Observation and characterisation of the fluorescence decay of the
2s2p6(2S)np 1Po excited states of Ne

P. Lablanquie1, F. Penent2, R.I. Hall2, J.H.D. Eland3, L. Avaldi4, R.
Camilloni4, S. Stranges5 and M. Coreno6 , K.C. Prince7, P. Bolognesi8,
D. Cooper8,  G.C. King8, A. Muehleisen9 and M. Zitnik9

1LURE, Universit=E9 Paris-Sud, BP34, 91898 Orsay, France.
2DIAM, Universit=E9 P.M Curie, 75252 Paris Cx 05, France.
3PTCL, Oxford University, Oxford OX1 3QZ, UK.
4IMAI del CNR, 00016 Montelibretti, Rome, Italy.
5Dipartimento di Chimica, Universita degli Studi di Roma, 00185 Rome,
Italy. 6INFM TASC Lab., Trieste, Italy.
7Sincrotrone Trieste, 34012 Trieste, Italy.
8Physics Dept, University of Manchester, Manchester M19 9PL, UK.
9J. Stefan Institute, Jamova 39,  SI-1000 Ljubljana, Slovenia

Fluorescence decay of the 2s2p6(2S)np 1Po excited states of neon has
been observed indirectly by threshold electron spectroscopy and directly
by (electron, fluorescence photon) coincidence spectroscopy. The
observation of this minor decay channel has been achieved through the
high efficiency and resolution of the threshold measurements combined
with the high resolution and flux of the gas phase beam line at the
Elettra Storage Ring.