Mainz 1997 – wissenschaftliches Programm

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A: Atomphysik

A 11: Poster II

A 11.7: Poster

Dienstag, 4. März 1997, 18:00–20:00, Poster II

PES and Transformation Mechanism of H₁+H₂L→H₁H₂+LinE_th≤E_rel≤3.0eV* — •VictorWeiKeh WU — VictorWeiKeh WU* & GuoZhong HE,*VBRLaboratory,33615Bi/SKLMRD,DaLian,PRChina

The reaction mechanism is mixed via Migration and Stripping. Both can be accompanied by the electron jump. The proportions of both can be estimated by comparison with the calculated F_v of the vib. energies of H₁H₂ and integral cross sections σ_H1H2 as the functions of E_rel, especially by matching not only the exp.values but also the profiles. E_rel,min, where the min. of F_v is, is a suitable criterion of the trend either Migration or Stripping is essential. For the case with the potential barrier (Ba+HBr and Sr+CH₃Br), the decreasing F_v-E_rel in the region E_th-E_rel,min the Migration is the greater part, on the contrary within E_rel,min-3.0eV the Stripping part is greater. The heavier L is, to higher E_rel the position of E_rel,min will be shifted (Ba+HBr at≈0.5eV/Ba+CH₃Br≈1.0eV); the lighter the H₁ is, to lower E_rel the position of E_rel,min will be shifted (Ba+HBr/K+HBr at≈0.4eV, Ba+CH₃Br/Sr+CH₃Br at≈0.75eV). A greater torque because of ΔD_o^o and potential gradient during the reaction in the bent config. of H₁-H₂-L¹ causes that the rot. excitation is more significant than the vibrational at E_rel,min, instead of that the vibrational is more predominant at E_rel smaller than E_rel,min and downwards to E_th because of the effect of Migration and/or potential well in Ba+CH₃Br./1/Victor W.K.WU,Oral & Poster,ISMB XIII,El Escorial (Jun.1991);CAPE IX,Brussels(Jul.1991)/*/Spons. by CAS,VBR & DFG.