First0+Excited State ofO16in theα-Particle Model of Light Nuclei

1972 ◽  
Vol 6 (3) ◽  
pp. 677-679 ◽  
Author(s):  
Y. Avishai
Keyword(s):  
Excited State ◽  
Light Nuclei ◽  
Particle Model

Inelastic Scattering from Light Nuclei—the Alpha-Particle Model forBe9

1958 ◽  
Vol 112 (6) ◽  
pp. 2029-2042 ◽  
Author(s):  
J. S. Blair ◽  
E. M. Henley
Keyword(s):  
Inelastic Scattering ◽  
Alpha Particle ◽  
Light Nuclei ◽  
Particle Model

scholarly journals Application of single particle model to determine the spin and parity of levels of 59Fe nucleus

2015 ◽  
Vol 18 (1) ◽  
pp. 92-101
Author(s):  
Son An Nguyen ◽  
Lanh Dang
Keyword(s):  
Experimental Data ◽  
Excited State ◽  
Shell Model ◽  
Single Particle ◽  
Ground State ◽  
Particle Model ◽  
Nuclear Shell Model ◽  
Average Mass ◽  
Single Particle Model ◽  
Nuclear Shell

The spin and parity of the excited state and the ground state of nuclei are two of important properties of the nuclei quantum. However, up to now we do not have appropriate equipments to directly detetmine the spin and parity of nuclei. This paper shows the application of nuclear shell model to study the spin and parity of intermediate levels and ground state of 59Fe nucleus. Comparing to previously experimental data, this nucleus singleparticle model is suitable of the average mass and odd A nuclei.

scholarly journals Clustering in $^{18}$O - absolute determination of branching ratios via high-resolution particle spectroscopy

2020 ◽  
Author(s):  
Stuart Pirrie ◽  
Carl Wheldon ◽  
Tzany Kokalova ◽  
Jack Bishop ◽  
R. Hertenberger ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Excited State ◽  
High Resolution ◽  
Cluster Structure ◽  
High Energy ◽  
Branching Ratios ◽  
Light Nuclei ◽  
Decay Channels ◽  
Monte Carlo Techniques

The determination of absolute branching ratios for high-energy states in light nuclei is an important and useful tool for probing the underlying nuclear structure of individual resonances: for example, in establishing the tendency of an excited state towards \alphaα-cluster structure. Difficulty arises in measuring these branching ratios due to similarities in available decay channels, such as (\mathbf{^{18}}18O,\mathbf{n}𝐧) and (\mathbf{^{18}}18O,\mathbf{2n}2𝐧), as well as differences in geometric efficiencies due to population of bound excited levels in daughter nuclei. Methods are presented using Monte Carlo techniques to overcome these issues.

scholarly journals The scattering of α -particles in helium

1939 ◽  
Vol 172 (951) ◽  
pp. 559-567 ◽  
Keyword(s):  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Potential Barrier Height ◽  
Light Nuclei ◽  
Coulomb Scattering ◽  
Particle Scattering ◽  
Broad Level ◽  
Resonances In Scattering ◽  
Α Particles

In a previous paper (Devons 1939) the author has discussed the possibility of observing resonance phenomena in the scattering of α -particles by light nuclei, and the experimental results given there show that in general resonances in scattering are observable for light nuclei of atomic number less than about 12 and for α -particle energies about equal to or greater than the potential barrier height. In the case of the scattering by helium nuclei the classical coulomb scattering is very small, and therefore anomalies in the scattering due to excited states of Be 8 , the compound nucleus formed by He 4 and an α -particle, should be comparatively easy to detect. In addition no disintegration is possible with α -particles of the energies used (less than 8.5 MeV), so that if the nucleus Be 8 is formed in an excited state it can only dissociate into two α -particles, and hence the width of any level of Be 8 excited by α -particle scattering in helium will be due practically entirely to elastic scattering. The investigation of the excited states of Be 8 by means of the scattering of α -particles by helium nuclei has a particular interest since the existence of a broad level of Be 8 with an excitation energy of about 3 MeV above the ground state, which is capable of splitting up into two α -particles, is postulated to account for the results of several disintegration experiments.

scholarly journals QUANTUM-INFORMATION CONTENT OF FRACTIONAL OCCUPATION PROBABILITIES IN NUCLEI

2005 ◽  
Vol 14 (04) ◽  
pp. 653-661 ◽  
Author(s):  
K. CH. CHATZISAVVAS ◽  
C. P. PANOS
Keyword(s):  
Quantum Information ◽  
Probability Distribution ◽  
Information Content ◽  
Information Entropy ◽  
Short Range ◽  
Light Nuclei ◽  
Particle Model ◽  
Independent Particle ◽  
Independent Particle Model ◽  
Short Range Correlations

Three measures of the information content of a probability distribution are briefly reviewed. They are applied to fractional occupation probabilities in light nuclei, taking into account short-range correlations. The effect of short-range correlations is to increase the information entropy (or disorder) of nuclei, comparing with the independent particle model. It is also indicated that the information entropy can serve as a sensitive index of order and short-range correlations in nuclei. It is concluded that increasing Z, the information entropy increases, i.e. the disorder of the nucleus increases for all measures of information considered in the present work.

Neutrons from Deuteron Bombardment of Boron

1957 ◽  
Vol 10 (2) ◽  
pp. 268 ◽  
Author(s):  
JR Bird ◽  
RH Spear
Keyword(s):  
Excited State ◽  
Compound Nucleus ◽  
Ground State ◽  
Angular Distributions ◽  
Particle Model ◽  
Upper Limit ◽  
First Excited State ◽  
Compound Nucleus Formation ◽  
Deuteron Bombardment ◽  
Peak Widths

A natural boron target has been bombarded by 920 keV deuterons, and the emitted neutrons detected using nuclear emulsions. A new procedure for analysing measurements is described ; this procedure allows approximate corrections for errors in geometry in the plane of the emulsions. The dependence of resolution on various experimental factors has been studied, and the resolution achieved is indiCated by peak widths of 245 � 25keV and 360 � 50 keV at neutron energies of 9�7 MeV and 13�9 MeV respectively. The angular distributions of the neutrons from the 10B(d,n)l1C reaction corresponding to the ground state of 11C, and the neutrons from the 11B(d,n)12C reaction corresponding to the 7�66 Me V state in 12C, have been determined; both distributions may be attributed to compound nucleus formation. A search has been made for a neutron group corresponding to an excited state at about 5�5 MeV in 12C suggested by Glassgold and Galonsky (1956) on the basis of the a-particle model. An upper limit for the intensity of any such group is set at 1 per cent. of the intensity of the group corresponding to the first excited state in 12C.

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