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

Journal Article · Sun Jun 01 00:00:00 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), Vol. 72:11
• Country of Publication: United States
• Language: English

Related Subjects

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