The elastic scattering of 16O from even Ca isotopes near the Coulomb barrier

Bertin, M.C.; Tabor, S. L.; Watson, B.A.; Eisen, Y.; Goldring, G.

doi:10.1016/0375-9474(71)90595-1

Cited by 44 publications

(3 citation statements)

References 6 publications

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“…More generally used at present than the direct phase shift parametrization is the optical model (58)(59)(60)(64)(65)(66)(67)(68). Here a nuclear potential is postulated; its fu nctional fo rm and parameters are then adjusted to give a fit to elastic scattering data.…”

Section: Optical Modelmentioning

confidence: 99%

Reactions Between Medium and Heavy Nuclei and Heavy Ions of Less Than 15 Mev/Amu

Fleury¹,

Alexander²

1974

Annu. Rev. Nucl. Sci.

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Section: Optical Modelmentioning

confidence: 99%

Reactions Between Medium and Heavy Nuclei and Heavy Ions of Less Than 15 Mev/Amu

Fleury¹,

Alexander²

1974

Annu. Rev. Nucl. Sci.

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“…Enfin, notons ici encore que des mesures récentes ont montré que la diffusion élastique d'ions lourds tels que l'oxygène à des énergies proches de la barrière coulombienne possède des propriétés très semblables à celles de la diffusion de particules a dans des conditions semblables [35], [36], [37], et qu'en particulier il existe bien une relation d'invariance du type (12). L'analyse par Robertson et al [36] [36]).…”

Section: La Diffusion De Particules a Aux éNergies Intermédiaires Et ...unclassified

Distribution De Matière Nucléaire Et Diffusion Élastique d'IONS Légers Et Lourds

Fernández¹

1973

J. Phys. Colloques

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La diffusion élastique de protons, deutons, particules a et ions lourds, utilisée comme moyen de déterminer la distribution de matière des noyaux, est passée en revue et discutée. Les résultats récents indiquent que, malgré certaines difficultés encore à surmonter, ces méthodes permettent des déterminations de rayons de distributions de matière a -t 0,l frn près.Abstract.-Elastic scattering of protons, deuterons, cl-particles and heavy ions is reviewed and discussed as a mean to determine nuclear matter distributions. Recent results indicate that, in spite of some as yet unsolved problems, these methods allow the determination of nuclear matter radii within + 0.1 fm.

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“…Consequently, charge distribution measurements have been made by experiments on muonic isotope shifts [1], optical isotope shifts [2M], and by electron scattering [5]. Mass distributions have been investigated by strongly interacting probe particles like positive and negative pions [6,7], protons [8], ~ particles [9] and heavier ions like 160 [10]. Grossly speaking the results of these experiments can be summarized as follows: (a) The difference between the mass and charge distribution of Ca nuclei increases between A =40 and A =48 (b) the charge distribution of 4~ and 48Ca is equal, whereas all the even nuclei between them have a charge radius larger in size by about 1%.…”

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confidence: 99%

Nuclear charge distribution of41Ca

et al. 1979

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The mean square nuclear charge radius of 41Ca equals the one of double magic 4~ within 0.006 fin.The nuclear charge and mass distribution of Ca nuclei 40 between the two double magic isotopes 20Ca20 and 48 2oCa2s has been the testing ground for practically all of the experimental methods to determine these quantities. Double magic 4~ has equal numbers of protons and neutrons and is considered extremely spherical.Addition of one neutron in the .1"7/2 shell yields information about the penetration or polarization of the 4~ core by a single nucleon. Incorporation of further neutrons or neutron pairs into the ./7/2 shell up to the closed configuration of double magic 4SCa opens the way for a study of changes in the radius of the Ca proton core if the neutron number is changed by as much as 40 %. In the sense outlined above, the long chain of stable nuclei of Ca can be regarded as a unique target for the study of the distribution of nuclear matter, in particular for light nuclei. The facts of (a) and (b) imply that, as the J7/2 shell is filled, these excess neutrons form a skin outside the 4~ core. The anomalous behaviour of (c) can be interpreted as a partial break up of the first fT/z neutron pair by the additional neutron which form altogether a layer of neutrons around the 4~ nucleus. In order to shed some more light on the peculiar trend of the Ca nuclear charge distributions it is indispensable to study the influence of a single neutron on the 4~ core. This paper reports such study, the determination of the nuclear charge radius of radio-41 active z0Cazl which was unknown so far. The charge distribution of 41Ca was measured via its optical isotope shift in a tuned dye laser spectroscopy experiment whose details have been described previously [2, ll, 12]. Advantages of the experimental technique applied here compared to other methods are that extremely small quantities of the isotope under investigation can be studied even in the presence of large quantities of other isotopes, and that additional information on the nuclear charge distribution can be obtained from the quadrupole moment Q, because the atomic hyperfine structure can be measured. The radioactive isotope 41Ca, which decays by electron capture to 41K with a half life of ~ = 1.3 -l0 s y, has been produced by neutron capture of 4~ Since the cross section for this process (a=0.40b) is rather small, a 41Ca-concentration of only one part in thousand could be obtained after a year of irradiation, even though a high flux of 3 9 1014 thermal neutrons cm-2 s-1 at the reactor facility in Mol/Belgium was used. The experimental technique applied here was sensitive to small amounts of 4~Ca (>10 4) in the presence of nearly 100 % 4~ and possible tiny impurities of other

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The elastic scattering of 16O from even Ca isotopes near the Coulomb barrier

Cited by 44 publications

References 6 publications

Reactions Between Medium and Heavy Nuclei and Heavy Ions of Less Than 15 Mev/Amu

Reactions Between Medium and Heavy Nuclei and Heavy Ions of Less Than 15 Mev/Amu

Distribution De Matière Nucléaire Et Diffusion Élastique d'IONS Légers Et Lourds

Nuclear charge distribution of41Ca

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