyperons predominantly stick to the heavier fission fragments. The yield of hypernuclei is found to be (7.4±1.7)x10-3 per stopped antiproton. No coincidences with K+ were found. Statistical and systematic errors on the number of events expected do not rule out this possibility
Additional details
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 47
- Journal Issue
- 5
- Journal Page Range
- p. 1957-1969.
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24055544
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ANNIHILATION; ANTIPROTON REACTIONS; ELECTRON EMISSION; FISSION; HYPERNUCLEI; LAMBDA BARYONS; LIFETIME; MULTIPLICITY; RECOILS; URANIUM 238 TARGET
- Descriptors DEC
- ANTINUCLEON REACTIONS; BARYON REACTIONS; BARYONS; ELEMENTARY PARTICLES; EMISSION; FERMIONS; HADRON REACTIONS; HADRONS; HYPERONS; INTERACTIONS; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; PARTICLE INTERACTIONS; STRANGE PARTICLES; TARGETS