Charge Transfer in He+ - He → He(1s4l, l ≥ 2) - He+ Collisions in Intermediate Energy Range

被引:0
作者
Kaminski, Patryk [1 ]
Drozdowski, Ryszard [1 ]
机构
[1] Univ Gdansk, Inst Expt Phys, Fac Math Phys & Informat, Ul Wita Stwosza 57, PL-80308 Gdansk, Poland
关键词
ion-atom collision; anticrossing spectroscopy; Stark effect; density matrix; PAUL-TRAP PROMOTION; SADDLE-POINT ELECTRONS; HELIUM-IONS INCIDENT; KEV PROTON IMPACT; EXCITED-STATES; EXCITATION; IONIZATION; VELOCITY; CAPTURE; ATOMS;
D O I
10.3390/ijms25147833
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The anticrossing spectra of the helium line lambda(1s4l(3)D,F-1s2p(3)P)=447.2 nm emitted after electron capture by He+ ions in He+-He collisions were measured for projectile energies of 10-29 keV. Furthermore, considering the excited states' time evolution, the theoretical intensity functions were calculated. The electric field and density distributions of the target He atoms in the collision volume were taken into account, and by fitting the theoretical intensities to the measured ones, the post-collisional states of the charge-transferred He atoms were determined. The results indicate that for the intermediate projectile energy range, the electronic charge distributions were asymmetric, but the electric dipole moments did not change, as in the case of the target atoms excited directly in the collisions. This result shows that the Paul trap mechanism may play an important role in the charge transfer excitation in this energy range.
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页数:23
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