THREE AND FOUR-BODY BREAKUP REACTIONS

2008 ◽  
Vol 17 (10) ◽  
pp. 2301-2309
Author(s):  
DANIEL BAYE
Keyword(s):  
Halo Nucleus ◽  
Radiative Capture ◽  
Halo Nuclei ◽  
Coulomb Breakup ◽  
First Order ◽  
S Factor ◽  
Reaction Models ◽  
Spectroscopic Information ◽  
Coupled Channel ◽  
First Order Perturbation

Breakup reactions provide spectroscopic information on exotic nuclei. Coulomb breakup indirectly measures the astrophysical S factor for radiative-capture reactions. The validity of first-order perturbation theory is limited for extended systems such as halo nuclei. More elaborate reaction models are necessary: semi-classical time-dependent Schrödinger equation, eikonal and dynamical eikonal approximations, continuum-discretized coupled-channel method. Breakup experiments do not provide much information on the structure of a two-cluster halo nucleus but accurate exclusive experiments should be more interesting for three-cluster nuclei.

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 .

Radiative reactions in halo effective field theory

2016 ◽  
Vol 25 (05) ◽  
pp. 1641004 ◽  
Author(s):  
Gautam Rupak
Keyword(s):  
Field Theory ◽  
Cross Section ◽  
Effective Field Theory ◽  
Halo Nucleus ◽  
Radiative Capture ◽  
Effective Field ◽  
Valence Neutron ◽  
Halo Nuclei ◽  
Radiative Reaction ◽  
Model Independent

In this article we review the recent progress in radiative reaction calculations in halo effective field theory. We look at radiative capture and breakup processes that involve a halo nucleus with a single valence neutron or proton. Looking at [Formula: see text] [Formula: see text],[Formula: see text]n[Formula: see text] and related reactions, the dominant source of theoretical uncertainty in [Formula: see text]- and [Formula: see text]-wave halo nuclei reaction calculations is quantified in a model-independent framework. The analysis for neutron halos is extended to proton halo systems. The effective field theory results quantify which observable parameters of the strong interaction at low energy need to be determined more precisely for accurate cross-section calculations.

scholarly journals From the Coulomb breakup of halo nuclei to neutron radiative capture

2016 ◽  
Author(s):  
Pierre Capel ◽  
Yvan Nollet
Keyword(s):  
Radiative Capture ◽  
Halo Nuclei ◽  
Coulomb Breakup

scholarly journals Accurate first-order perturbation theory for fluids: uf-theory

2021 ◽  
Vol 154 (4) ◽  
pp. 041102
Author(s):  
Thijs van Westen ◽  
Joachim Gross
Keyword(s):  
Perturbation Theory ◽  
Order Perturbation ◽  
Order Perturbation Theory ◽  
First Order ◽  
First Order Perturbation

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

First-Order Perturbation Analysis of Secsi With Generalized Unfoldings

2018 ◽  
Author(s):  
Yao Cheng ◽  
Sher Ali Cheema ◽  
Martin Haardt ◽  
Amir Weiss ◽  
Arie Yeredor
Keyword(s):  
Perturbation Analysis ◽  
Order Perturbation ◽  
First Order ◽  
First Order Perturbation

First-order perturbation solutions of embedded strained wires

2006 ◽  
Vol 100 (12) ◽  
pp. 123506 ◽  
Author(s):  
C.-H. Chiu ◽  
Hangyao Wang
Keyword(s):  
Order Perturbation ◽  
First Order ◽  
First Order Perturbation ◽  
Perturbation Solutions

Note on Interference Effects in Two-Step Reaction Processes

1975 ◽  
Vol 53 (23) ◽  
pp. 2590-2592
Author(s):  
J. Cejpek ◽  
J. Dobeš
Keyword(s):  
Perturbation Theory ◽  
Point Of View ◽  
Order Perturbation ◽  
Interference Effects ◽  
Qualitative Explanation ◽  
First Order ◽  
One Step ◽  
Step Transition ◽  
Reaction Processes ◽  
First Order Perturbation

The reaction processes in which a one-step transition is forbidden are analyzed from the point of view of the first order perturbation theory. The interference between two competing two-step reaction paths is found to be always constructive. A qualitative explanation of the experimentally observed reaction intensities is presented.

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