scholarly journals Nucleon-nucleon momentum-correlation function as a probe of the density distribution of valence neutrons in neutron-rich nuclei

2012 ◽  
Vol 86 (4) ◽  
Author(s):  
X. G. Cao ◽  
X. Z. Cai ◽  
Y. G. Ma ◽  
D. Q. Fang ◽  
G. Q. Zhang ◽  
...  
Keyword(s):  
Correlation Function ◽  
Density Distribution ◽  
Nucleon Nucleon ◽  
Nucleon Momentum ◽  
Momentum Correlation

scholarly journals Nucleon-nucleon momentum correlation function for light nuclei

2007 ◽  
Vol 790 (1-4) ◽  
pp. 299c-302c ◽  
Author(s):  
Y.G. Ma ◽  
X.Z. Cai ◽  
J.G. Chen ◽  
D.Q. Fang ◽  
W. Guo ◽  
...  
Keyword(s):  
Correlation Function ◽  
Nucleon Nucleon ◽  
Light Nuclei ◽  
Nucleon Momentum ◽  
Momentum Correlation

ACCURACY OF THE MULTIPOLE EXPANSION OF DENSITY DISTRIBUTION IN THE PRESENCE OF OCTUPOLE DEFORMATION

2011 ◽  
Vol 20 (12) ◽  
pp. 2407-2415
Author(s):  
M. ISMAIL ◽  
M. M. BOTROS ◽  
A. A. WHEIDA
Keyword(s):  
Density Distribution ◽  
Coulomb Barrier ◽  
Orientation Angle ◽  
Multipole Expansion ◽  
Heavy Ion ◽  
Nucleon Nucleon ◽  
Large Error ◽  
Octupole Deformation ◽  
Zero Range ◽  
Density Expansion

The accuracy of multipole expansion of density distribution for deformed nuclei is tested. The interaction potential for a deformed-spherical pair of nuclei was calculated using the folding model derived from zero-range nucleon–nucleon (NN) interaction. We considered two spherical projectiles Ca 40 and Pb 208 scattered on U 238 deformed target nucleus. The error in the heavy ion (HI) potential resulting from using a truncated multipole density expansion is evaluated for each case in the presence of octupole deformation δ3 besides quadrupole δ2. We are interested in the value of error for R ≥ RT (touching distance). We found that for values of |δ3|≤0.1 the error at R = RT reaches reasonable values when six terms expansion is used. For |δ3| = 0.2, we calculated the Coulomb barrier parameters using realistic NN force and found that the large error present in six terms for zero range force decreases strongly to less than 1% when the zero range is added to finite range forces and Coulomb interaction to form the Coulomb barrier. It is noted that the negative value of octupole deformation parameters δ3 = -0.1 produce error at orientation angle θ equal in value to that produced at angle (180°-θ) for the positive values δ3 = 0.1. We also found that the error decreases as the mass number of the projectile nucleus increases.

scholarly journals Universality of nucleon-nucleon short-range correlations: Two-nucleon momentum distributions in few-body systems

2012 ◽  
Vol 85 (2) ◽  
Author(s):  
M. Alvioli ◽  
C. Ciofi degli Atti ◽  
L. P. Kaptari ◽  
C. B. Mezzetti ◽  
H. Morita ◽  
...  
Keyword(s):  
Short Range ◽  
Nucleon Nucleon ◽  
Nucleon Momentum ◽  
Momentum Distributions ◽  
Short Range Correlations

MEASUREMENT OF THE PROTON-PROTON CORRELATION FUNCTION FROM THE BREAK-UP OF 22Mg AND 20Ne

2010 ◽  
Vol 19 (08n09) ◽  
pp. 1823-1828 ◽  
Author(s):  
X. Y. SUN ◽  
J. G. CHEN ◽  
D. Q. FANG ◽  
Y. G. MA ◽  
X. Z. CAI ◽  
...  
Keyword(s):  
Correlation Function ◽  
Excited States ◽  
Correlation Functions ◽  
Center Of Mass ◽  
Cluster Decay ◽  
Proton Proton ◽  
Fragment Separator ◽  
Angular Correlations ◽  
Momentum Correlation ◽  
Projectile Fragment

An experiment of 22 Mg and 20 Ne beams bombarding on a 12 C target at an energy of 60~70 A MeV has been performed at the RIKEN projectile fragment separator (RIPS) in the RIKEN Ring Cyclotron Facility to study the two-proton correlated emission from 22 Mg and 20 Ne excited states. The two-protons momentum correlation functions have been obtained for 22 Mg and 20 Ne , respectively. The trajectories of the 22 Mg decayed products (20 Ne + p + p ) were also measured to get the angular correlations between the two protons in Center of Mass of decaying system by relativistic-kinematics reconstruction. The results exhibit that 22 Mg has the features of 2 He cluster decay mechanism.

A calculation of the production of pions by 450-MeV protons on nuclei

1968 ◽  
Vol 46 (9) ◽  
pp. 1141-1144 ◽  
Author(s):  
D. McMillin ◽  
P. Bhargava ◽  
L. Lam ◽  
E. W. Vogt
Keyword(s):  
Density Distribution ◽  
Momentum Distribution ◽  
Nucleon Nucleon ◽  
Density Dependent ◽  
Pion Absorption ◽  
Pion Energy ◽  
Nuclear Effects ◽  
Mev Protons

Starting with assumed pion yields in nucleon–nucleon collisions, we consider the influence of the various nuclear effects on the pion yields from the bombardment of various nuclei with 450-MeV protons. In addition to the proton and pion absorption within the nucleus considered by earlier workers, we also include the effects of the momentum distribution and the density distribution of the struck nucleons. The pion absorption, which is density-dependent, is found to dominate the relative yields in various nuclei at these proton energies, using modern densities. We obtain agreement with the measured relative yields as illustrated with the results for pion angle of 21.5° and pion energy of 83 MeV.

The nucleon momentum and density distribution of the4He nucleus using the Morse potential

1997 ◽  
Vol 23 (11) ◽  
pp. 1609-1617 ◽  
Author(s):  
K Ypsilantis ◽  
S Dimitrova ◽  
C Koutroulos ◽  
M Grypeos ◽  
A N Antonov
Keyword(s):  
Density Distribution ◽  
Morse Potential ◽  
Nucleon Momentum
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