The thick target inverse kinematics technique with a large acceptance silicon detector array

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Walshe, J.^1 ; Freer, M.^1 ; Wheldon, C.^1 ; Achouri, L.N.^2 ; Ashwood, N.I.^1 ; Catford, W.N.^3 ; Celik, I.C.^3 ; Curtis, N.^1 ; Delaunay, F.^2 ; Fernández-Domínguez, B.^4 ; Grassi, L.^5 ; Kokalova, Tz^1 ; Marqués, M.^2 ; Orr, N.A.^2 ; Prepolec, L.^5 ; Scuderi, V.^6 ; Soi, N.^5 ; Toki, V.^5

School of Physics and Astronomy, University of Birmingham, Birmingham

B15 2TT, United Kingdom^1

Laboratoire de Physique Corpusculaire de Caen, 6 bd Marechal Juin, Caen

14050, France^2

Department of Physics, University of Surrey, Guildford, Surrey

GU2 7XH, United Kingdom^3

Universidade de Santiago de Compostela, Santiago de Compostela

15782, Spain^4

Institut Ruder Bokovi, Bijenika cesta 54, Zagreb

10000, Croatia^5

INFN-Laboratori Nazionali Del Sud, via S.Sofia 62, Catania

95125, Italy^6

关键词: Centre of mass;    Detector efficiency;    Direct measurement;    Dominant contributions;    Entrance window;    Experimental techniques;    Inverse kinematics techniques;    Silicon detector arrays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012052/pdf
DOI  :  10.1088/1742-6596/569/1/012052

来源: IOP

【 摘 要 】

An experimental technique for studying elastic scattering using a thick gas target is described, with a measurement of the α(24Ne,α) reaction used as an example. Advantages such as ease, detector efficiency, and the possibility of measuring the cross section at 180° in the centre-of-mass are discussed. It is shown that a resolution of tens of keV is practical at zero degrees, and that the dominant contribution to the resolution for large angles is angular straggling of the beam in the entrance window. The use of helium gas as the target allows direct measurement of a-cluster states.