Development of a low-level setup for gamma spectroscopy: Application for nuclear astrophysics using reverse kinematics

G. Genard, V.E. Nuttens, V. Bouchat, G. Terwagne

    Research output: Contribution to journalArticlepeer-review


    It is more and more necessary to improve the sensitivity of gamma-ray spectroscopy systems, especially in nuclear astrophysics. In the case of radiative proton capture reactions, one means is to avoid the reactions on the target impurities by using reverse kinematics. This technique is possible with the LARN accelerator and can provide very clean cross-section measurements. For that purpose, a hydrogen standard has been carried out by means of ion implantation in silicon. In addition, a low-level setup has been put in place on a new beam line of the accelerator. A high efficiency and high resolution germanium detector is used conjointly with a double shielding. A passive lead castle shielding system is used to reduce the natural radioactivity and an active shielding consisting of an anti-cosmic veto is provided by an anticoincidence between the plastic scintillator and the gamma-ray detector. The setup allows a reduction of 70% of the background interference and provides an approximately 200 fold sensitivity gain of between 600 and 3000 keV. Some other developments have also been carried out to optimize the setup. The entire setup and the reverse kinematics have been validated by measuring the cross-section of the C(p,γ)N and N(p,γ)O reactions that present some astrophysical interest.
    Original languageEnglish
    Pages (from-to)1523-1528
    Number of pages6
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Issue number9
    Publication statusPublished - 1 May 2010


    Dive into the research topics of 'Development of a low-level setup for gamma spectroscopy: Application for nuclear astrophysics using reverse kinematics'. Together they form a unique fingerprint.

    Cite this