TWO-NEUTRON CORRELATIONS IN HALO NUCLEI VIA COULOMB BREAKUP REACTIONS

2011 ◽  
Vol 20 (04) ◽  
pp. 843-846
Author(s):  
YUMA KIKUCHI ◽  
KIYOSHI KATŌ ◽  
TAKAYUKI MYO ◽  
MASAAKI TAKASHINA ◽  
KIYOMI IKEDA
Keyword(s):  
Invariant Mass ◽  
Cross Section ◽  
Mass Spectra ◽  
Halo Nucleus ◽  
Breakup Cross Section ◽  
Halo Nuclei ◽  
Neutron Halo ◽  
Coulomb Breakup ◽  
Three Body ◽  
Invariant Mass Spectra

We investigate the three-body Coulomb breakup of a two-neutron halo nucleus, 6 He . We calculate the breakup cross section and the invariant mass spectra by using the complex-scaled solutions of the Lippmann-Schwinger equation, and discuss the relations between the structures in these observables and the n-n and α-n correlations in 6 He .

DI-NEUTRON CORRELATION IN 6He THROUGH COULOMB BREAKUP REACTIONS

2010 ◽  
Vol 25 (21n23) ◽  
pp. 1907-1910
Author(s):  
YUMA KIKUCHI ◽  
KIYOSHI KATŌ ◽  
TAKAYUKI MYO ◽  
MASAAKI TAKASHINA ◽  
KIYOMI IKEDA
Keyword(s):  
Invariant Mass ◽  
Cross Section ◽  
Mass Spectra ◽  
Halo Nucleus ◽  
Breakup Cross Section ◽  
Neutron Halo ◽  
Coulomb Breakup ◽  
Scattering States ◽  
Three Body ◽  
Invariant Mass Spectra

We investigate the three-body Coulomb breakup of a two-neutron halo nucleus, 6 He . The three-body scattering states of 6 He are described by using the Complex-scaled solutions of the Lippmann-Schwinger equation. We calculate the breakup cross section and the invariant mass spectra, and discuss the relations between the structures in these observables and the n-n and α-n correlations of 6 He .

scholarly journals Extracting the electric dipole breakup cross section of one-neutron halo nuclei from inclusive breakup observables

2014 ◽  
Vol 2014 (5) ◽  
pp. 53D03-0 ◽  
Author(s):  
K. Yoshida ◽  
T. Fukui ◽  
K. Minomo ◽  
K. Ogata
Keyword(s):  
Cross Section ◽  
Electric Dipole ◽  
Breakup Cross Section ◽  
Halo Nuclei ◽  
Neutron Halo

A correlated background in invariant mass spectra of three-body systems

2000 ◽  
Vol 673 (1-4) ◽  
pp. 143-156 ◽  
Author(s):  
C. Forssén ◽  
B. Jonson ◽  
M.V. Zhukov
Keyword(s):  
Invariant Mass ◽  
Mass Spectra ◽  
Three Body ◽  
Invariant Mass Spectra

STRUCTURE OF TWO-NEUTRON HALO NUCLEI, 11Li

2012 ◽  
Vol 21 (07) ◽  
pp. 1250066 ◽  
Author(s):  
WALEED S. HWASH ◽  
REDZUWAN YAHAYA ◽  
SHAHIDAN RADIMAN ◽  
AZNAN FAZLI ISMAIL
Keyword(s):  
Cluster Model ◽  
Halo Nucleus ◽  
Halo Nuclei ◽  
Neutron Halo ◽  
Body System ◽  
The Core ◽  
Oblate Shape ◽  
Three Body

The two-neutron halo nucleus 11 Li has been investigated in this work. Jacobi coordinates is used to describe the three-body system, using two configurations that are the T-configuration and Y-configuration. The calculations have been calculated based on a cluster model. The 11 Li nucleus is considered as three-body system core (9 Li )+n+n. The core here has been considered as a deformed core. The calculations confirmed that the core has some deformation and has an oblate shape which in turn has effects on the structure of three-body system.

scholarly journals Nucleon form factors at threshold

2019 ◽  
Vol 218 ◽  
pp. 04003
Author(s):  
Alexandr Milstein
Keyword(s):  
Invariant Mass ◽  
Cross Section ◽  
Cross Sections ◽  
Mass Spectra ◽  
Form Factors ◽  
Invariant Mass Spectrum ◽  
Nucleon Form Factors ◽  
The Cross ◽  
Good Agreement ◽  
Invariant Mass Spectra

