Accession Number : AD0621353

Title :   SEARCH FOR AN EXCITED STATE OF THE BE9 HYPERNUCLEUS,

Corporate Author : OSLO UNIV (NORWAY) INST OF PHYSICS

Personal Author(s) : Frodesen,A. G. ; Lunde,F. ; Skjeggestad,O.

Report Date : 20 DEC 1964

Pagination or Media Count : 4

Abstract : Amoung 43 uniquely identified lambda He5 and 29 lambda He4,5 hypernuclei produced in association with stable prongs of range < 500 microns in K(-) capture stars in nuclear emulsions, a search has been made to detect possible lambda He5 originating from an excited state of lambda Be9 via the decay mode lambda Be9* to lambda He5 + He4. For each of the capture stars the effective mass of the lambda He and each of the stable prongs have been calculated on the assumption that the stable prongs are alpha-particles. The experimental effective mass distribution has been compared with background estimates from 'Monte Carlo' calculations. The data are consistent with no lambda He5 events coming from lambda Be9*. (Author)

Descriptors :   (*EXCITATION, NUCLEI), (*BERYLLIUM, NUCLEI), MESON CAPTURE, K MESONS, HELIUM

Distribution Statement : APPROVED FOR PUBLIC RELEASE