Halo Properties of the First1/2+State inF17

Radiative p 16O Capture at Astrophyiscal Energies

“…Experimental data on excitation functions are from [35,[37][38][39]. Our results are in a good agreement with obtained earlier phase shifts from [26,30] that are shown in Figure 1 by squares and rhombs at energies above 1.5 MeV.…”

“…(4) from 2 P scattering waves with potentials of zero depth in comparison with experimental data are shown in Figure 2 by the green solid line. The measurement results of the total cross sections in the range from 0.4 to 2.5 MeV [37] are shown by black squares, and circles are data from [50] at 0.5 -2.5 MeV. Triangles show results of work [45], which lead to S-factor at zero energy of 0.4 keVb.…”

“…O scattering phase shifts, obtained in this work on the basis of the excitation functions at angles more than 120. Experimental data are from [35,[37][38][39]. Open rhombs and squares are results of the analysis at energies from 1.5 MeV to 2.5 MeV [26,30].…”

“…For carrying out the calculations of the radiative capture in the frame of the MPCM it is necessary to know potentials of the p 16 O elastic scattering in the 2 P waves, and also interactions of the 2 D 5/2 ground state and the 2 S 1/2 first excited, but bound in the p 16 O channel, state of 17 F. There are experimental data for total cross sections of the radiative capture exactly for the transition to these BSs that were measured in [37,50]. Let us consider further the Е1 transitions to the GS and FES and present the potentials of 17 F in the p 16 O channel too, since the phase shift value at energies from 0.5 to 2.5 MeV is known for the 2 S wave.…”

Elastic scattering of the proton drip-line nucleusF17

“…These measurements have prompted interest in the determination of reliable opticalmodel potentials for 17 F. The proton radiative capture reaction 16 O(p, γ ) 17 F has been measured at stellar energies by Morlock et al [10]. The extracted astrophysical S factors are in excellent agreement with those obtained with the asymptotic normalization coefficient (ANC) method by use of the transfer reaction 16 O( 3 He,d) 17 F by Gagliardi et al [11], and the halo properties of the first excited state (J π = 1/2 + , E x = 495 keV) were well established.…”