The pp¯invariant mass spectra in the processes e+e−→ pp¯, e+e−→ nn¯, J/ψ → pp¯ω, J/ψ → pp¯ρ, and J/ψ → pp¯γ close to the pp¯is discussed. The optical potentials for NN¯pair in the superposition of S and D waves (due to tensor forces) at spin unity of the pair, as well as for NN¯pair in the S wave at spin zero of the pair, are proposed. The parameters of the potentials are obtained by fitting the cross sections of NN¯scattering together with the pp¯invariant mass spectra in e+e−→ pp¯annihilation and J/ψ decays. Good agreement with the available experimental data is achieved. Using our potential and the Green’s function approach we also describe the cross section of e+ e−→ 6π and the η’π+ π− invariant mass spectrum in the decay J/ψ → γη’π+π− in the energy region near the NN¯threshold.

STUDY OF THE PROCESS e+e-→π+π-π0 IN THE ENERGY RANGE 1.04-1.38 GEV WITH CMD-2 DETECTOR

2005 ◽  
Vol 20 (02n03) ◽  
pp. 584-586 ◽  
Author(s):  
◽  
DMITRY A. GORBACHEV
Keyword(s):  
Energy Range ◽  
Invariant Mass ◽  
Cross Section ◽  
Mass Spectra ◽  
Magnetic Detector ◽  
Measure Cross Section ◽  
Invariant Mass Spectra

The data sample of 6 pb -1 collected by Cryogenic Magnetic Detector (CMD-2) at VEPP-2M collider in the c.m. energy range 1.04-1.38 GeV have been used to measure cross section of the process e+e-→π+π-π0 and to study its dynamics. It is shown that for description of the invariant mass spectra of π+π- pairs one should take into account the ωπ0 contribution arising due to ρ-ω - interference.

Coulomb Breakup Reactions of Two-Neutron Halo Nuclei 6He and 11Li Using Complex-Scaled Solutions of the Lippmann–Schwinger Equation

2013 ◽  
Vol 54 (7-10) ◽  
pp. 1445-1448
Author(s):  
Y. Kikuchi ◽  
T. Myo ◽  
K. Katō ◽  
K. Ikeda
Keyword(s):  
Halo Nuclei ◽  
Neutron Halo ◽  
Coulomb Breakup

scholarly journals YN CORRELATIONS FROM THE STOPPED K− REACTION ON 4He

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2520-2523 ◽  
Author(s):  
T. SUZUKI ◽  
M. IIO ◽  
K. ITAHASHI ◽  
M. IWASAKI ◽  
Y. MATSUDA ◽  
...  
Keyword(s):  
Invariant Mass ◽  
Mass Spectra ◽  
Absorption Process ◽  
Isospin Dependence ◽  
First Time ◽  
Invariant Mass Spectra

We have investigated non-mesonic reactions of the stopped K− on 4 He in terms of correlations of coincident ΛN pairs. As the result, Λp and Λn branches of the two-nucleon absorption process were clearly observed in the ΛN invariant mass spectra. The spin-isospin dependence of the process was observed for the first time.

scholarly journals Impact of uncertainties of unbound 10Li on the ground state of two-neutron halo 11Li

2020 ◽  
Author(s):  
Jagit Singh ◽  
Wataru Horiuchi
Keyword(s):  
Ground State ◽  
Halo Nucleus ◽  
Transfer Reaction ◽  
Neutron Halo ◽  
Structure Model ◽  
Continuum States ◽  
Normal Core ◽  
Configuration Mixing ◽  
Three Body ◽  
Neutron Transfer Reaction

Recently, the energy spectrum of \boldsymbol{^{10}}10Li was measured upto \boldsymbol{4.6}4.6 MeV, via one-neutron transfer reaction \boldsymbol{d(^{9}\textrm{Li},~p)^{10}\textrm{Li}}𝐝(9Li,𝐩)10Li. Considering the ambiguities on the \boldsymbol{^{10}}10Li continuum spectrum with reference to new data, we report the configuration mixing in the ground state of the two-neutron halo nucleus \boldsymbol{^{11}}11Li for two different choices of the \boldsymbol{^{9}{\textrm{Li}}+n}9Li+𝐧 potential. For the present study, we employ a three-body (\boldsymbol{\textrm{core}+n+n}core+𝐧+𝐧) structure model developed for describing the two-neutron halo system by explicit coupling of unbound continuum states of the subsystem (\boldsymbol{\textrm{core}+n}core+𝐧), and discuss the two-neutron correlations in the ground state of \boldsymbol{^{11}}11Li.

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