Author/Authors :
Dionisio، نويسنده , , J.S and Meunier، نويسنده , , R and Schück، نويسنده , , C and Vieu، نويسنده , , Ch and Lagrange، نويسنده , , J.M and Pautrat، نويسنده , , M and Bacelar، نويسنده , , J.C.S and Jongman، نويسنده , , J.R and Phillips، نويسنده , , W.R and Durell، نويسنده , , J.L and Urban، نويسنده , , W and Varley، نويسنده , , B.J and Folger، نويسنده , , H، نويسنده ,
Abstract :
The main features of the interplay between the target structure and the accelerated ion beam characteristics suitable for an in-beam e-γ measurement are discussed in detail. In particular, the different types of “spurious” electron (and photon) spectra overlapped with in-beam internal conversion electrons (and discrete γ-rays) are reviewed as well as the most efficient experimental methods used for their attenuation. Furthermore, the general characteristics of particle beams, targets and electron spectrometers required for prompt and delayed in-beam e, γ and e-γ measurements are also compared. Moreover, the relative magnitude of the electron line Doppler broadening corresponding to the perpendicular and the collinear geometry is briefly discussed and illustrated by a few in-beam e-γ studies of Pm and Eu isotopes produced by accelerated ions (21H and 73Li) bombarding very thin Nd(+C) backed targets. Finally the most recent developments made at Orsay towards multi e-γ detector assemblies lead to a broad discussion concerning the most suitable targets to be inserted within such instrumental arrangements.
