High Resolution Studies of Electron Excitation. III. Polarization near Threshold of Light from the 4D States of Helium

We have measured the polarization of the helium lines at 492.2 nm (41D-21P) and 447.2 nm (43D-23P) over an energy range of about 0.8 eV above threshold using velocity selected electrons. The measurements are free from the effects of instrumental polarization. In both cases we find that the value of...

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Veröffentlicht in:	Proc. Roy. Soc. (London), Ser. A, v. 337, no. 1610, pp. 443-450 Ser. A, v. 337, no. 1610, pp. 443-450, 1974-03, Vol.337 (1610), p.443-450
Hauptverfasser:	Heddle, D. W. O., Keesing, R. G. W., Watkins, R. D.
Format:	Artikel
Sprache:	eng
Schlagworte:	ANGULAR MOMENTUM Azimuth CONSERVATION LAWS D STATES Electron beams ELECTRON-ATOM COLLISIONS- EXCITATION ELECTRONIC STRUCTURE ELECTRONS Energy Energy value Fall lines Helium HELIUM- EMISSION SPECTRA Monochromators N60200 -Physics (Atomic & Molecular)-Atomic & Molecular Properties N60400 -Physics (Atomic & Molecular)-Collision Phenomena P STATES Parallel plates POLARIZATION RESOLUTION RESONANCE SPIN ORIENTATION Standard deviation THRESHOLD ENERGY VISIBLE RADIATION
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