First experimental constraint of the spectroscopic amplitudes for the α-cluster in the 11B ground state

New Determination of the 12C(α, γ)16O Reaction Rate and Its Impact on the Black-hole Mass Gap

“…angular distribution was performed at the HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE) in Beijing, China. The experimental setup and procedures are similar to those previously reported (Guo et al 2012(Guo et al , 2014Shen et al 2019aShen et al , 2019b. As shown in Figure 1, the experimental setup is a typical one for a high-energy transfer measurement performed using the Q3D magnetic spectrograph at the HI-13 tandem accelerator.…”

“…The binding OMP parameters for the 11 B(= α+ 7 Li) were taken from our previous study (Shen et al 2019b), in which the 7 Li( 6 Li, d) 11 B angular distribution was measured, and the binding parameters were calculated using the same technique as stated above. The binding OMP parameters for the 16 O(= α+ 12 C) were extracted by fitting the 12 C( 11 B, 7 Li) 16 O g.s.…”

Deep Underground Laboratory Measurement of C13(α,n)OGao1, Jiao2, Li3 et al. 2022Phys. Rev. Lett.Self Cite190201View full textAdd to dashboardCite

“…By placing 35-cm thick 7% borated polyethylene blocks and 1-mm thick cadmium sheets around the detection array, a background of 4.7(2) events/hour was achieved, compared to 1238 (11) events/hour measured on the Earth's surface. The detection efficiency of the array was determined to be 26% for 2.5-MeV neutrons using the 51 V(p,n) 51 Cr reaction together with Geant4 simulations [35].…”

An indirect technique in nuclear astrophysics: alpha-cluster transfer reaction

“…This is because the 16 O GS ANC is crucial for restricting the GS external capture in the 12 C(α, γ) 16 O reaction, as well as for studying astrophysical reactions as a powerful tool. As for the 20 Ne GS ANC, although Motobayashi et al [16] presented the first experimental determination through the elastic transfer reaction 20 Ne( 16 O, 20 Ne) 16 O using ΔE-E silicon detector telescope, it is still necessary to perform high-precision measurement of the 20 Ne GS ANC because of its potential application to astrophysical reactions.…”

“…The two-dimensional position information enables the products emitted into the acceptable solid angle to be completely recorded, and the energy information was used to remove the impurities with the same magnetic rigidity, as discussed in Refs. [9,15,20]. Typically the Q3D magnetic spectrograph has an energy resolution of 0.02% and an angular resolution of 0.1 degree, which makes it possible to resolve the closely spaced states which cannot be achieved only by silicon detectors, and to obtain high-precision data of angular distributions at forward angles where direct mechanism dominates.…”