Preparation of highly polarized nuclei: Observation and control of time-dependent polarization transfer from H35Cl molecular rotation to 35Cl nuclear spin

  title={Preparation of highly polarized nuclei: Observation and control of time-dependent polarization transfer from H35Cl molecular rotation to 35Cl nuclear spin},
  author={Dimitris Sofikitis and Luis Rubio-Lago and Marion R. Martin and Davida J. Ankeny Brown and Nate C.-M. Bartlett and Richard N. Zare and T. Peter Rakitzis},
  journal={Physical Review A},
We demonstrate time-dependent polarization transfer from molecular rotation to nuclear spin. The ${\mathrm{H}}^{35}\mathrm{Cl}$ $(v=2,J=1,M=1)$ state is excited with a $1.7\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{m}$ laser pulse, and then dissociated with a delayed $235\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ laser pulse to produce $^{35}\mathrm{Cl}$ atoms. Time-dependent polarizations of both $\mathrm{H}^{35}\mathrm{Cl}$ $(v=2,J=1)$ molecules and $^{35}\mathrm{Cl}(^{2}\mathrm{P}_{3∕2… 

Figures from this paper

Highly Nuclear-Spin-Polarized Deuterium Atoms from the UV Photodissociation of Deuterium Iodide.
A novel highly spin-polarized deuterium (SPD) source is reported, via the photodissociation ofdeuterium iodide at 270 nm, to investigate polarized D-T, D-^{3}He, and D-D fusion.
Optical control of ground-state atomic orbital alignment: Cl(2P3/2) atoms from HCl(v=2,J=1) photodissociation.
The total alignment of the (35)Cl((2)P(32)) photofragments from these two mechanisms was found to vary as a function of time delay between the excitation and the photolysis laser pulses, in agreement with theoretical predictions.
Sticking Probability and Reactivity of Hyperthermal O2 Molecules Impinging on CO Pre-covered Pd(100): Effect of Rotational States with K > 1
Collisional alignment in the supersonic expansion of oxygen seeded in lighter carriers allows to produce rotationally aligned beams which were used to study the sticking probability, S, and the
Time-dependent depolarization of aligned HD molecules.
The experimental data is in good agreement with the non-hierarchical calculation but not with the hierarchical calculation, as expected for this system, and the time dependence of the H and D nuclear spin polarizations is calculated.
Polarized fluorescence of jet-cooled molecular iodine
The degree of polarized fluorescence of molecular iodine 127I2 cooled in a supersonic jet under rotationally selective excitation in the electronic transition B3Π0u+-X1Σg+ has been measured and
Stereodynamical Effects by Anisotropic Intermolecular Forces
Results obtained by combining information from scattering, spectroscopic and reactivity experiments are reported on, addressing particular attention to the reactions of small atomic ions with polar neutrals for their relevance in several environments, including interstellar medium, planetary atmospheres, and laboratory plasmas.
Development of NMR: Solid‐State NMR and Materials Science, Post 1995
During the period 1995-2011 the sub-discipline of solid-state NMR grew enormously as represented by more than 30,000 publications, numerous conferences, and a burgeoning population of young
Generation of polarized particle beams at relativistic laser intensities
Abstract The acceleration of polarized electrons, positrons, protons and ions in strong laser and plasma fields is a very attractive option for obtaining polarized beams in the multi-mega-electron


Spin-Polarized Hydrogen Atoms from Molecular Photodissociation
The production of spin-polarized hydrogen atoms from the photodissociation of hydrogen chloride with circularly polarized 193-nanometer light is inferred from the measurement of the complete angular
Time-dependent polarization transfer from molecular rotation to nuclear spin
It has been proposed recently that hyperfine depolarization of selected molecular rotational states can be used to produce molecules with highly polarized nuclear spins, and formulas for two distinct
Production of highly spin-polarized atomic hydrogen and deuterium by spin-exchange optical pumping.
Atomic-hydrogen polarization as high as 2.72(6) has been observed, which is the highest polarization yet produced by this method, however, the rubidium polarization may be limited to this value due to radiation trapping at higher rubidium densities.
Probing Excited Electronic States Using Vibrationally Mediated Photolysis: Application to Hydrogen Iodide†
We measure branching ratios and anisotropy parameters for the photolysis of HI(v=2,J=0) → H + I(2P°1/2)/I(2P°3/2) over the wavelength range 297−350 nm. HI is prepared in the v = 2, J = 0
Increase in signal-to-noise ratio of > 10,000 times in liquid-state NMR
The method can be used generally for signal enhancement and reduction of measurement time in liquid-state NMR and opens up for a variety of in vitro and in vivo applications of DNP-enhanced NMR.
Control of the spin polarization of photoelectrons/photoions using short laser pulses
We present a generic pump-probe scheme to control spin polarization of photoelectrons/photoions by short laser pulses. By coherently exciting fine structure manifolds of a multi-valence-electron
Depolarization of optically prepared molecules by two randomly oriented spins
A general expression is developed for the time development of the alignment of an ensemble of isolated molecules having two random internal spins when the ensemble is optically pumped by absorption
The mechanism for the reaction of atomic chlorine with vibrationally excited methane is investigated by measurement of correlated state and scattering distributions using the method of core
Ultraviolet photodissociation of HCl in selected rovibrational states: Experiment and theory
Experimental and theoretical methods have been applied to investigate the effect of internal parent excitation on the ultraviolet photodissociation dynamics of HCl (X 1Σ+) molecules. Jet-cooled H35Cl
Highly spin-polarized atoms and molecules from rotationally state-selected molecules.
It is shown that large nuclear polarizations in isolated molecules may be created via the hyperfine interaction following excitation to selected rotational states through Photodissociation of the polarized molecules.