dorsal/arxiv
View SchemaNon-resonant direct p- and d-wave neutron capture by 12C
| Authors | T. Kikuchi, Y. Nagai, T. S. Suzuki, T. Shima, T. Kii, M. Igashira, A. Mengoni, T. Otsuka |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9802051 |
| URL | https://arxiv.org/abs/nucl-th/9802051 |
| DOI | 10.1103/PhysRevC.57.2724 |
| Journal | Phys.Rev.C57:2724-2730,1998 |
Abstract
Discrete gamma-rays from the neutron capture state of 13C to its low-lying bound states have been measured using pulsed neutrons at En = 550 keV. The partial capture cross sections have been determined to be 1.7+/-0.5, 24.2+/-1.0, 2.0+/-0.4 and 1.0+/-0.4 microb for the ground (1/2-), first (1/2+), second (3/2-) and third (5/2+) excited states, respectively. From a comparison with theoretical predictions based on the non-resonant direct radiative capture mechanism, we could determine the spectroscopic factor for the 1/2+ state to be 0.80 +/- 0.04, free from neutron-nucleus interaction ambiguities in the continuum. In addition we have detected the contribution of the non-resonant d-wave capture component in the partial cross sections for transitions leading to the 1/2- and 3/2- states. While the s-wave capture dominates at En < 100 keV, the d-wave component turns out to be very important at higher energies. From the present investigation the 12C(n,gamma)13C reaction rate is obtained for temperatures in the range 10E+7 - 10E+10 K.
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"abstract": "Discrete gamma-rays from the neutron capture state of 13C to its low-lying\nbound states have been measured using pulsed neutrons at En = 550 keV. The\npartial capture cross sections have been determined to be 1.7+/-0.5,\n24.2+/-1.0, 2.0+/-0.4 and 1.0+/-0.4 microb for the ground (1/2-), first (1/2+),\nsecond (3/2-) and third (5/2+) excited states, respectively. From a comparison\nwith theoretical predictions based on the non-resonant direct radiative capture\nmechanism, we could determine the spectroscopic factor for the 1/2+ state to be\n0.80 +/- 0.04, free from neutron-nucleus interaction ambiguities in the\ncontinuum. In addition we have detected the contribution of the non-resonant\nd-wave capture component in the partial cross sections for transitions leading\nto the 1/2- and 3/2- states. While the s-wave capture dominates at En \u003c 100\nkeV, the d-wave component turns out to be very important at higher energies.\n From the present investigation the 12C(n,gamma)13C reaction rate is obtained\nfor temperatures in the range 10E+7 - 10E+10 K.",
"arxiv_id": "nucl-th/9802051",
"authors": [
"T. Kikuchi",
"Y. Nagai",
"T. S. Suzuki",
"T. Shima",
"T. Kii",
"M. Igashira",
"A. Mengoni",
"T. Otsuka"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.57.2724",
"journal_ref": "Phys.Rev.C57:2724-2730,1998",
"title": "Non-resonant direct p- and d-wave neutron capture by 12C",
"url": "https://arxiv.org/abs/nucl-th/9802051"
},
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