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S- and P-state annihilation in p̄d interactions at rest

✍ Scribed by C.J. Batty

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
151 KB
Volume
703
Category
Article
ISSN
0375-9474

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✦ Synopsis

X-ray yield data for pd atoms has been fitted with a cascade model to obtain information on the fraction of annihilation from atomic s-, p-and d-states as a function of D 2 target density. Assuming that the cascade model parameter K 0 is the same for both pp and pd atoms, typical values of 75% and 40% are obtained for the fraction of annihilation from atomic p-states in 1 atm. gaseous and liquid D 2 , respectively. An analysis of two-body branching ratios with a "spectator nucleon" model gives the fraction of P-state annihilation to be (34 ± 4)% and (40 ± 2)% for the same targets. The relationship between the fraction of annihilation from atomic s-and p-states and the fraction of Sand P-state annihilation is discussed with particular reference to the phenomena of "induced" P-state annihilation.

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