Zeeman-tuned rotational level-crossing spectroscopy in a diatomic free radical.
نویسندگان
چکیده
Rotational levels 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 BaF138. 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 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 effects.
منابع مشابه
Photodissociation spectroscopy and dynamics of the HCCO free radical
The photodissociation spectroscopy and dynamics of the HCCO radical have been investigated using fast radical beam photofragment translational spectroscopy. An electronic band with origin at 33 424 cm has been identified. This band exhibits rotational resolution near the band origin, but the well-defined rovibronic structure is homogeneously broadened at higher photon energies. Based on the rot...
متن کاملFourier transform millimeter-wave spectroscopy of the ethyl radical in the electronic ground state.
The pure rotational spectrum of the ethyl radical (C2H5) has been detected for the first time with the Fourier transform millimeter-wave spectrometer. The ethyl radical is produced by discharging the C2H5I gas diluted in Ar. The 1(01)-0(00) rotational transition of the ethyl radical is observed in the frequency range from 43,680 to 43,780 MHz. The observed spectrum shows a very complicated patt...
متن کاملThe Hanle effect and level crossing spectroscopy in Rb vapour under strong laser excitation
We measure and simulate numerically the Hanle effect and non-zero field level crossing signals in 85Rb and 87Rb atoms in a magnetic field at room temperature. Diode laser radiation from 4 mW cm−2 to 3.3 W cm−2 tuned to the D2 absorption line of each isotope excites atoms into all the excited-state hyperfine levels simultaneously inside the unresolved Doppler profile. Polarization fluorescence d...
متن کاملRotational Spectrum of the AsH(2) Radical in Its Ground State, Studied by Far-Infrared Laser Magnetic Resonance.
The rotational spectrum of AsH(2) in its ground &Xtilde;(2)B(1) electronic state has been recorded using a far-infrared laser magnetic resonance spectrometer. The AsH(2) radical was produced inside the spectrometer cavity by the reaction of arsine (AsH(3)) with fluorine atoms. Hyperfine splittings from both (75)As and (1)H nuclei were observed, and analysis of the spectra has yielded accurate v...
متن کاملFiber-optic Array Spectroscopy of NH2 In Comet Hale-Bopp: Nature of the rotational energy distributions
Moderate resolution spectra of the 030 band of NH2 near 6300 Å were recorded in Comet Hale-Bopp near 2.6 and 1.0 AU with the HYDRA array spectrometer on the WIYN telescope. The spectra from beyond the collision sphere were examined with respect to the relative rotational energy distributions in NH2. The relative rotational profiles could be consistently fit at both heliocentric positions by a p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 112 16 شماره
صفحات -
تاریخ انتشار 2014