TY - JOUR
T1 - Coupled channel effects on resonance states of positronic alkali atom
AU - Yamashita, Takuma
AU - Kino, Yasushi
N1 - Funding Information:
This work was financially supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, JSPS KAK-ENHI, and Division for International Advanced Research and Education (DIARE), Tohoku University. The computation was partially carried out on the supercomputers in Kyushu University and KEK.
Publisher Copyright:
© 2018, EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Abstract: S-wave Feshbach resonance states belonging to dipole series in positronic alkali atoms (e+Li, e+Na, e+K, e+Rb and e+Cs) are studied by coupled-channel calculations within a three-body model. Resonance energies and widths below a dissociation threshold of alkali-ion and positronium are calculated with a complex scaling method. Extended model potentials that provide positronic pseudo-alkali-atoms are introduced to investigate the relationship between the resonance states and dissociation thresholds based on a three-body dynamics. Resonances of the dipole series below a dissociation threshold of alkali-atom and positron would have some associations with atomic energy levels that results in longer resonance lifetimes than the prediction of the analytical law derived from the ion–dipole interaction. Graphical abstract: [Figure not available: see fulltext.].
AB - Abstract: S-wave Feshbach resonance states belonging to dipole series in positronic alkali atoms (e+Li, e+Na, e+K, e+Rb and e+Cs) are studied by coupled-channel calculations within a three-body model. Resonance energies and widths below a dissociation threshold of alkali-ion and positronium are calculated with a complex scaling method. Extended model potentials that provide positronic pseudo-alkali-atoms are introduced to investigate the relationship between the resonance states and dissociation thresholds based on a three-body dynamics. Resonances of the dipole series below a dissociation threshold of alkali-atom and positron would have some associations with atomic energy levels that results in longer resonance lifetimes than the prediction of the analytical law derived from the ion–dipole interaction. Graphical abstract: [Figure not available: see fulltext.].
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U2 - 10.1140/epjd/e2017-80542-6
DO - 10.1140/epjd/e2017-80542-6
M3 - Article
AN - SCOPUS:85040923815
VL - 72
JO - European Physical Journal D
JF - European Physical Journal D
SN - 1434-6060
IS - 1
M1 - 13
ER -