The Angular Distribution of α-particles from the Reaction ¹⁹F(pα)¹⁶O^*(π)¹⁶O

Thermonuclear 19 F(p, ${{\boldsymbol{\alpha }}}_{0}$) 16 O reaction rate

“…One or two kinds of expansion coefficients were given in the previous works, and their relation was deduced in Ref. [32]. By using these coefficients, we have plotted the factor f in Fig.…”

Spectroscopy of natural parity states in 20Ne via the 19F(p,α0) and 19F(p,απ)reactions at low energies

“…MeV, we used the differential cross section measured in Ref. [18] to calculate the integrated cross section, assuming the shapes of the angular distributions as recorded in [19]. We performed a comprehensive R-matrix analysis of the above discussed data set.…”

“…[6,11]. We also included a direct contribution to the total cross section, possibly enhanced by the cluster configuration of 19 F, as discussed in [6,20,21]. The presence of an extended data set, and the simultaneous fit of more reaction channels, allow us to refine the spectroscopy of natural-parity states in 20 Ne in the excitation energy range E x = 13-16 MeV.…”

“…The 19 F(p,α) 16 O reaction has been shown to be a particularly powerful tool to investigate the spectroscopy of the self-conjugate 20 Ne nucleus at E x > 12.884 MeV [11,12]. Additionally, starting from even very low proton bombarding energies (few hundreds of keV) a number of reaction channels are energetically open, including the 19 F(p,α π ) 16 O, where the residual 16 O nucleus is left in its first excited state (E x = 6.05 MeV) and α-group followed by γ-ray emission 19 F(p,α γ ) 16 O (having E x = 6.13, 6.92, 7.12 MeV in 16 O).…”

A proposed direct measurement of cross section at Gamow window for key reaction 19F(p,α) 16O in Asymptotic Giant Branch stars with a planned accelerator in CJPL

“…The recommended 19 F(p,α 0 ) 16 O astrophysical S (E)-factor was determined from several works [19][20][21][22][23][24][25][26][27] in the NACRE compilation [28], with the lowest energy direct data at E c.m. =461 keV [20].…”