Differential cross section for the 16O(t, p)18O reaction and determination of the size of the two-neutron periphery in the 18O nucleus

被引:0
作者
Galanina, L. I. [1 ]
Zelenskaya, N. S. [1 ]
机构
[1] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
关键词
SPATIAL PERIPHERY; EXCITED-STATES; 3-BODY MODEL; LIGHT-NUCLEI; ISOTOPES; LI-11;
D O I
10.1134/S1063778817050088
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
Within the theoretical formalism that combines a four-body problem with themultiparticle shell model, it is shown that the cross section for the dineuteron-stripping mechanism is consistent with the experimental angular distribution of protons from the O-16(t, p)O-18 reaction. This makes it possible to find the wave function for the relative motion of the dineutron and O-16 and to obtain thereby the probability density W(r) for the dineutron in O-18, the nn-O-16 interaction potential, and the root-mean-square distance aOE (c) L > (nn) between the dineutron and O-16. The respective calculations reveal that, at r ae 8 fm, the dineutron probability density and a rather deep nn-O-16 potential become negligible, which leads to the absence of a dineuntron periphery in O-18. It seems that one can explain this fact by a rather large value (12.19 MeV) of the dineutron binding energy in this nucleus. Thus, the O-18 nucleus is quite compact an object, despite the excess of two neutrons, and has a neutron skin rather than a periphery.
引用
收藏
页码:952 / 956
页数:5
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