Neutron-upscattering enhancement of the triple-alpha process.
Neutron-upscattering enhancement of the triple-alpha process.
复制标题
三α过程的中子上散射增强。
DOI:
10.1038/s41467-022-29848-7
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发表时间:
2022-04-20
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
The neutron inelastic scattering of carbon-12, populating the Hoyle state, is a reaction of interest for the triple-alpha process. The inverse process (neutron upscattering) can enhance the Hoyle state’s decay rate to the bound states of 12C, effectively increasing the overall triple-alpha reaction rate. The cross section of this reaction is impossible to measure experimentally but has been determined here at astrophysically-relevant energies using detailed balance. Using a highly-collimated monoenergetic beam, here we measure neutrons incident on the Texas Active Target Time Projection Chamber (TexAT TPC) filled with CO2 gas, we measure the 3α-particles (arising from the decay of the Hoyle state following inelastic scattering) and a cross section is extracted. Here we show the neutron-upscattering enhancement is observed to be much smaller than previously expected. The importance of the neutron-upscattering enhancement may therefore not be significant aside from in very particular astrophysical sites (e.g. neutron star mergers). The triple-alpha process plays a role in nucleosynthesis, in the formation of 12C. Here, the authors discuss the rate and role of the neutron upscattering phenomenon on the triple-alpha process in a multi-step process.
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影响因子:
64.8
作者:
Jin, Shilun;Roberts, Luke F.;Schatz, Hendrik
通讯作者:
Schatz, Hendrik
DOI:
10.1016/j.nima.2020.163773
发表时间:
2020-06-01
影响因子:
1.4
作者:
Bishop, J.;Rogachev, G. V.;Upadhyayula, S.
通讯作者:
Upadhyayula, S.
影响因子:
--
作者:
SHAW, PB;CLAYTON, DD
通讯作者:
CLAYTON, DD
DOI:
10.1016/j.nima.2020.163398
发表时间:
2020-03-21
影响因子:
1.4
作者:
Koshchiy, E.;Rogachev, G., V;Upadhyayula, S.
通讯作者:
Upadhyayula, S.
影响因子:
3.7
作者:
Brown, D. A.;Chadwick, M. B.;Zhu, Y.
通讯作者:
Zhu, Y.