Theoretical model for enrichment of CH{sub 3}F nuclear-spin isomers by resonant microwave radiation

Journal Article · Sat Mar 01 04:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.033406· OSTI ID:20633862

Permyakova, O I; Ilisca, E; Chapovsky, P L ^[1]

---

1. Institute of Semiconductor Physics, Russian Academy of Sciences, 630090 Novosibirsk (Russian Federation)

A theoretical model of coherent control of nuclear-spin isomers by microwave radiation has been developed. The model accounts the M degeneracy of molecular states and molecular center-of-mass motion. The model has been applied to the {sup 13}CH{sub 3}F molecules. Microwave radiation excites the para state (J=11, K=1) which is mixed by the nuclear-spin-spin interaction with the ortho state (9,3). Dependences of the isomer enrichment and conversion rates on the radiation frequency have been calculated. Both spectra consist of two resonances situated at the centers of nuclear-spin-allowed and -forbidden transitions of the molecule. Larger enrichment, up to 7%, can be produced by strong radiation resonant to the forbidden transition. The spin conversion rate can be increased by two orders of magnitude at this resonance.

• OSTI ID: 20633862
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CENTER-OF-MASS SYSTEM
CONVERSION
FORBIDDEN TRANSITIONS
ISOMERS
J-J COUPLING
MICROWAVE RADIATION
MOLECULES
NUCLEAR MAGNETIC RESONANCE
ORGANIC FLUORINE COMPOUNDS
SPIN