Accurate determination of the 13C-12C+n spectroscopic factor

Stellar reaction rate forMg22+p→Al-Abdullah1, Cârstoiu2, Chen3 et al. 2010Phys. Rev. C263160View full textAdd to dashboardCite

“…), 12 C(d,p) 13 C(g.s.), 13 C(d,t) 12 C, 13 C( 12 C, 13 C) 12 C, and 12 C( 13 C, 12 C) 13 C reactions (where g.s. stands for ground state) has an average value of C 2 p 1/2 = 2.40 ± 0.12 fm −1 [20,21]. This value is in good agreement with the value obtained in this experiment, but a more precise value for the ANC is obtained by calculating the weighted average of all the measurements.…”

“…Moreover, the enrichment of 22 Ne in the so-called "Ne-E meteorites," which contain grains that might be partially condensed in nova outbursts, provides evidence of the pre-existence of sodium isotopes, namely 22 Na [5,6]. Taken all together, the above observations support the theory that the H-burning sequence of reactions can yield substantial concentrations of 22 Na in ONe novae, which is produced in the thermonuclear runaway during the high-temperature stage of the burning region mainly through the reaction chain 20 Ne(p,γ ) 21 Na(p,γ ) 22 Mg(β + ν) 22 Na. Then the radioactive 22 Na becomes a stalling point because of its slow decay rate to 22 Ne via the reaction 22 Na → 22 Ne + β + + ν.…”

“…Its measured excitation energy is 0.528(19) MeV [44], and with the new 23 Al mass from Ref. [17], the resonance energy becomes E r = 0.385 (20) MeV. The proton width of this resonance is much greater than the γ width, so the strength of the resonance is proportional to γ .…”

“…The ANC for the ground state of 13 C has been obtained in several previous works using exchange, (d,p), and (d,t) reactions in direct and inverse kinematics (see Refs. [20,21]). We have performed a complementary study of the neutron-exchange reaction 13 C( 12 C, 13 C) 12 C, also reported in this article.…”

Asymptotic normalization coefficients for mirror virtual nucleon decays in a microscopic cluster model

“…For this reason, the two-cluster model gives larger ANCs, and spectroscopic factors for 13 C and 13 N, than the four-cluster model. Several experimental values for the neutron ANC of 13 C are available [20,23,24,25,26,27]. Apart from the latest value from Ref.…”