Two-neutron transfer reaction mechanisms in 12C(6He,4He)14C using a realistic three-body 6He model

被引：28

作者：

Smalley, D. ^{[1
]}

Sarazin, F. ^{[1
]}

Nunes, F. M. ^{[2
,3
]}

Brown, B. A. ^{[2
,3
]}

Adsley, P. ^{[4
]}

Al-Falou, H. ^{[5
]}

Andreoiu, C. ^{[6
]}

Baartman, B. ^{[6
]}

Ball, G. C. ^{[5
]}

Blackmon, J. C. ^{[7
]}

Boston, H. C. ^{[8
]}

Catford, W. N. ^{[9
]}

Chagnon-Lessard, S. ^{[10
]}

Chester, A. ^{[6
]}

Churchman, R. M. ^{[5
]}

Cross, D. S. ^{[6
]}

Diget, C. Aa. ^{[4
]}

Di Valentino, D. ^{[11
]}

Fox, S. P. ^{[4
]}

Fulton, B. R. ^{[4
]}

Garnsworthy, A. ^{[5
]}

Hackman, G. ^{[5
]}

Hager, U. ^{[1
]}

Kshetri, R. ^{[6
]}

Orce, J. N. ^{[5
]}

Orr, N. A. ^{[12
]}

Paul, E. ^{[8
]}

Pearson, M. ^{[5
]}

Rand, E. T. ^{[10
]}

Rees, J. ^{[8
]}

Sjue, S. ^{[5
]}

Svensson, C. E. ^{[10
]}

Tardiff, E. ^{[5
]}

Varela, A. Diaz ^{[10
]}

Williams, S. J. ^{[2
]}

Yates, S. ^{[13
]}

机构：

[1] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

[2] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[4] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[5] TRIUMF, Vancouver, BC V6T 2A3, Canada

[6] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

[7] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[8] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[9] Univ Surrey, Dept Phys, Guildford GU1 5XH, Surrey, England

[10] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[11] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada

[12] CNRS, IN2P3, LPC ENSICAEN, F-14050 Caen, France

[13] Univ Kentucky, Dept Phys, Lexington, KY 40506 USA

来源：

PHYSICAL REVIEW C | 2014年 / 89卷 / 02期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

ELASTIC-SCATTERING; C-12;

D O I：

10.1103/PhysRevC.89.024602

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The reaction mechanisms of the two-neutron transfer reaction C-12(He-6,He-4) have been studied at E-lab = 30 MeV at the TRIUMF ISAC-II facility using the Silicon Highly-segmented Array for Reactions and Coulex (SHARC) charged-particle detector array. Optical potential parameters have been extracted from the analysis of the elastic scattering angular distribution. The new potential has been applied to the study of the transfer angular distribution to the 2(2)(+) 8.32 MeV state in C-14, using a realistic three-body He-6 model and advanced shell-model calculations for the carbon structure, allowing to calculate the relative contributions of the simultaneous and sequential two-neutron transfer. The reaction model provides a good description of the 30-MeV data set and shows that the simultaneous process is the dominant transfer mechanism. Sensitivity tests of optical potential parameters show that the final results can be considerably affected by the choice of optical potentials. A reanalysis of data measured previously at E-lab = 18 MeV, however, is not as well described by the same reaction model, suggesting that one needs to include higher-order effects in the reaction mechanism.

引用

页数：9

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