Anisotropy and molecular rotation in resonant low-energy dissociative recombination.
Angular fragment distributions from the dissociative recombination (DR) of HD(+) were measured with well directed monochromatic low-energy electrons over a dense grid of collision energies from 7 to 35 meV, where pronounced rovibrational Feshbach resonances occur. Significant higher-order anisotropies are found in the distributions, whose size varies along energy in a partial correlation with the relative DR rate from fast-rotating molecules. This may indicate a breakdown of the nonrotation assumption so far applied to predict angular DR fragment distributions.
Max-Planck-Institut für Kernphysik, Heidelberg, Germany.
S
S
Novotny
H
H
Rubinstein
H
H
Buhr
O
O
Novotný
J
J
Hoffmann
M B
MB
Mendes
D A
DA
Orlov
C
C
Krantz
M H
MH
Berg
M
M
Froese
A S
AS
Jaroshevich
B
B
Jordon-Thaden
M
M
Lange
M
M
Lestinsky
A
A
Petrignani
D
D
Shafir
D
D
Zajfman
D
D
Schwalm
A
A
Wolf