Data on the Neutron-Neutron Scattering Length from the nd-Breakup Reaction at En=8 MeV and En=11 MeV

被引：2

作者：

Konobeevski, E. S. ^{[1
]}

Kasparov, A. A. ^{[1
]}

Mordovskoy, M. V. ^{[1
]}

Zuyev, S. V. ^{[1
]}

Potashev, S. I. ^{[1
,2
]}

Afonin, A. A. ^{[1
]}

Mitcuk, V. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[2] Russian Acad Sci, Lebedev Phys Inst, Moscow, Russia

来源：

PHYSICS OF ATOMIC NUCLEI | 2022年 / 85卷 / 03期

关键词：

RANGE;

D O I：

10.1134/S1063778822030115

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：

A kinematically complete experiment devoted to studying the nd-breakup reaction at energies of 8 and 11 MeV via detecting all three secondary particles was performed. The S-1(0) neutron-neutron (nn) scattering-length values of a(nn) = - 19.8 +/- 0.4 and - 19.0 +/- 0.5 fm at, respectively, E-n = 8 and 11 MeV were obtained from a comparison of the experimental dependence of the yield of the nd-breakup reaction on the relative energy of the nn pair with the results of a simulation. An analysis of the values obtained for the nn scattering length, together with data from other experiments, confirms the hypothesis that three-nucleon forces affect the parameters of nn interaction that are extracted from reactions involving few-nucleon systems and gives a new asymptotic nn scattering length, a(nn) = -16.1 +/- 0.1 fm.

引用

页码：289 / 295

页数：7