Article

The deuteron

May 1978

Authors:

''It is of particular interest to study the simplest nuclear system, that is the diplon [deuteron], which almost certainly consists of a neutron and a proton.''1

A phenomenological nucleon-nucleon interaction

Article

Jan 1999
J Phys G Nucl Phys

L Petris

A phenomenological NN interaction which fits the deuteron properties and the elastic scattering data is presented. The only parameters are the pi , rho and omega masses and one overall strength.

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Article

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Radii and Binding Energies of Nuclei from a Model of the pn-pair Interactions

September 2005

G. K. Nie

New formulas to calculate the nuclear charge radii and the nuclear binding energies have been derived in the framework of an alpha-cluster model. The particular features of the model are two assumptions that the proton-neutron pair interactions are responsible for adherence between alpha-clusters and that the proton and the neutron from a proton-neutron pair have equal nuclear potentials. These ... [Show full abstract] assumptions allow one to determine the charge and Coulomb radii in dependence on the amount of proton-neutron pairs in the nucleus. Unlike the Weizsacker's formula to calculate nuclear binding energies, in the model the binding energies of alpha-clusters and excess neutrons are estimated separately. The calculated values are in a good agreement with the experimental data.

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Article

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Neutron and proton asymptotic coefficients for symmetric and mirror nuclei

December 2007 · Bulletin of the Russian Academy of Sciences Physics

The parameters of the bound-state potential and the corresponding asymptotic coefficients of the wave functions for a number of symmetric and mirror nuclei of the 1d shell have been obtained within the single-particle approximation by solving the Schrödinger equation under the condition of equivalence of the nuclear potentials of the proton and neutron of one pair (EPN condition). The criterion ... [Show full abstract] for selecting the parameters was the equality of the calculated and experimental values of the nuclear radius. It is shown that, as a result of application of the EPN condition and the well-depth procedure, the ratio of the squares of the asymptotic coefficients for the neutron and proton of one pair becomes a constant, insensitive to variation in the parameters.

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Article

NUCLEAR PHYSICS DATA FROM THE USSR

January 1958

Kunz

Tabulated data are given on the fission cross sectlons of U Â²Â³Â³, U/; sup 235/, PuÂ²Â³â¹, and PuÂ²â´Â°, on the determination of t he ratio of ; neutrons released by fission neutrons to neutrons released by thermal neutrons, ; on the cross sections of Th and In to thermal neutrons, amd the fission of U, Th, ; and Bi by protons at 680 Mev. (J.S.R.);

Article

ENERGY REMOVED FROM PRIMARY PROTON AND NEUTRON BEAMS BY TISSUE

September 1962

W.A. Gibson

The energy removed from primary nucleon beams with energies between 10 and 1000 Mev as they pass through biological tissue is calculated. It is shown that for neutrons with energies above 15 Mev and for protons above 300 Mev the major energy removal mechanism is nuclear absorption of the primary nucleon and that the importance of this process increases with increasing nucleon energy. A ... [Show full abstract] qualitative discussion is also given of the biological importance of the secondary nucleons and of the nuclear recoils resulting from the absorption process. (auth)

Article

New Scheme for Calculating Nuclear Radii

January 1963

Jenn-Lin Hwang

It is pointed out that the nuclear radius is a function not of the mass ; number alone, but rather of neutron number and proton number. A convenient ; interpolation scheme for calculating nuclear radii is proposed. (auth);

Article

Double binding energy differences: Mean-field or pairing effect?

October 2012 · Physics Letters B

Chong Qi

In this paper we present a systematic analysis on the average interaction between the last protons and neutrons in atomic nuclei, which can be extracted from the double differences of nuclear binding energies. The empirical average proton-neutron interaction

V_{pn}

thus derived from experimental data can be described in a very simple form as the interplay of the nuclear mean field and the ... [Show full abstract] pairing interaction. It is found that the smooth behavior as well as the local fluctuations of the

V_{pn}

in even-even nuclei with

N\neq Z

are dominated by the contribution from the proton-neutron monopole interactions. A strong additional contribution from the isoscalar monopole interaction and isovector proton-neutron pairing interaction is seen in the

V_{pn}

for even-even N=Z nuclei and for the adjacent odd-A nuclei with one neutron or proton being subtracted.

