Figure 1

(Color online) (a) The $\mathrm{H}\mathrm{Cl}∕\mathrm{He}$ mixture is expanded with a pulsed value (PV) at $20\mathrm{Hz}$ into the extraction region of the time-of-flight mass spectrometer, and intersected with the circularly-polarized, focused pump and probe laser beams. The extraction and detection regions are pumped with diffusion pumps (DPs) to pressures of about ${10}^{-5}$ and ${10}^{-7}\text{Torr}$, respectively. Following HCl photodissociation and Cl ionization, the ions are detected with mass and velocity sensitivity with microchannel plates (MCP). (b) Detection of $\mathrm{Cl}\left({}^2\mathrm{P}_{3∕2}\right)$ atoms via $2+1$ REMPI using left circularly polarized light at $234.63\mathrm{nm}$. $M$-state selection rules and the choice of the intermediate state allows only the $M_{J_{\mathrm{Cl}}}=-3∕2$ state to be detected for left circularly polarized light.Reuse & Permissions

Figure 2

The signal ratio $\mathrm{R}=[\mathrm{I}\left(\mathrm{L}\right)-\mathrm{I}\left(\mathrm{R}\right)]∕[\mathrm{I}\left(\mathrm{L}\right)+\mathrm{I}\left(\mathrm{R}\right)]$ as a function of pump-probe time delay using left (L) and right (R) circularly polarized probe light for (a) HCl $(v=2,J=1)$ molecules detected at $250.70\mathrm{nm}$, and (b) $\mathrm{Cl}\left({}^2\mathrm{P}_{3∕2}\right)$ atoms detected at $234.63\mathrm{nm}$. Data are plotted along with theoretical predictions in both cases (see text). The error bars are $2\sigma$.Reuse & Permissions

Figure 3

Plots of the time-dependent m-state expectation values $⟨M_{J_{\mathrm{H}\mathrm{Cl}}}\left(t\right)⟩$ and $⟨M_{I_{\mathrm{Cl}}}\left(t\right)⟩$ for the HCL $(v=2,J=1)$ state (open circles) and the $\mathrm{Cl}\left({}^2\mathrm{P}_{3∕2}\right)$ atoms (solid circles), produced by transforming the raw data from Fig. 2 (see text). Theoretical predictions correspond to the $⟨M_{J_{\mathrm{H}\mathrm{Cl}}}\left(t\right)⟩=G^{\left(1\right)}\left(t\right)$ (dashed line) and $⟨M_{I_{\mathrm{Cl}}}\left(t\right)⟩=\sqrt{15∕8}{H}^{\left(1\right)}\left(t\right)$ (solid line) polarization factors. Notice that $⟨M_{J_{\mathrm{H}\mathrm{Cl}}}\left(t\right)⟩+⟨M_{I_{\mathrm{Cl}}}\left(t\right)⟩=1$ (dotted line), showing the conservation of angular momentum projection.Reuse & Permissions