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Li, T. K.; Dehnhard, D.; Brown, Ronald E.; Ellis, P.J.

doi:10.1103/physrevc.13.55

Cited by 39 publications

(30 citation statements)

References 34 publications

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“…The 5.62 MeV state had been suggested to have J π = 2 + or 3 − [29][30][31], and if this and the present level at 5.64 MeV are one and the same, the 2 + assignment is slightly favored due to the relatively large spectroscopic factors for the = 1 and 3 transfers. For example, a small (S < 0.03) population of the negative-parity states in the 17 O(d,p) 18 O reaction was observed [24]. The same conclusions may be drawn for the 4.99 MeV state; namely, the extracted spectroscopic factors suggest a positive spin-parity assignment.…”

Section: B = 2 and 0 Neutron Transferssupporting

confidence: 50%

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Experimental study of the19O(d,p)20O

et al. 2012

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The neutron-adding (d,p) reaction was carried out in inverse kinematics to investigate the single-neutron overlap with the 19 O ground state. Eight states in 20 O were populated with measurable strength and a Q-value resolution of approximately 175 keV FWHM was achieved. Cross sections, angular distributions, spectroscopic factors, and T = 1 diagonal two-body matrix elements were deduced. Results are discussed in terms of shellmodel calculations confined to the 0d 5/2 , 1s 1/2 , and 0d 3/2 orbitals.

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Section: B = 2 and 0 Neutron Transferssupporting

confidence: 50%

“…[50], and set D2 from Table I of Ref. [24]. Three sets of proton optical-model parameters were also chosen from Refs.…”

Section: Cross Sectionsmentioning

confidence: 99%

Experimental study of the19O(d,p)20O

et al. 2012

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“…Proton partial widths are either adopted from experiment (Refs. [112,187,13]) or are calculated by using the measured spectroscopic factors of the 18 O mirror states (Li et al [152]). Gamma-ray partial widths are adopted either [152].…”

Section: 24×10 −02mentioning

confidence: 99%

“…[112,187,13]) or are calculated by using the measured spectroscopic factors of the 18 O mirror states (Li et al [152]). Gamma-ray partial widths are adopted either [152]. The resulting total direct capture S-factor below E=2.5 MeV is approximately constant and amounts to S(E)=2.4×10 −3 MeV b.…”

Section: 24×10 −02mentioning

confidence: 99%

Charged-particle thermonuclear reaction rates: II. Tables and graphs of reaction rates and probability density functions

et al. 2010

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Numerical values of charged-particle thermonuclear reaction rates for nuclei in the A=14 to 40 region are tabulated. The results are obtained using a method, based on Monte Carlo techniques, that has been described in the preceding paper of this series (Paper I). We present a low rate, median rate and high rate which correspond to the 0.16, 0.50 and 0.84 quantiles, respectively, of the cumulative reaction rate distribution. The meaning of these quantities is in general different from the commonly reported, but statistically meaningless expressions, "lower limit", "nominal value" and "upper limit" of the total reaction rate. In addition, we approximate the Monte Carlo probability density function of the total reaction rate by a lognormal distribution and tabulate the lognormal parameters µ and σ at each temperature. We also provide a quantitative measure (Anderson-Darling test statistic) for the reliability of the lognormal approximation. The user can implement the approximate lognormal reaction rate probability density functions directly in a stellar model code for studies of stellar energy generation and nucleosynthesis. For each reaction, the Monte Carlo reaction rate probability density functions, together with their lognormal approximations, are displayed graphically for selected temperatures in order to provide a visual impression. Our new reaction rates are appropriate for bare nuclei in the laboratory. The nuclear physics input used to derive our reaction rates is presented in the subsequent paper of this series (Paper III). In the fourth paper of this series (Paper IV) we compare our new reaction rates to previous results.

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“…The energy of the second 1 − state was predicted to be E x = 6.652 MeV for 18 Ne and 18 O. According to our knowledge of the mirror 18 O [63], this 1 − state originates mainly from the valence hole of 1p 3/2 . The spectroscopic factors are calculated to be about S p (1p 3/2 ) = 0.01 for both proton decays to the ground and the first excited states in 17 F. The calculated value of S is about three times smaller than the experimental one [63] in 18 O.…”

mentioning

confidence: 97%

Examination of the role of theO14(α,p)F17reac

Parikh

et al. 2014

Phys. Rev. C

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The 14 O(α,p) 17 F reaction is one of the key reactions involved in the breakout from the hot-CNO cycle to the rp-process in type-I x-ray bursts (XRBs). The resonant properties in the compound nucleus 18 Ne have been investigated through resonant elastic scattering of 17 F+p. The radioactive 17 F beam was separated by the Center for Nuclear Study radioactive ion beam separator (CRIB) and bombarded a thick H 2 gas target at 3.6 MeV/nucleon. The recoiling light particles were measured by three E-E silicon telescopes at laboratory angles of θ lab ≈3 • , 10 • , and 18 • . Five resonances at E x = 6.15, 6.28, 6.35, 6.85, and 7.05 MeV were observed in the excitation functions, and their spin-parities have been determined based on an R-matrix analysis. In particular, J π = 1 − was firmly assigned to the 6.15-MeV state which dominates the thermonuclear 14 O(α,p) 17 F rate below 2 GK. As well, a possible new excited state in 18 Ne was observed at E x = 6.85 ± 0.11 MeV with tentative J = 0 assignment. This state could be the analog state of the 6.880 MeV (0 − ) level in the mirror nucleus 18 O, or a bandhead state (0 + ) of the six-particle four-hole (6p-4h) band. A new thermonuclear 14 O(α,p) 17 F rate has been determined, and the astrophysical impact of multiple recent rates has been examined using an XRB model. Contrary to previous expectations, we find only a modest impact on predicted nuclear energy generation rates from using reaction rates differing by up to several orders of magnitude.

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Investigation of the(d52)2and (

Cited by 39 publications

References 34 publications

Experimental study of the19O(d,p)20O

Experimental study of the19O(d,p)20O

Charged-particle thermonuclear reaction rates: II. Tables and graphs of reaction rates and probability density functions

Examination of the role of theO14(α,p)F17reac

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