Article

Erratum: Bounds on ΔB = 1 couplings in the supersymmetric standard model

January 1996 · Physics Letters B

The most general supersymmetric model contains baryon number violating terms of the form \lm_{ijk}\ \ov{D}_i\ \ov{D}_j\ \ov{U}_k in the superpotential. We reconsider the bounds on these couplings, assuming that lepton number conservation ensures proton stability. These operators can mediate n-\ov{n} oscillations and double nucleon decay. We show that neutron oscillations do not, as previously ... [Show full abstract] claimed, constrain the \lm_{dsu} coupling; they do provide a bound on the \lm_{dbu} coupling, which we calculate. We find that the best bound on \lm_{dsu} arises from double nucleon decay into two kaons. There are no published limits on this process; experimenters are urged to examine this nuclear decay mode. Finally, the other couplings can be bounded by the requirement of perturbative unification.

Article

Nuclear Resonance Flourescence Studies of Levels in 206Pb, 207Pb, 208Pb and 209Bi below about 5MeV

October 1974 · Journal of the Franklin Institute

C. P. Swann

Capabilities of the resonance flourescence technique are discussed. Specific reference is given to the study of ground state dipole and electric quadrople transitions below about 5 MeV in 206Pb, 207Pb, 208Pb and 209Bi. It is suggested that many of the states observed in 207Pb and 209Bi arise from the weak-coupling of a p neutron hole or an h proton to collective levels of 208Pb.

Article

Properties of Low-Density Neutron-Star Matter

July 1971 · Physical Review Letters

A nuclear Thomas-Fermi model is used to determine the ground state of matter at subnuclear densities allowing for inhomogeneities on a nuclear scale ("clusters"). The "neutron drip" phase transition occurs at 3.7 \ifmmode\times\else\texttimes\fi{}

{10}^{11}

{\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}

. As a function of the average density the proton number Z of the clusters first increases from ... [Show full abstract] Z\simeq

{}29

at 1.4 \ifmmode\times\else\texttimes\fi{}

{10}^{8}

{\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}

to a maximum of Z\simeq

{}35

at

\sim

{}3.0 \ifmmode\times\else\texttimes\fi{}

{10}^{12}

{\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}

and then decreases until the clusters gradually evanesce just above

{10}^{14}

{\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}

; this transition is smooth.

Chapter

The Nuclear Two-Body Problem

January 2014

Anwar Kamal

Deuteron consists of a proton and a neutron. It is essentially a loose structure as implied by its low binding energy at around 2 MeV, i.e. 1 MeV per particle, in contrast with a value of 8 MeV for the average binding energy per nucleon in medium and heavy nuclei. The binding energy of deuteron has been determined by various methods.

Article

Full-text available

Effect of different baryon impurities

November 2004 · Physical Review C

We demonstrate the different effects of different baryon impurities on the static properties of nuclei within the framework of the relativistic mean-field model. Systematic calculations show that Λc+ and Λb have the same attracting role as the Λ hyperon does in lighter hypernuclei. Ξ− and Ξc0 hyperons have the attracting role only for the proton distribution and have a repulsive role for the ... [Show full abstract] neutron distribution. On the contrary, Ξ0 and Ξc+ hyperons attract surrounding neutrons and reveal a repulsive force to the protons. We find that the different effects of different baryon impurities on the nuclear core are due to the different third components of their isospin.

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Preprint

Effects of the initialization of nucleon momentum in heavy-ion collisions at medium energies

July 2018

Based on the Isospin-dependent transport model Boltzmann-Uehling-Uhlenbeck (IBUU), effects of the difference of the high momentum tails (HMTs) of nucleon momentum distribution in colliding nuclei on some isospin-sensitive observables are studied in the

^{197}\rm {Au}+^{197}\rm {Au}

reactions at incident beam energy of 400 MeV/nucleon. It is found that the nucleon transverse and elliptic flows, ... [Show full abstract] the free neutron to proton ratio at low momenta are all less sensitive to the specific form of the HMT, while the free neutron to proton ratio at high momenta and the yields of

\pi^{-}

and

\pi^{+}

as well as the

\pi^{-}/\pi^{+}

ratio around the Coulomb peak are sensitive to the specific form of the HMT. Combining the present studies with the experimental measurements at rare-isotope reaction facilities worldwide, one may get more insights into the nuclear short-range correlations in heavy nuclei or nuclear matter.

The deuteron

Abstract

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