The radiative lifetime of the upper state 3914 A transition N2+ was measured to be (6.58±0.35) 10—8 sec, corresponding an oscillator strength f (3.48±0.20) 10—2. apparent 3371 second positive system N2 found depend upon conditions excitation. Extrapolation excitation threshold yields a (4.45±0.6) sec.

Radiationless energy transfer between unlike molecules has been studied under conditions where the interaction described in ``Förster'' formulation may be expected to dominate other effects. Primary emphasis is placed on a direct observation of effect excited-state lifetime donor. These results are related through theory with spectroscopic measurements. Good agreement found predictions Förster based long-range (25–50 Å) dipole—dipole leading an R—6 distance dependence transition probability...

Long-range radiationless energy transfer from the triplet states of aromatic hydrocarbons to singlet fluorescent dyes (10—3 M) is used measure efficiencies dissipation (φF, φIS, φP) for triphenylene, phenanthrene, p-terphenyl, chrysene, naphthalene, and/or their deuterated counterparts. Rhodamine B, rhodamine 6G, acriflavin, and fluorescein were found be suitable acceptors. By measuring phosphorescence directly, reliable estimates T→S radiative rate constants can obtained.

Radiationless deactivation of the fluorescent state substituted anthracenes has been studied by measuring temperature dependence both triplet yield and absolute fluorescence lifetime. It is concluded that in those derivatives which show a significant variation with temperature, radiationless proceeds entirely intersystem crossing. The existence states are approximately degenerate anthracene demonstrated experimentally. A tentative explanation offered for influence substitution on behavior...

In this paper, the performance of a heat pipe based thermal management technique for batteries has been investigated experimentally. regard, test rig was developed and used to demonstrate effectiveness flat (heat mat) technology at controlling maintaining temperature prototype battery module, which consisted sixteen prismatic lithium-titanate (LTO) cells. Test results were obtained proved ability keep cells an optimal temperature, during cycling representative real-world operation, from...

An instrument to measure fluorescence lifetimes of the order millimicroseconds is described. Following excitation by a hydrogen flash lamp, observed stroboscopically with gated photomultiplier. The method gating novel and achieves time resolution comparable fast oscilloscopes (1.8×10−9 sec). data are presented in form chart record.

Confined Helium Helium-3 ( 3 He) has superfluid phases closely related to topological insulators and superconductors. In geometrical confinement, He is expected support exotic excitations, but its phase diagram largely unknown, as such measurements are experimentally challenging. Levitin et al. (p. 841 ) confine in a slab geometry of defined height use nuclear magnetic resonance probe. As predicted by theory, the authors find that confinement stabilizes some across larger portion with...

The radiative mean lifetime of the upper electronic state (B2Σ) violet system CN has been measured to be (8.5±1.)10—8 sec, corresponding an oscillator strength f=(2.7±0.3)10—2. These results include contributions, undetermined weights, from (0, 0) through (4, 4) vibrational transitions.

The time dependence of the de-excitation phosphorescent state phenanthrene-d10 by radiationless energy transfer to fluorescent rhodamine B is observed. Good agreement found with predictions based on long-range dipole—dipole interaction described Förster.

The radiative lifetime of the A 2Σ→X 2Π transition OH has been measured. apparent is dependent upon pressure parent molecule from which OH* produced by electron bombardment. Extrapolation to zero yields a spontaneous probability 0.99×106 sec—1 corresponding an oscillator strength f= (7.25±0.5) 10—4. This value assumes that electronic moment constant over (0, 0) vibrational transition. Utilizing Learner's values rotation—vibration interaction f for rotationless and band (8.0±0.8) collisional...

The radiative lifetimes of the A 2Δ and B 2Σ states CH 2II state NH have been measured to be (5.6±0.6) 10—7, (1.0±0.4) 10—6, (4.25±0.6) 10—7 sec, respectively. oscillator strengths respective ground-state transitions were then calculated (4.9±0.5) 10—3, (1.2±0.4) (8.0±1.1) 10—3.

Lithium-ion batteries are widely used in high power applications and, with more industries focusing on the electrification of their processes, need for an effective battery thermal management system is growing. The use a serves multiple purposes such as safeguarding from catastrophic runaway and increasing lifespan pack. In present paper, sixteen-cell module, by two different configurations heat pipe based system, investigated experimentally. first configuration, module fixed top single...

The radiative lifetimes (τv′) of the upper electronic state comet-tail bands CO+ have been measured. There is an appreciable variation (about 50%) τv′ with v′, vibrational quantum number. By using average τ = (2.6)10—6 sec, and frequency corresponding to 4200 A oscillator strength f (2.2±0.5)10—3 calculated. uncertainty arises largely because observed lifetime v′.

