Deexcitation of He Rydberg S and manifold states by N/sub 2/

Journal Article · Mon Sep 01 00:00:00 EDT 1980 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.22.863· OSTI ID:5160424

Hitachi, A; King, T A; Kubota, S; Doke, T

The quenching cross sections for the He 2S--9S, 3 /sup 1/P, and n=5--9 manifold states by N/sub 2/, and n=6--9 manifold states by He, Ar, and Kr have been measured at 600 K. The cross section for 2 /sup 3/S by N/sub 2/ is 7.9(+1.2,-0.7) A/sup 2/, and the values obtained for nS-N/sub 2/ (n > or = 3) are 40--80 A/sup 2/ and increase slowly with n up to n=5 then show a plateau or decrease slightly with n. The cross sections for the /sup 1/S are about 1.3 times those for the /sup 3/S for n=3 and 5. The cross sections for the n=5, 8, and 9 manifold states by N/sub 2/ are nearly the same in magnitude as those for S states; however, those for rare-gas collisions are about one order smaller than those for N/sub 2/ collisions. The main mechanism for the quenching of He Rydberg states (n > or = 3) by N/sub 2/ is attributed to n-changing collisions due to excitation of molecular vibrations in N/sub 2/.

• Research Organization: Physics Department, Schuster Laboratory, University of Manchester, Manchester M13 9PL, England
• OSTI ID: 5160424
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 22:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DE-EXCITATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FLUIDS
HELIUM
HIGH TEMPERATURE
KRYPTON
MOLECULE COLLISIONS
NITROGEN
NONMETALS
P STATES
RARE GASES
S STATES