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Type of Document	Dissertation
Author	Ungar, Jeffrey Eugene
URN	etd-11032005-112918
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-11032005-112918
Title	Double charge exchange of pions on helium-4
Degree	PhD
Option	Applied Physics
Advisory Committee	Advisor Name Title Robert D. McKeown Committee Chair
Keywords	none
Date of Defense	1982-12-15
Availability	unrestricted
Abstract NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. The reaction [...] at an incident [...] energy of 165 Mev has been measured at [...] in a search for bound states of the tetraneutron and resonant states in the continuum. No resonant structure was observed, and a cross section of 7 ± 15 nb/sr has been determined for bound tetraneutron production by this reaction. The measured cross section magnitudes are consistent with the related measurements of Falomkin et at and Stetz et al, but are larger than the results of Kaufman et al and the calculations of Gibbs et al by a factor of at least 100. The relevance of these results to identification of the pion double charge exchange reaction mechanism is discussed.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    Ungar_je_1983.pdf 2.70 Mb 00:12:29 00:06:25 00:05:37 00:02:48 00:00:14