Microscopic coupled-channel study of the five-nucleon system with the resonating-group method

1974 ◽  
Vol 9 (1) ◽  
pp. 56-68 ◽  
Author(s):  
F. S. Chwieroth ◽  
Y. C. Tang ◽  
D. R. Thompson
Keyword(s):  
Group Method ◽  
Nucleon System ◽  
Coupled Channel

scholarly journals PROBING THE ISOSCALAR EXCITATIONS OF 12C WITH INELASTIC ALPHA SCATTERING

2008 ◽  
Vol 17 (10) ◽  
pp. 2055-2060 ◽  
Author(s):  
DAO T. KHOA
Keyword(s):  
Inelastic Scattering ◽  
Form Factors ◽  
Wave Functions ◽  
Group Method ◽  
Exit Channel ◽  
Folding Model ◽  
Weak Binding ◽  
Channel Analysis ◽  
Alpha Scattering ◽  
Coupled Channel

The robust (spin and isospin zero) α-particle remains one of the best projectiles to probe the nuclear isoscalar excitations. In the present work, a microscopic folding model analysis of the α+12 C inelastic scattering to the 2+ (4.44 MeV), 0+ (7.65 MeV), 3- (9.64 MeV), 0+ (10.3 MeV) and 1- (10.84 MeV) states in 12 C has been performed using the 3-α resonating group method wave functions. The isoscalar transition strengths of these states were carefully studied based on the coupled-channel analysis using the microscopic folded form factors. A correlation between the weak binding and/or short lifetime of the excited state and absorption in the exit channel of inelastic scattering has been established.

HIDDEN COLOR CHANNEL EFFECTS TO THE NONSTRANGE SIX-QUARK SYSTEMS

2009 ◽  
Vol 24 (02) ◽  
pp. 151-163 ◽  
Author(s):  
H. R. PANG ◽  
J. L. PING ◽  
L. Z. CHENG
Keyword(s):  
Expansion Method ◽  
Group Method ◽  
Color Channel ◽  
Fractional Parentage ◽  
Channel Effects ◽  
The Masses ◽  
A Minor ◽  
Coupled Channel ◽  
Color Channels

A transformation table between physical bases including hidden color channels and symmetry bases for nonstrange six-quark systems is provided by using fractional parentage expansion method. By solving a coupled-channel equation, in the framework of the resonating group method (RGM), the effect of hidden color channels to all nonstrange six-quark systems is examined. It is shown that the overall effects from hidden color channels would reduce the energies of systems. For ΔΔ systems, the greatest decrease is about 20 MeV. Effects of hidden color on the masses of NN systems have been found to be about 1 MeV. However, we should emphasize that such a minor change for NN system is not negligible. We also give the most favorable hidden color channels for NN system.

COUPLED-CHANNEL STUDY FOR O-ISOTOPES WITH THE CORE PLUS VALENCE NEUTRONS MODEL

2003 ◽  
Vol 18 (02n06) ◽  
pp. 186-189
Author(s):  
HIROSHI MASUI ◽  
TAKAYUKI MYO ◽  
KIYOSHI KATŌ ◽  
KIYOMI IKEDA
Keyword(s):  
Bound States ◽  
Particle Energy ◽  
Group Method ◽  
Single Particle Energy ◽  
Folding Potential ◽  
The Core ◽  
State Dependent ◽  
Resonant States ◽  
O Isotopes ◽  
Coupled Channel

We study 17 O and 18 O nuclei by using the core +n(+n) model. We perform the coupled-channel and the resonating group method (RGM) calculations not only for bound states but also for resonant states of 17 O . We obtain the state dependent core-n folding potential and reasonable single-particle energy (SPE) in the 16 O core. By using the same interaction for 17 O , we study 18 O in the core +n+n system.

FOUR-NUCLEON BOUND STATE AND SCATTERING: EFFECT OF MANY-NUCLEON FORCES

2009 ◽  
Vol 24 (11n13) ◽  
pp. 785-790 ◽  
Author(s):  
A. DELTUVA ◽  
A. C. FONSECA ◽  
P. U. SAUER
Keyword(s):  
Bound State ◽  
Breakup Threshold ◽  
Nucleon Force ◽  
Nucleon System ◽  
Scattering Effect ◽  
Single Nucleon ◽  
Channel Potential ◽  
Three Body ◽  
Coupled Channel

The four-nucleon bound state and scattering below three-body breakup threshold are described. The description is based on a realistic coupled-channel potential which allows the excitation of a single nucleon to a Δ isobar. In the four-nucleon system the Δ isobar mediates effective two-, three- and four-nucleon forces. The effect of the four-nucleon force is found to be much smaller than the effect of the three-nucleon force.

QUARK-MODEL INTERACTIONS FOR THE COMPLETE BARYON OCTET AND THEIR APPLICATIONS TO FEW-BARYON SYSTEMS

2003 ◽  
Vol 18 (02n06) ◽  
pp. 102-111
Author(s):  
Y. FUJIWARA ◽  
M. KOHNO ◽  
Y. SUZUKI ◽  
C. NAKAMOTO ◽  
K. MIYAGAWA ◽  
...  
Keyword(s):  
Quark Model ◽  
Bound State ◽  
Nucleon Nucleon ◽  
Baryon Octet ◽  
Group Method ◽  
Model Parameters ◽  
Unified Framework ◽  
Nucleon System ◽  
Section Data ◽  
Characteristic Features

Baryon-baryon interactions of the complete baryon octet (B8) are investigated in a unified framework of the (3q)-(3q) resonating-group method, which employs the spin-flavor SU6 quark-model wave functions. Model parameters are determined to reproduce properties of the nucleon-nucleon system and the low-energy cross section data for the hyperon-nucleon interaction. The characteristic features of the B8B8 interactions predicted by the most recent model fss2 are reviewed. The nucleon-nucleon sector of this SU6 quark model is applied to calculate properties of the three-nucleon bound state. The calculated binding energy for 3H is the closest to the experiment among many results obtained by detailed Faddeev calculations employing modern realistic nucleon-nucleon potentials.

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