In superfluid $^3$He-B confined in a slab geometry, domain walls between regions of different order parameter orientation are predicted to be energetically stable. Formation the spatially-modulated stripe phase has been proposed. We $^3$He 1.1 $\mu$m high microfluidic cavity and cooled it into B at low pressure, where is predicted. measured surface-induced distortion with NMR, sensitive formation domains. The results rule out phase, but consistent 2D modulated order.

Cooperative optical effects are enabled and controlled by interactions between molecular dipoles, meaning that their mutual orientation is of paramount importance to, for example, superabsorbing light-harvesting antennas. Here we show how to move beyond the possibilities simple geometric tailoring, demonstrating a metallic sphere placed within ring parallel dipoles engineers an effective Hamiltonian generates “guide-sliding” states system. This allows steady-state superabsorption in noisy...

The $B$ phase of superfluid $^{3}\mathrm{He}$ is a three-dimensional time-reversal invariant topological superfluid, predicted to support gapless Majorana surface states. We confine into thin nanofluidic slab geometry. In the presence weak symmetry-breaking magnetic field, we have observed two possible states confined $^{3}\mathrm{He}\mathrm{\text{\ensuremath{-}}}B$ manifold, through small tipping angle NMR response. Large nonlinear has allowed identification order parameter these and...

The influence of confinement on the topological phases superfluid 3He is studied using torsional pendulum method. We focus phase transition between chiral A-phase and time-reversal-invariant B-phase, motivated by prediction a spatiallymodulated (stripe) at A-B boundary. confine to single 1.08 {\mu}m thick nanofluidic cavity incorporated into high-precision torsion pendulum, map diagram 0.1 5.6 bar. observe only small supercooling A-phase, in comparison bulk or when confined aerogel. This has...

We report on optical levitation experiments to probe the interaction of a nanoparticle with surface in vacuum. The observed interaction-induced effect is controllable anharmonicity particle trapping potential. reconstruct Coulomb image charge potential be perfect agreement experimental data for carrying $Q=\ensuremath{-}(11\ifmmode\pm\else\textpm\fi{}1)e$ elementary charges and compare measured electrostatic weaker dispersive forces from theory. Our results may open route new sensitive...

Abstract Interatomic Coulombic decay (ICD) is a very efficient process by which high-energy radiation redistributed between molecular systems, often producing slow electron, can be damaging to biological tissue. During ICD, an initially-ionised and highly-excited donor species undergoes transition where outer-valence electron moves lower-lying vacancy, transmitting photon with sufficient energy ionise acceptor placed close by. Traditionally the ICD has been described via ab initio quantum...

The notion that the electromagnetic field is quantized usually inferred from observations such as photoelectric effect and black-body spectrum. However accounts of quantization this are mathematically motivated begin by introducing a vector potential, followed imposition gauge allows manipulation solutions Maxwell's equations into form amenable for machinery canonical quantization. By contrast, here we quantize in less more physically way. Starting direct description what one sees...

The radiative mean lifetime of the upper electronic state (B 2Σ+) giving rise to 3541 A band N2O+ has been measured be τ = (2.6±0.2)×10—7 sec, which corresponds an oscillator strength f (3.65±0.28)×10—3. Information about emission spectrum is also presented.

Infrared absorption spectra show that the ortho isomer of a 2-(amidophenyl)-2,1,3-benzotriazole is intramolecularly hydrogen bonded. The quantum yields for fluorescence and chemical reaction are much lower than those non-hydrogen-bonded meta para isomers. To establish how bond affects response these molecules to electronic excitation, measurements were made from which rate constants all deactivation processes have been calculated. Internal conversion excited singlet ground state hundredfold...

An atom irradiated by an off-resonant laser field near a surface is expected to experience the sum of two fundamental potentials, optical potential and Casimir-Polder surface. Here, we report new nonadditive potential, namely, laser-induced which arises from correlated coupling with both quantum vacuum. We apply this result experimentally realizable scenario atomic mirror evanescent beam leaking out show that term significant for realistic experimental parameters, transforming barriers into...

We present a formula for the spectroscopically accessible level shifts and decay rates of an atom moving at arbitrary angle relative to surface. Our Markov formulation leads intuitive analytic description whereby are obtained from coefficients Heisenberg equation motion atomic flip operators but with complex Doppler-shifted (velocity-dependent) transition frequencies. results conclusively demonstrate that limiting case parallel quadratic or higher in velocity. show stronger, linear velocity...