Observation of halos in rotationally inelastic scattering of Na/sub 2/ from Ar

Journal Article · Sun Jun 01 04:00:00 EDT 1980 · J. Chem. Phys.; (United States)

OSTI ID:5285030

Serri, J A; Morales, A; Moskowitz, W; Pritchard, D E; Becker, C H; Kinsey, J L

We have measured level to level differential cross sections for rotational level changing collisions in ground state Na/sub 2/ with Ar: Na/sub 2/ (v''=0, j/sub i/=7)+Ar..-->..Na/sub 2/ (v''=0, j/sub f/)+Ar. Measurements range in ..delta..j(j/sub f/-j/sub i/) from -4 to 80 and in THETA to ..pi... A seeded supersonic beam source produces rotationally cold Na/sub 2/ with a narrow velocity distribution; the levels are isolated and the differential cross sections are measured with cw dye lasers, using a new technique, angular distributions using the Doppler shift. The differential cross sections display a sharp rise and slow decline, reaching a maximum at an angle which is roughly proportional to ..delta..j. We term these features ''halos''. (AIP)

• Research Organization: Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5285030
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 72:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ANGULAR DISTRIBUTION
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
INELASTIC SCATTERING
METALS
MOLECULE COLLISIONS
NONMETALS
RARE GASES
ROTATIONAL STATES
SCATTERING
SODIUM