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Author Foehl, K. ♦ Barnett, B. M. ♦ Bilger, R. ♦ Clement, H. ♦ Krell, S. ♦ Wagner, G. J. ♦ Jaki, J. ♦ Joram, C. ♦ Kluge, W. ♦ Metzler, M. ♦ Wieser, R. ♦ Boudrie, R. L. ♦ Morris, C. L. ♦ Abela, R. ♦ Foroughi, F. ♦ Renker, D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ TELLURIUM 128 TARGET ♦ PION PLUS REACTIONS ♦ CHARGE EXCHANGE ♦ TELLURIUM 130 ♦ PIONS MINUS ♦ HEAVY NUCLEI ♦ GROUND STATES ♦ ISOTOPES ♦ CROSS SECTIONS ♦ BETA DECAY ♦ XENON 128 ♦ XENON 130 ♦ ISOBARIC ANALOGS
Abstract Data of the ({pi}{sup +},{pi}{sup {minus}}) reaction on {sup 128}Te and {sup 130}Te at {ital T}{sub {pi}}=48 MeV are presented, which constitute also the first observation of pionic double charge exchange (DCX) on heavy nuclei at energies below the (3,3) resonance. For the ground state transitions in these isotopes we find very small cross sections of about 15 nb/sr only at 30{degree} and a ratio of {sigma}({sup 130}Te)/{sigma}({sup 128}Te)=1.5{sub {minus}0.8}{sup +1.8}. The experimental results and their impact on the understanding of the {beta}{beta} decay of the Te isotopes are discussed within the framework of recent proton-neutron quasiparticle random phase approximation calculations. For the transitions to the double isobaric analog states in {sup 128}Xe and {sup 130}Xe we obtain cross sections in the range 1 {mu}b/sr which fit very well into a systematics, that is in accordance with a dominance of the short-range part of the DCX operator in analog transitions at low pion energies. {copyright} {ital 1996 The American Physical Society.}
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-05-01
Publisher Place United States
Journal Physical Review, C
Volume Number 53
Issue Number 5


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