TY - JOUR
T1 - 12C(p, n)12N and 16O(p, n)16F reactions at Ep = 35 and 40 MeV
T2 - Reliability of the information obtained from DWBA analysis of low-energy (p, n) data
AU - Ohnuma, H.
AU - Kabasawa, M.
AU - Furukawa, K.
AU - Kawamura, T.
AU - Takahashi, Y.
AU - Satoh, A.
AU - Nakagawa, T.
AU - Maeda, K.
AU - Miura, K.
AU - Niizeki, T.
AU - Orihara, H.
N1 - Funding Information:
We would like to thank B.A. Brown and K. Muto for helpful discussions. This work is partially supported by the US-Japan collaboration program of Japan Society
Funding Information:
for Promotion of Science and the National Science Foundation, and by a Grant-in-Aid for Scientific Research, No. 59540147,f rom the Ministry of Education.
PY - 1987/5/25
Y1 - 1987/5/25
N2 - A high-resolution study of the 12C(p, n)12N and 16O(p, n)16F reactions was made at Ep = 35 and 40 MeV. The low-lying states in 12N(1+, 2+ and 2-) and in 16F(0-, 1-, 2- and 3-) were clearly resolved, and their angular distributions were measured. Extensive DWBA analysis was made and compared with the data. The calculated angular distribution shapes are found to be in agreement with the data and insensitive to the choice of the parameters involved. On the other hand, the magnitudes of the DWBA cross sections depend strongly on the bound state parameters in the case of a transition from a tightly bound state to a loosley bound state. In the other cases the overall uncertainty of the DWBA cross section magnitudes was estimated to be about ±30%. Within this uncertainty the experimental cross sections for the 12C(p, n) reaction were explained by the calculation, but those for the 16O(p, n) reaction were not: the observed strengths were about a half of the calculated values. Since these results agree with those at intermediate energies, the origin of the discrepancy is considered to be in the structure of the mass 16 nuclei rather than in reaction dynamics. In general, the present results compare well with those at intermediate energies, indicating that the structure information extracted from low-energy, high-resolution (p, n) data is basically sound if careful analysis of the data is made.
AB - A high-resolution study of the 12C(p, n)12N and 16O(p, n)16F reactions was made at Ep = 35 and 40 MeV. The low-lying states in 12N(1+, 2+ and 2-) and in 16F(0-, 1-, 2- and 3-) were clearly resolved, and their angular distributions were measured. Extensive DWBA analysis was made and compared with the data. The calculated angular distribution shapes are found to be in agreement with the data and insensitive to the choice of the parameters involved. On the other hand, the magnitudes of the DWBA cross sections depend strongly on the bound state parameters in the case of a transition from a tightly bound state to a loosley bound state. In the other cases the overall uncertainty of the DWBA cross section magnitudes was estimated to be about ±30%. Within this uncertainty the experimental cross sections for the 12C(p, n) reaction were explained by the calculation, but those for the 16O(p, n) reaction were not: the observed strengths were about a half of the calculated values. Since these results agree with those at intermediate energies, the origin of the discrepancy is considered to be in the structure of the mass 16 nuclei rather than in reaction dynamics. In general, the present results compare well with those at intermediate energies, indicating that the structure information extracted from low-energy, high-resolution (p, n) data is basically sound if careful analysis of the data is made.
KW - Nuclear reactions
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U2 - 10.1016/0375-9474(87)90328-9
DO - 10.1016/0375-9474(87)90328-9
M3 - Article
AN - SCOPUS:0001856601
SN - 0375-9474
VL - 467
SP - 61
EP - 78
JO - Nuclear Physics A
JF - Nuclear Physics A
IS - 1
ER -