検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年
検索結果: 1 件中 1件目~1件目を表示
  • 1

発表形式

Initialising ...

選択項目を絞り込む

掲載資料名

Initialising ...

発表会議名

Initialising ...

筆頭著者名

Initialising ...

キーワード

Initialising ...

使用言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

選択した検索結果をダウンロード

論文

Nonresonant $$p$$-wave direct capture and interference effect observed in the $$^{16}$$O$$(n,gamma)^{17}$$O reaction

永井 泰樹*; 木下 充隆*; 井頭 政之*; 延原 由利子*; 牧井 宏之; 三島 賢二*; 嶋 達志*; Mengoni, A.*

Physical Review C, 102(4), p.044616_1 - 044616_8, 2020/10

 被引用回数:0

We measured the total capture cross section of the $$^{16}$$O$$(n,gamma)^{17}$$O reaction, as well as partial cross sections leading to the ground ($$J^{pi} = 5/2^{+})$$ and first excited ($$J^{pi} = 1/2^{+})$$ states in $$^{17}$$O. The measurement was carried out at average neutron energies of 157, 349, 398, 427, 468, 498, and 556 keV by using pulsed neutrons produced via the $$^{7}$$Li$$(p,n)^{7}$$Be reaction and a $$gamma$$-ray detection system based on an anti-Compton NaI(Tl) spectrometer. We observed the interference effect between the $$3/2^{-}$$ resonance state at 4554 keV of $$^{17}$$O, corresponding to a neutron energy of 411 keV in the center-of-mass system, and a non-resonant contribution in the capture process. The measured partial cross sections are in good agreement with theoretical calculations obtained taking into account the interference between the $$3/2^{-}$$ resonance and a non-resonant p-wave direct radiative capture contribution. Using the present results, together with our previous measurement, we derived the Maxwellian-averaged capture cross sections (MACS) for thermal energies between kT = 5 and 100 keV, key quantities for ${it s}$ process nucleosynthesis studies in massive stars.

1 件中 1件目~1件目を表示
  • 1