Ponente
Descripción
Proton and neutron removal reactions across the Be-Li chain close to the drip line have been investigated to establish the role of the Geometrical Mismatch Factor (GMF) and the Short-Range Correlations (SRC) effects [1] in lowering the cross sections, as observed previously in He-Li nuclei when compared to theoretical predictions [2] in what is widely known as the quenching of Spectroscopic Factors (SFs).
The experiment E748 was performed at GANIL using $^{10}\text{Be}$ and $^{12}\text{Be}$ beams at 30 AMeV impinging on a $\text{CD}_{2}$ target, with an intensity of $3\times 10^{5}$ and $2\times 10^{4}$ pps respectively. The light recoil's angle and energy were detected using 8 MUST2 telescopes [3], and a zero-degree detector consisting of an ionization chamber and a plastic scintillator that permitted the identification of the heavy recoil.
The missing-mass technique was used to reconstruct the excitation energy spectrum, from which cross-sections have been extracted. Particular attention has been paid to the $^{10}\text{Be}(\text{d},^{3}\text{He})^{9}\text{Li}$ and $^{12}\text{Be}(\text{d},^{3}\text{He})^{11}\text{Li}$ transfer reactions, but also to the $^{10}\text{Be}(\text{d},\text{t})^{9}\text{Be}$ channel as it enables further constraints to these two phenomena along the same isotopic chain.
This work will present preliminary results of the angular distributions for all the interesting channels, alongside a study of the aforementioned quenching factor ($R_{\text{S}}$ in the literature) by comparing experimental SFs to Shell Model calculations. The elastic channels will also be displayed as a validation mechanism of the normalization factors.
References
[1] N. K. Timofeyuk et al., J. Phys. G Nucl. Partic. 41 (2014) 094008.
[2] A. Matta et al., Phys. Rev. C 92 (2015) 041302.
[3] E. Pollacco et al., Eur. Phys. J. A 25 (2005) 287-288.
[4] F. Nunes et al., Nucl. Phys. A 609 (1996) 43-73.
