Showing papers on "Mass formula published in 1974"
TL;DR: In this article, the validity of the Wigner supermultiplet scheme in the d-s shell was investigated for nuclei with neutron excess using the spectral distribution methods of French.
19 citations
TL;DR: In this paper, the results of the nonrelativistic quark model can be reproduced by a fully relativistic model of deeply bound spin - 1 2 quarks.
12 citations
TL;DR: A semi-empirical mass formula of a particular parton model, in which it is assumed that partons are highly charged, requires the existence of a new class of hadrons, at least one of which must be absolutely stable and whose masses are of the order of a few GeV as discussed by the authors.
10 citations
TL;DR: The first excited state of $^{9}\mathrm{C}$ and its analog in $''9}$ have been observed, and their mass excesses and widths have been measured as discussed by the authors.
Abstract: The first excited state of $^{9}\mathrm{C}$ and its analog in $^{9}\mathrm{B}$ have been observed, and their mass excesses and widths have been measured. This completes a new mass quartet which differs from the predictions of the isobaric multiple mass equation less significantly than the ground state $A=9$ quartet.
9 citations
TL;DR: In this paper, the authors re-analyzed the (70, 1−)-representation of SU6×O3 using the symmetric quark model of Greenberg and Resnikoff and the most recent experimental information.
Abstract: We have re-analyzed the (70, 1−)-representation ofSU6×O3 using the symmetric quark model of Greenberg and Resnikoff and the most recent experimental information. The eleven parameters of the model mass formula are determined by χ2, and predictions are obtained for the masses and mixings of all (70, 1−)-states. With these predictions and the assumption that decays are invariant underSU6w×O2Lz, partial widths for all decays of (70, 1−)-states into baryons in (56, 0+) and pseudoscalar mesons in (35, 0−) are computed and compared to experimental values. The predictions forS-wave decays are in serious disagreement with experiment but the predictions forD-wave decays, with one exception, are a reasonable first approximation in an average sense to the observed values. We could not, however, obtain a good fit to the masses andD-wave decay rates simultaneously. Therefore, either the mass formula does not correctly give the mixing of the states orSU6W×O2Lz is violated in the decays.
8 citations
6 citations
TL;DR: In this paper, a quadratic mass formula proposed by Talmi for identical nucleons in an open and non degenerate shell is discussed and corrections coming from the breaking of generalized seniority are examined.
5 citations
TL;DR: A general mass formula based on the principle of quantisation of rest mass was proposed in this paper, which gives accurate mass ratios for many known elementary particles, predicting the muon mass to within 1 part in 10,000 of the experimental value and indicates the possibility for the existence of a number of particles which have not yet been identified experimentally.
Abstract: A general mass formula, based on the principle of quantisation of rest mass, gives accurate mass ratios for many of the known elementary particles, predicting the muon mass to within 1 part in 10,000 of the experimental value and indicates the possibility for the existence of a number of particles which have not yet been identified experimentally.
3 citations
TL;DR: A literal interpretation of the Garvey-Kelson mass formula was used to relate deviations from the simple predictions for certain sextuplets of nuclei as mentioned in this paper, and large discrepancies between prediction and experiment for 25 Ne, 29 Mg and 33 Si were, in this way, removed.
2 citations
TL;DR: In this article, the self-cranked generator coordinate (SCGC) formalism described earlier for computing the mass parameter for collective nuclear motion is cast into a form containing no explicit reference to the Hamiltonian.
Abstract: The self-cranked generator coordinate (SCGC) formalism described earlier for computing the mass parameter for collective nuclear motion is cast into a form containing no explicit reference to the Hamiltonian. The expression is then specialized to the nuclear model of deformed harmonic oscillators. The usual Gaussian overlap approximation is eschewed in favor of direct evaluation of the appropriate matrix elements. Exchange terms are handled by a diagrammatic technique. The validity of certain assumptions made in the derivation of the mass formula is tested numerically. The effects of pairing and of short-range Jastrow correlations are investigated. The SCGC mass parameter is computed for several $N=Z$ nuclei and found to be smaller than either the cranking or the irrotational values, if no correlations are included. The inclusion of short-range correlations is shown to lead to important changes in the value of the mass parameter.
2 citations
Journal Article•
TL;DR: In this article, the nonstrange baryonic masses using the mass formula proposed earlier and compare them with all available experimental numbers were calculated and the agreement was excellent for then = 0 and n=1 radial modes, and quite good for then=2 multiplets.
Abstract: We calculate the nonstrange baryonic masses using the mass formula proposed earlier and compare them with all available experimental numbers. The agreement is excellent for then=0 andn=1 radial modes, and is quite good for then=2 multiplets. The observed masses which may belong to then=3 andn=4 states seem to favor a mass formula in which the mass squared is linear in the radial quantum number.