Total neutron cross sections of isotopes and the isobaric spin term of the nuclear potential

Dukarevich, Yu.V.; Dyumin, A.N.; Kaminker, D.M.

doi:10.1016/0375-9474(67)90228-x

Cited by 27 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our new data are in good agreement with the previous measurements where available. In the cases of the rare isotopes 64 Ni and 112 Sn, data were available at only one energy, 14.1 MeV, from a study from more than 50 years ago [34] and our measurement is in excellent agreement, within 2-3%.…”

Section: Resultssupporting

confidence: 56%

See 1 more Smart Citation

Isotopically resolved neutron total cross sections at intermediate energies

Pruitt,

Charity,

Sobotka

et al. 2020

Preprint

View full text Add to dashboard Cite

The neutron total cross sections σtot of 16,18 O, 58,64 Ni, 103 Rh, and 112,124 Sn have been measured at the Los Alamos Neutron Science Center (LANSCE) from low to intermediate energies (3 ≤ E lab ≤ 450 MeV) by leveraging waveform-digitizer technology. The σtot relative differences between isotopes are presented, revealing additional information about the isovector components needed for an accurate optical-model (OM) description away from stability. Digitizer-enabled σtot-measurement techniques are discussed and a series of uncertainty-quantified dispersive optical model (DOM) analyses using these new data is presented, validating the use of the DOM for modeling light systems ( 16,18 O) and systems with open neutron shells ( 58,64 Ni and 112,124 Sn). The valence-nucleon spectroscopic factors extracted for each isotope reaffirm the usefulness of high-energy proton reaction cross sections for characterizing depletion from the mean-field expectation.

show abstract

Section: Resultssupporting

confidence: 56%

“…FIG.9: Neutron σtot for16,18 O,58,64 Ni, and 112,124 Sn: our results and literature data. In the upper three panels, our digitizermeasured isotopic results are shown in red and corresponding analog-measured literature data[8,34,[36][37][38][39][40][41][42] are shown in blue. The data for18 O have been shifted up by 1 barn for visibility.…”

mentioning

confidence: 99%

Isotopically resolved neutron total cross sections at intermediate energies

Pruitt,

Charity,

Sobotka

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…In Fig. 2, for example, it is seen that the '"Nd fit is not as good as the Sm fit from 1 to 5 MeV. This discrepancy probably contributes to the poor quality of the fits over the same energy range for the Nd relative differences shown in Fig.…”

Section: Andmentioning

confidence: 89%

“…The data presented in Figs. 5 and 8 show that, in this mass region, neutron total cross sections change in a systematic way when either two neutrons or two protons are added to a nucleus. This behavior probably is a consequence of regular changes in size and/or deformation with neutron or proton number and strongly suggests the possibility of determining unknown neutron total cross sections with reasonable precision simply by the method of extrapolation from known ones (provided, of course, that the difference in A is small).…”

Section: Andmentioning

confidence: 94%

Effects of deformation on neutron total cross sections of even-ANd and Sm isotopes

et al. 1980

View full text Add to dashboard Cite

Sm have been measured at 25 energies from 0.75 to 14 MeV. Each sample consisted of about 40 g of powdered oxide with an isotopic enrichment & 94/o.For each isotopic pair the total cross-section difference was determined directly by measuring the ratio of transmitted flux for matched samples. This difference was'found to have an oscillatory behavior when plotted as a function of incident neutron energy. The oscillations have been explained as a deformation effect qualitatively in terms of the nuclear Ramsauer effect and quantitatively using a deformed optical model potential. Adding two neutrons to a nucleus in this mass region was found to have a different effect on the neutron total cross section than adding two protons. A coupled channel analysis was performed using as input data the present total cross sections, low-energy neutron scattering parameters, and elastic and inelastic (2+) differential cross sections for neutron scattering at 4 and 7 McV. Excellent total cross-section fits were obtained for the Sm isotopes; however, the total cross-section fits for the Nd isotopes were only fair. Quadrupole deformation parameters have been deduced for all the isotopes studied. The sensitivity of neutron total cross-section differences to this parameter and to the real isospin term of the nuclear potential is discussed. gUCLEAH REACTIONS i42'~44'i @ 48'~~ONd, E"=0.75-13.89 MeV, i~0'~52'i Sm, E"=0.75-14.49 MeV; measured o'" tpt{E). Enriched targets. Deduced coupledchannel optical-potential parameters, quadrupole deformation parameters.

show abstract

The Optical Model

Satchler

Perey

1990

Nuclear Structure Study With Neutrons

View full text Add to dashboard Cite

Total neutron cross sections of isotopes and the isobaric spin term of the nuclear potential

Cited by 27 publications

References 23 publications

Isotopically resolved neutron total cross sections at intermediate energies

Isotopically resolved neutron total cross sections at intermediate energies

Effects of deformation on neutron total cross sections of even-ANd and Sm isotopes

The Optical Model

Contact Info

Product

Resources

About