Spectral stabilization of amplified pulses from synchronously-pumped dye laser systems

We demonstrate an effective scheme for passively stabilizing the single shot spectrum of the amplified pulses from a synchronously pumped dye laser system. This scheme is easy to implement and inexpensive. Data from resonant and nonresonant coherent transient experiments are shown to illustrate its effectiveness.     

Stoichiometry and impurity concentration in synthetically grown iron pyrite crystals and their constituents

Summary The iron to sulfur ratio in different synthetic iron pyrite samples, prepared as powders and crystals, was measured by means of ICP-AES (Inductively Coupled Plasma with Atomic Emission Spectrometry). A remarkably high sulfur deficiency in single crystals grown by chemical vapor transport has been established which leads to the gross formula FeS_2–xfor 0.242, Te) and the quartz container material (Si, O). The advantage of the ICP-methods is the direct employment of the samples after a dissolution process without further preparation steps.

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Stöchiometrie und Verunreinigungskonzentration in synthetisch gewachsenen Eisenpyrit-Kristallen und ihren Ausgangsstoffen

     

Charge transfer prior to fusion

Zeitschrift für Physik A Hadrons and nuclei - In reactions between very asymmetric projectile-target systems charge is preferably transferred from the lighter to the heavier nucleus. This...     

Off-shell NN annihilation studied in π+p interactions at 8 and 16 GeV/c

Interactions in which the baryon is emitted forwards in the c.m.s. are studied in 8 and 16 GeV/cπ⁺p collisions. These interactions are interpreted as representing baryon exchange. The properties of such off-shell $\text{N}$N annihilation events are studied. It is found that the multiplicity distribution of the multi-pion system as a function of the effective mass for events with |u_pp| < 1 GeV² is the same as for real $\text{N}\text{N}$ annihilations.     

Spontaneous Raman scattering in atomic thallium vapor

Using a cw argon-ion laser, we have measured the spontaneous Raman scattering cross section, σ_R, and linewidth in atomic thallium vapor. For 4880-Å excitation, σ_R = 1.6 × 10^?27 cm². We observe no pressure broadening of the Raman line at vapor pressures to 100 torr.     

A search for central lateral inhibition

A central spectrum explanation of the existence of the binaural edge pitch [Klein and Hartmann, J. Acoust. Soc. Am. 70, 51-61 (1981)] appears to require central lateral inhibition in the human auditory system. We have looked for this effect in central masking experiments. Using the binaural-edge noise, which creates the binaural edge pitch, as a masker (in standard notation: No below and N pi above a phase boundary frequency), we measured pulsation thresholds for sine tones in two frequency ranges where the binaural edge pitch exists. We also obtained reference data, using the same pulsation threshold technique, for standard binaural conditions NoSo, NoS pi, N pi So, and N pi S pi. These data revealed masking level differences. Theoretically the difference between the binaural-edge thresholds and the reference data should show the peak and valley signature of lateral inhibition. No such structure was found. We suggest that this negative result does not exclude the possibility of central lateral inhibition, but that the time course of central lateral inhibition makes the pulsation threshold technique an inappropriate means for observing the effect.