The cross sections for disorientation of magnetically oriented $6^{2}P_{\frac{1}{2}}$ cesium atoms, induced in collisions with noble gases, have been determined using Zeeman-scanning techniques at kilogauss magnetic fields. The ${m}_{J}=\ensuremath{-}\frac{1}{2}$, ${m}_{I}=\ensuremath{-}\frac{7}{2}$ hyperfine Zeeman substate was populated selectively by irradiating the cesium-vapor-noble-gas mixture with cesium-resonance radiation, and collisional transitions to the ${m}_{J}=+\frac{1}{2}$ , ${m}_{I}=\ensuremath{-}\frac{7}{2}$ substate were monitored by measurements of the relative intensities of the ${\ensuremath{\sigma}}^{\ensuremath{-}}$ and ${\ensuremath{\sigma}}^{+}$ components in resonance fluorescence observed in the direction parallel to the magnetic field. The following cross sections were obtained: Cs-He, 11.8 ${\mathrm{\AA{}}}^{2}$ ; Cs-Ne, 4.7 ${\mathrm{\AA{}}}^{2}$ ; Cs-Ar, 10.7 ${\mathrm{\AA{}}}^{2}$ ; Cs-Kr, 37.9 ${\mathrm{\AA{}}}^{2}$ ; Cs-Xe, 71.7 ${\mathrm{\AA{}}}^{2}$ .The cross sections for disorientation of magnetically oriented $6^{2}P_{\frac{1}{2}}$ cesium atoms, induced in collisions with noble gases, have been determined using Zeeman-scanning techniques at kilogauss magnetic fields. The ${m}_{J}=\ensuremath{-}\frac{1}{2}$, ${m}_{I}=\ensuremath{-}\frac{7}{2}$ hyperfine Zeeman substate was populated selectively by irradiating the cesium-vapor-noble-gas mixture with cesium-resonance radiation, and collisional transitions to the ${m}_{J}=+\frac{1}{2}$, ${m}_{I}=\ensuremath{-}\frac{7}{2}$ substate were monitored by measurements of the relative intensities of the ${\ensuremath{\sigma}}^{\ensuremath{-}}$ and ${\ensuremath{\sigma}}^{+}$ components in resonance fluorescence observed in the direction parallel to the magnetic field. The following cross sections were obtained: Cs-He, 11.8 ${\mathrm{\AA{}}}^{2}$; Cs-Ne, 4.7 ${\mathrm{\AA{}}}^{2}$; Cs-Ar, 10.7 ${\mathrm{\AA{}}}^{2}$; Cs-Kr, 37.9 ${\mathrm{\AA{}}}^{2}$; Cs-Xe, 71.7 ${\mathrm{\AA{}}}^{2}$.

Physical Review AJul 1, 197213 citations

Collisional m(J) mixing in magnetically oriented 4(2)P(3/2) potassium atoms.

T. Shiner

The mj mixing cross section for disorientation of magnetically 2 oriented potassium atoms in the 4 ^2/2 state» induced by collisions with ground state helium atoms, was measured using a modified Zeeman scanning technique.The mj substates of potassium atoms, situated in a strong magnetic field, were selectively excited and the collisionally induced mixing manifested itself by the depolarization of the potassium resonance fluorescence.The depolarization measurements yielded mixing cross -14 2 -14 2 sections ranging from 0.77 x 10 cm to 1.4 x 10 cm .It is felt that this discrepancy may be due to a selection rule for transitions between the fine structure states such that £nij = 0 is preferred.The mj mixing cross section for disorientation of magnetically 2 oriented potassium atoms in the 4 ^2/2 state» induced by collisions with ground state helium atoms, was measured using a modified Zeeman scanning technique.The mj substates of potassium atoms, situated in a strong magnetic field, were selectively excited and the collisionally induced mixing manifested itself by the depolarization of the potassium resonance fluorescence.The depolarization measurements yielded mixing cross -14 2 -14 2 sections ranging from 0.77 x 10 cm to 1.4 x 10 cm .It is felt that this discrepancy may be due to a selection rule for transitions between the fine structure states such that £nij = 0 is preferred.

Jan 1, 19670 citations

The cross sections for disorientation of magnetically oriented

6^{2}P_{\frac{1}{2}}

cesium atoms, induced in collisions with noble gases, have been determined using Zeeman-scanning techniques at kilogauss magnetic fields. The ${m}_{J}=\ensuremath{-}\frac{1}{2}$, ${m}_{I}=\ensuremath{-}\frac{7}{2}$ hyperfine Zeeman substate was populated selectively by irradiating the cesium-vapor-noble-gas mixture with cesium-resonance radiation, and collisional transitions to the

{m}_{J}=+\frac{1}{2}

, ${m}_{I}=\ensuremath{-}\frac{7}{2}$ substate were monitored by measurements of the relative intensities of the ${\ensuremath{\sigma}}^{\ensuremath{-}}$ and ${\ensuremath{\sigma}}^{+}$ components in resonance fluorescence observed in the direction parallel to the magnetic field. The following cross sections were obtained: Cs-He, 11.8

{\mathrm{\AA{}}}^{2}

; Cs-Ne, 4.7

{\mathrm{\AA{}}}^{2}

; Cs-Ar, 10.7

{\mathrm{\AA{}}}^{2}

; Cs-Kr, 37.9

{\mathrm{\AA{}}}^{2}

; Cs-Xe, 71.7

{\mathrm{\AA{}}}^{2}