Preliminary Study of Two-Neutron States via the (O-18,O-16) Reaction at 84 MeV

doi:10.1063/1.3628385

	Preliminary Study of Two-Neutron States via the (O-18,O-16) Reaction at 84 MeV
	Cavallaro, M.1; Cappuzzello, F.1,2; Carbone, D.1,2; Cunsolo, A.1,2; Foti, A.1,2,3; Tudisco, S.1; Bondi, M.1,2; Santagati, G.1; Taranto, G.1; Chen, R.1,2,4
	2011
关键词	Heavy Ions Transfer Reactions Pairing correlations
卷号	1377
DOI	10.1063/1.3628385
页码	234-238
英文摘要	A study of light neutron-rich nuclei has been performed at the INFN-LNS laboratory in Catania (Italy) by the (O-18,O-16) reaction at 84 MeV incident energy on Be-9, B-11 and C-13 targets. The O-16 ejectiles have been momentum analyzed and detected at forward angles by the MAGNEX magnetic spectrometer. The energy spectra of C-15 show several known low lying states up to about 7 MeV excitation energy and unknown resonant structures at higher excitation energy. The strong excitation of these latter together with the measured width of about 2 MeV FWHM could indicate the presence of collective modes of excitation connected to the transfer of a correlated neutron pair. Also considerations regarding the reaction mechanism and the nuclei involved in the transfer seem to confirm such a conclusion. Similar features characterize the energy spectra of the Be-11 and B-13 nuclei. The achieved mass resolution (about 1/160) guarantying the identification of the reaction products corresponding to different reaction channels has allowed to study the relative yields for the different reaction channels. The measured yields show an enhancement of the two-neutron transfer channel compared to the one-neutron transfer. This result seems to indicate that the (O-18, O-16) reaction proceeds mainly by the direct transfer of the neutron pair and that the second order processes are negligible.
会议录	FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS (FINUSTAR 3)
会议录出版者	AMER INST PHYSICS
会议录出版地	2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
语种	英语
WOS研究方向	Astronomy & Astrophysics ; Physics
WOS记录号	WOS:000302905800037
内容类型	会议论文
源URL	[http://119.78.100.186/handle/113462/57337]
专题	中国科学院近代物理研究所
通讯作者	Cavallaro, M.
作者单位	1.Ist Nazl Fis Nucl, Lab Nazl Sud, I-95129 Catania, Italy 2.Universita Stud Catania, Dipartimento Fis Astron, Catania, Italy 3.Inst Nazl Fis Nucl, Catania, Italy 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China 5.Univ Fed Fluminense, Inst Fis, Rio De Janeiro, Brazil 6.Inst Phys Nucl Orsay, CNRS IN2P3, Orsay, France
推荐引用方式 GB/T 7714	Cavallaro, M.,Cappuzzello, F.,Carbone, D.,et al. Preliminary Study of Two-Neutron States via the (O-18,O-16) Reaction at 84 MeV[C]. 见:.