Evidence for three-body forces in p–d breakup at 25 MeV?

1990 ◽  
Vol 68 (10) ◽  
pp. 1200-1202
Author(s):  
W. B. Wango ◽  
J. Birchall ◽  
J. S. C. McKee ◽  
J. P. Svenne
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Breakup Cross Section ◽  
Deuteron Breakup ◽  
Body Forces ◽  
Paris Potential ◽  
Three Body

Experimental data for deuteron breakup by protons in collinear geometry at 25.00 MeV are compared with the predictions of rigorous Faddeev calculations using the Paris potential and with those of the Doleschall code. The Paris potential significantly underdetermines the breakup cross section in collinear geometry. The explanation for this discrepancy is not entirely clear at this time.

scholarly journals Spin observables of (d,p) reactions off $^{12}$C within the Paris potential

2019 ◽  
Vol 128 (1D) ◽  
Author(s):  
Hào Viết Nhân Trần ◽  
Nguyên Khắc Hồ ◽  
Vinh Nguyễn Thành Phạm
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Satisfactory Agreement ◽  
Analyzing Powers ◽  
Spin Observables ◽  
Paris Potential ◽  
Rank One ◽  
Three Body

Deuteron elastic scattering off $^{12}$C is described in the framework of three-body Faddeev-type equations. Analyzing powers are calculated using the PEST16 potential which is a separable rank-one representation of the Paris potential. Satisfactory agreement with the experimental data is found.

DETERMINATION OF THE TOTAL NUCLEON-DEUTERON BREAKUP CROSS SECTION AT Ed = 26.5 MeV

1976 ◽  
pp. 209-211
Author(s):  
R. van Dantzig ◽  
B.J. Wielinga ◽  
G.J.F. Blommestijn ◽  
I. Slaus
Keyword(s):  
Cross Section ◽  
Breakup Cross Section ◽  
Deuteron Breakup

Neutron-induced deuteron breakup cross section at 10.3 MeV

1989 ◽  
Vol 39 (6) ◽  
pp. 2133-2137 ◽  
Author(s):  
M. Stephan ◽  
K. Bodek ◽  
J. Krug ◽  
W. Lübcke ◽  
S. Obermanns ◽  
...  
Keyword(s):  
Cross Section ◽  
Breakup Cross Section ◽  
Deuteron Breakup

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 Current stage of studies of the star configurations at intermediate energies with the use of the BINA detector

2020 ◽  
Author(s):  
Andrzej Wilczek ◽  
Albert Szadziński ◽  
Kazimierz Bodek ◽  
Izabela Ciepał ◽  
Mohammad Eslami-Kalantari ◽  
...  
Keyword(s):  
Cross Section ◽  
Theoretical Calculations ◽  
Breakup Cross Section ◽  
Deuteron Breakup ◽  
Intermediate Energies ◽  
Systematic Uncertainties ◽  
Space Star ◽  
Large Acceptance ◽  
Current Stage ◽  
Star Configurations

The~Space Star Anomaly in proton-deuteron breakup cross-section occurs at energies of about 10~MeV. Data for higher energies are sparse. Therefore, a~systematic scan over star configurations in the~range of intermediate energies between 50 and 100 MeV/nucleon is carried out on the~basis of data collected with the~large acceptance BINA detector. The~preliminary cross section results for forward star configurations at 80 MeV/nucleon slightly surpass the~theoretical calculations, but the~systematic uncertainties are still under study. Also, a~new variable describing rotation of star configurations is proposed.

Three-body annihilations of and the quark rearrangement model

1977 ◽  
Vol 55 (23) ◽  
pp. 2059-2065 ◽  
Author(s):  
Robert K. Logan ◽  
Stephan Kogitz ◽  
Seiichi Tanaka
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Final States ◽  
Three Body ◽  
Annihilation Reactions

Aphenomenological study of the quark rearrangement model is made using the results of cross section measurements of a number of [Formula: see text] annihilation reactions. The experimental data is shown to be consistent with the quark rearrangement model and Zweig's rule, if we restricted ourselves in the three-meson final states.

scholarly journals The equation of motion phonon method and its application in the neutron rich oxygen region

2018 ◽  
Vol 194 ◽  
pp. 01003
Author(s):  
G. De Gregorio ◽  
F. Knapp ◽  
N. Lo Iudice ◽  
P. Veselý
Keyword(s):  
Experimental Data ◽  
Strong Coupling ◽  
Satisfactory Agreement ◽  
Cross Section ◽  
Level Density ◽  
Equation Of Motion ◽  
Low Energy ◽  
Nuclear Systems ◽  
Three Body ◽  
Chiral Potential

An equation of motion phonon method, developed for even-even nuclear systems and extended to odd nuclei, is applied to 22O and to its odd neighbors 23O and 23F. A calculation using the chiral potential NNLOopt is carried out in a space encompassing up to two phonons. The computed dipole cross section in 22O and the spectra of 22O and 23O are in a satisfactory agreement with the experimental data. However, the calculation describes poorly the spectrum of 23F. This discrepancy originates from the strong coupling between the odd proton and the 22O phonons of neutron nature. This coupling pushes down in energy several states enhancing the level density at low energy. We suggest that a viable route for the solution of this problem could be the inclusion of the three-body interaction using the new chiral potential NNLOsat.

K+ PRODUCTION FROM pn, pp AND pd INTERACTIONS AT ANKE/COSY

2007 ◽  
Vol 22 (02n03) ◽  
pp. 514-517
Author(s):  
◽  
YURY VALDAU
Keyword(s):  
Experimental Data ◽  
Phase Space ◽  
Total Cross Section ◽  
Cross Section ◽  
Final State ◽  
Constant Matrix ◽  
Order Of Magnitude ◽  
Simple Phase ◽  
Three Body ◽  
Exclusive Measurement

In order to understand experimental data for K+ production in proton-deuteron interactions and draw conclusions about the ratio between K+ production in pn and pp, one needs to develop an approach for the description of all relevant pp results. We perform an analysis of the pp data available in COSY energy range for three reaction channels. It can be concluded that Λ and Σ0 production channels can be well described by the three-body phase space incorporating the hyperon-nucleon final-state interactions under the assumption of a constant matrix element. Experimental data on the pp → K+ nΣ+ reaction channel are very poor and more information is needed to understand a strange behavior of the energy dependence of the total cross section. Using ANKE inclusive K+ data at 2.85 and 2.95 GeV/c, preliminary values for the total cross-section of Σ+ production in pp interactions has been extracted applying a simple phase space approach. This gives a result roughly one order of magnitude less than that of the recently published exclusive measurement.

Delta function model for the helium trimer: origin of three-body forces

2001 ◽  
Vol 99 (1) ◽  
pp. 53-56 ◽  
Author(s):  
S. M. Blinder, Lawrence L. Lohr
Keyword(s):  
Delta Function ◽  
Function Model ◽  
Helium Trimer ◽  
Body Forces ◽  
Three Body
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