• help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Return to the previous page

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

Nagai, Yasuki*; Kinoshita, Mitsutaka*; Igashira, Masayuki*; Nobuhara, Yuriko*; Makii, Hiroyuki   ; Mishima, Kenji*; Shima, Tatsushi*; Mengoni, A.*

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.

Language

 :

English

Journal

 :

Physical Review C

Volume

 :

102

Number

 :

4

Pages

 :

p.044616_1 - 044616_8

Publication Year/Month

 :

2020/10

Meeting title

 :

Held date

 :

Location (city)

 :

Location (country)

 :

Patent information

 :

PDF

 :


Paper URL

 :

https://doi.org/10.1103/PhysRevC.102.044616

DOI for research data

 :

Keywords

 :

no keyword

Research Facility

 :

Press Release

 :

Article of JAEA R&D Review

 :

Cooperating Institute

 :

Accesses

 :

- Accesses

InCites™

 :

Percentile:45.12

Category:Physics, Nuclear

Altmetrics

 :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.

Return to the previous page