Measuring the (d,He-2) reaction with the focal-plane detection system of the BBS magnetic spectrometer at AGOR

F Ellinghaus, R Bassini, C Baumer, AM van den Berg, D Frekers*, D De Frenne, M Hagemann, VM Hannen, MN Harakeh, M Hartig, J Heyse, MA de Huu, E Jacobs, M Mielke, JM Schippers, R Schmidt, SY van der Werf, HJ Wortche

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

50 Citaten (Scopus)


At intermediate energies, the (d, He-2) charge-exchange reaction can be used to observe Gamow-Teller strength in the direction. He-2 denotes the two-proton system being in the singlet S-1(0) state. In the present experiment the two protons, which in the laboratory frame are emitted into the forward direction, have been momentum analyzed and detected in coincidence by the same spectrometer and detector. Protons from deuteron breakup processes can induce a large accidental coincidence background because of the much larger breakup cross-section as compared to the (d, He-2) cross-section. Nevertheless, background-free He-2 spectra with a resolution of 145 keV at an incident energy of 170 MeV are obtained, allowing the identification of many levels with high precision in the residual nuclei. The essential features of the detection system and the data-acquisition and analysis techniques which make our (d 2 He) experiments possible are described. Two nuclei, C-12 and Mg-24, have been used as a test case. (C) 2002 Elsevier Science B.V. All rights reserved.

Originele taal-2English
ArtikelnummerPII S0168-9002(01)01365-1
Pagina's (van-tot)253-261
Aantal pagina's9
TijdschriftNuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment
Nummer van het tijdschrift1-3
StatusPublished - 1-apr-2002

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