Resonance Phenomenon in the Fast Neutron Radiative Capture Reaction for <SUP>12</SUP>C

ZHAO WeiJuan; LIU JianFeng; HUO YuKun

Chinese Physics C> 2000, Vol. 24> Issue(12) : 1137-1141

Resonance Phenomenon in the Fast Neutron Radiative Capture Reaction for ¹²C

Faculty of Physical Engineering, Zhengzhou University, Zhengzhou 450052, China2 Department of Nuclear Science, Fudan University, Shanghai 200433, China

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Abstract：
This paper researches resonance phenomenon in the fast neutron radiative capture reaction. ¹²C(n, γ₀) cross sections are calcaulated in the neutron energy range of 5-25 MeV and angular distribution is calcaulated at neutron energy 9MeV by DSD model. Reaction mechanism contains five terms: the compound nucleus capture, direct capture and semidirect capture, radiative capture in compound elastic and inelastic channels. The calculations display the pygmy resonance peak at excitation energy E_x=13MeV and the giant resonance peak at excitation energy E_x=21MeV. The calculations agree with exepermental results.

References

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Allen B J, Musgrove A R. Advance in Nuclear Physics, 1979, 10: 1292 Lone A M, Mughabghab S F. Phys. Rev., 1974, C10:4123 Bergqvist I et al. Nucl. Phys., 1986, A456:426 4 Hakansson A et al. Phys. Rev., 1990, C41:2556 5 August R A, Weller H R, Tilly D R et al. Phys. Rev., 1987, C35:3936 HUANG ZhengDe et al. Chinese Jour of Nucl. Phys., 1991, 13:977 YUAN ZhuShu et al. High Energy Phys. and Nucl. Phys. (in Chinese), 1991, 15:1086(袁竹书等.高能物理与核物理,1991,15:1086)8 HO Y K et al. Nucl. Phys., 1983, A406: 1 9 Moldauer P A. Rev. Mod. Phys., 1964, 36: 1079 10 LIU J F, HO Y K, LONE M A. Capture Gamma–Ray Spectroscopy and Related Topics, In: Raman S ed. AIP. Conf.Proc, No. 125. AIP, New York, 1984, 55111 Seyler R G, Weller H R Phys. Rev., 1979, C20:453 12 Weller H R, Roberson N R. Rev. Mod. Phys., 1980, 52:699 13 Bechetti F D, Greenless GW. Phys. Rev., 1969, 182: 1190 14 Gilbert A, Cameron A G W. Canadian Journal of Physics., 1965, 43: 1446

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ZHAO WeiJuan, LIU JianFeng and HUO YuKun. Resonance Phenomenon in the Fast Neutron Radiative Capture Reaction for ¹²C[J]. Chinese Physics C, 2000, 24(12): 1137-1141.

ZHAO WeiJuan, LIU JianFeng and HUO YuKun. Resonance Phenomenon in the Fast Neutron Radiative Capture Reaction for ¹²C[J]. Chinese Physics C, 2000, 24(12): 1137-1141. shu

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Received: 1999-11-22
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Resonance Phenomenon in the Fast Neutron Radiative Capture Reaction for ¹²C

Corresponding author: ZHAO WeiJuan,

Faculty of Physical Engineering, Zhengzhou University, Zhengzhou 450052, China2 Department of Nuclear Science, Fudan University, Shanghai 200433, China

Received Date: 1999-11-22
Accepted Date: 1900-01-01
Available Online: 2000-12-05

Abstract: This paper researches resonance phenomenon in the fast neutron radiative capture reaction. ¹²C(n, γ₀) cross sections are calcaulated in the neutron energy range of 5-25 MeV and angular distribution is calcaulated at neutron energy 9MeV by DSD model. Reaction mechanism contains five terms: the compound nucleus capture, direct capture and semidirect capture, radiative capture in compound elastic and inelastic channels. The calculations display the pygmy resonance peak at excitation energy E_x=13MeV and the giant resonance peak at excitation energy E_x=21MeV. The calculations agree with exepermental results.