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Zeeman-Tuned Rotational Level-Crossing Spectroscopy in a Diatomic Free Radical Phys. Rev. Lett. 112 , 163002 Published 25 April 2014 S. B. Cahn, J. Ammon, E. Kirilov, Y. V. Gurevich, D. Murphree, R. Paolino, D. A. Rahmlow, M. G. Kozlov, and D. DeMille
Rotational levels family of molecular free radicals can be tuned to degeneracy by using laboratory-scale magnetic fields. Because of their intrinsically narrow width, these level crossings of opposite-parity states have been proposed for use in the study of parity-violating interactions and other applications. We experimentally study a typical manifestation of this system using BaF 138 . Using a Stark-mixing method for detection, we demonstrate level-crossing signals with spectral width as small as 6 kHz. We use our data to verify the predicted line shapes, transition dipole moments, and Stark shifts family and to precisely determine molecular magnetic g factors. Our results constitute an initial proof of concept for use of this system to study nuclear spin-dependent parity-violating family effects.
S. B. Cahn 1,* , J. Ammon 1 , E. Kirilov 1, , Y. V. Gurevich 1 , D. Murphree 1, , R. Paolino 2 , D. A. Rahmlow 1, , M. G. Kozlov 3 , and D. DeMille 1, 1 Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520, USA 2 Department of Science, U.S. Coast Guard Academy, 31 Mohegan Avenue, New London, Connecticut 06320, family USA 3 Petersburg Nuclear Physics Institute, Gatchina 188300, Russia * sidney.cahn@yale.edu Present address: Universität Innsbruck, Institut für Experimentalphysik, Technikerstrasse 25/4, A-6020 Innsbruck, Austria. Present address: 3002 Avalon Cove Court NW, Rochester, MN 55901, USA. Present address: Wyatt Technology Corporation, 6300 Hollister Avenue, Santa Barbara, CA 93117, USA. david.demille@yale.edu References (Subscription Required)
Level crossings in BaF138. Up- (down-) sloping levels belong to the even- (odd-) parity N=0 (N=1) rotational level. Kets label the approximate quantum numbers |mS,mI,mN . Letters label each crossing where levels can be mixed via the Stark effect.
Level-crossing line shape data (points) and predictions family (curves). (a) Single-step potential family and Ez field at a Δm=0 transition. (b) Single-step potential and Eρ field at a Δm=1 transition. (c) Seven-step linear potential and Ez field at a Δm=0 transition. Insets show the relevant component of E vs z position, with identical z scales. Predicted line shapes include effects of molecule distributions in ρ and v and, for (b) only, IR centration and the polarizability α (see Fig. 4).
Rabi flopping behavior on crossing A. The fit includes the effect of the measured velocity distribution, which accounts for the contrast decay as E increases. The only free parameter in the fit is the dipole matrix element, determined here as dA=3.36(4) kHz/(V/cm).
Level-crossing spectra with the polarizability effect evident. Data are shown for crossing E, where the small value of d leads to a pulse area Θ 2dE0σt 1 even at large E. Curves, calculated with optimized values of d and α, include effects from finite family spatial and velocity distributions and imperfect IR centration. Insets show the evolution of the crossing level energies vs time during the pulse. ×
ISSN 1079-7114 (online), 0031-9007 (print). Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement . Physical Review Letters is a trademark of the American Physical Society. family
Journal: Phys. Rev. Lett. Rev. Mod. Phys. Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. X Phys. Rev. Applied Phys. Rev. ST Accel. Beams Phys. Rev. ST Phys. Educ. Res. Phys. Rev. Phys. Rev. (Series I) Physics
Ex: "PRL 112 068103", "Phys. Rev. Lett. 112, 068103", "10.1103/PhysRevLett.112.068103"
Zeeman-Tuned Rotational Level-Crossing Spectroscopy in a Diatomic Free Radical Phys. Rev. Lett. 112 , 163002 Published 25 April 2014 S. B. Cahn, J. Ammon, E. Kirilov, Y. V. Gurevich, D. Murphree, R. Paolino, D. A. Rahmlow, M. G. Kozlov, and D. DeMille
Rotational levels family of molecular free radicals can be tuned to degeneracy by using laboratory-scale magnetic fields. Because of their intrinsically narrow width, these level crossings of opposite-parity states have been proposed for use in the study of parity-violating interactions and other applications. We experimentally study a typical manifestation of this system using BaF 138 . Using a Stark-mixing method for detection, we demonstrate level-crossing signals with spectral width as small as 6 kHz. We use our data to verify the predicted line shapes, transition dipole moments, and Stark shifts family and to precisely determine molecular magnetic g factors. Our results constitute an initial proof of concept for use of this system to study nuclear spin-dependent parity-violating family effects.
S. B. Cahn 1,* , J. Ammon 1 , E. Kirilov 1, , Y. V. Gurevich 1 , D. Murphree 1, , R. Paolino 2 , D. A. Rahmlow 1, , M. G. Kozlov 3 , and D. DeMille 1, 1 Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520, USA 2 Department of Science, U.S. Coast Guard Academy, 31 Mohegan Avenue, New London, Connecticut 06320, family USA 3 Petersburg Nuclear Physics Institute, Gatchina 188300, Russia * sidney.cahn@yale.edu Present address: Universität Innsbruck, Institut für Experimentalphysik, Technikerstrasse 25/4, A-6020 Innsbruck, Austria. Present address: 3002 Avalon Cove Court NW, Rochester, MN 55901, USA. Present address: Wyatt Technology Corporation, 6300 Hollister Avenue, Santa Barbara, CA 93117, USA. david.demille@yale.edu References (Subscription Required)
Level crossings in BaF138. Up- (down-) sloping levels belong to the even- (odd-) parity N=0 (N=1) rotational level. Kets label the approximate quantum numbers |mS,mI,mN . Letters label each crossing where levels can be mixed via the Stark effect.
Level-crossing line shape data (points) and predictions family (curves). (a) Single-step potential family and Ez field at a Δm=0 transition. (b) Single-step potential and Eρ field at a Δm=1 transition. (c) Seven-step linear potential and Ez field at a Δm=0 transition. Insets show the relevant component of E vs z position, with identical z scales. Predicted line shapes include effects of molecule distributions in ρ and v and, for (b) only, IR centration and the polarizability α (see Fig. 4).
Rabi flopping behavior on crossing A. The fit includes the effect of the measured velocity distribution, which accounts for the contrast decay as E increases. The only free parameter in the fit is the dipole matrix element, determined here as dA=3.36(4) kHz/(V/cm).
Level-crossing spectra with the polarizability effect evident. Data are shown for crossing E, where the small value of d leads to a pulse area Θ 2dE0σt 1 even at large E. Curves, calculated with optimized values of d and α, include effects from finite family spatial and velocity distributions and imperfect IR centration. Insets show the evolution of the crossing level energies vs time during the pulse. ×
ISSN 1079-7114 (online), 0031-9007 (print). Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement . Physical Review Letters is a trademark of the American Physical Society. family
Journal: Phys. Rev. Lett. Rev. Mod. Phys. Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. X Phys. Rev. Applied Phys. Rev. ST Accel. Beams Phys. Rev. ST Phys. Educ. Res. Phys. Rev. Phys. Rev. (Series I) Physics
Ex: "PRL 112 068103", "Phys. Rev. Lett. 112, 068103", "10.1103/PhysRevLett.112.068103"
