TY - JOUR
T1 - Measurement of 14N(n,p)14C cross section for kT = 25.3 keV Maxwellian neutrons using gridded ionization chamber
AU - Sanami, Toshiya
AU - Baba, Mamoru
AU - Matsuyama, Isamu
AU - Matsuyama, Shigeo
AU - Kiyosumi, Takehide
AU - Nauchi, Yasushi
AU - Hirakawa, Naohiro
PY - 1997/7/21
Y1 - 1997/7/21
N2 - We measured the 14N(n,p)14C reaction cross section for neutrons with a quasi-Maxwellian distribution of kT = 25.3 keV which is one of the key parameters for the s-process nucleosynthesis in astrophysics. Protons were detected with high efficiency using a gridded ionization chamber. We employed a thick Li target and a 1.912 MeV proton beam for neutron production, and a vacuum-evaporated melamine (C3H6N6) film as a 14N sample. The absolute cross section was determined relatively to the 6Li(n,t)α cross section by measuring the triton yield from a 6LiF film in place of melamine. Our result (1.70 ± 0.08 mb) is approximately a factor 2 larger than the value reported in an earlier direct measurement for the same Maxwellian neutron spectrum; it is consistent with results deduced from monoenergetic neutrons or inverse reaction.
AB - We measured the 14N(n,p)14C reaction cross section for neutrons with a quasi-Maxwellian distribution of kT = 25.3 keV which is one of the key parameters for the s-process nucleosynthesis in astrophysics. Protons were detected with high efficiency using a gridded ionization chamber. We employed a thick Li target and a 1.912 MeV proton beam for neutron production, and a vacuum-evaporated melamine (C3H6N6) film as a 14N sample. The absolute cross section was determined relatively to the 6Li(n,t)α cross section by measuring the triton yield from a 6LiF film in place of melamine. Our result (1.70 ± 0.08 mb) is approximately a factor 2 larger than the value reported in an earlier direct measurement for the same Maxwellian neutron spectrum; it is consistent with results deduced from monoenergetic neutrons or inverse reaction.
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U2 - 10.1016/S0168-9002(97)00698-0
DO - 10.1016/S0168-9002(97)00698-0
M3 - Article
AN - SCOPUS:0031189828
SN - 0168-9002
VL - 394
SP - 368
EP - 373
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 3
ER -