E2 core-polarization charge for nuclei near 16O and 40Ca

Brown, B. A.; Arima, A.; McGrory, J.B.

doi:10.1016/0375-9474(77)90263-9

Cited by 77 publications

(34 citation statements)

References 64 publications

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“…However, for completeness we give in Table 2 the USD results for the magnetic moments obtained with the free-nucleon M1 operator sd-free and with the e ective M1 operator 26 sd-e . Up to 29 Na the comparison with experiment and theory is good, but becomes signi cantly worse for 30 Na and 31 Na. This is probably a indication of the f p -shell intruder nature of these states.…”

Section: Shell-model Calculationsmentioning

confidence: 82%

“…The measurement of the very small quadrupole moments of 26 Na and 27 Na on the one side, and the calibration with a known eld gradient on the other were the major challenges. The present investigation already includes the measurement of the decay asymmetries of 30 Na and 31 Na. A measurement of the quadrupole moments 14 has to cope with much lower production yields of these isotopes and therefore needs some modi cation of the experimental procedure including a di erent c hoice of the host crystal.…”

Section: Resultsmentioning

confidence: 99%

“…For sodium the onset of deformation related to con guration mixing with f p -shell states is expected at N = 19 13, 11 . Recent measurements of the quadrupole moments of 30 Na and 31 Na, using a modi ed experimental procedure and a di erent host crystal lattice are being analyzed and will be reported separately 14 . Here we give improved values of the magnetic moments of 27,31 Na showing that the sd-shell predictions for N = 19 and 20 are relatively poor.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the electric quadrupole moments of 26–29Na

et al. 2000

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The nuclear electric quadrupole moments of the isotopes 26 Na, 27 Na, 28 Na and 29 Na were measured by -NMR spectroscopy in single crystals of LiNbO 3 and NaNO 3 . High degrees of nuclear polarization were produced by optical pumping of the sodium atoms in a fast beam with a collinear laser beam. The polarized nuclei were implanted into the crystals and NMR signals were observed in the -decay asymmetries. Preparatory measurements also yielded improved values for the magnetic moments of 27,31 Na and con rmed the spin I = 3=2 for 31 Na. The results are discussed in comparison with large-basis shell-model calculations.

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Section: Shell-model Calculationsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Measurement of the electric quadrupole moments of 26–29Na

et al. 2000

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“…One of the earliest analyses of E2 transitions in the lower part of the pf shell gave e p = 1.16 (16) and e n = 0.45(3) [46]. It is expected that δe n > δe p due to the repulsive contribution of the giant isovector quadrupole resonance [45]. Microscopically derived ∆N = 2 effective charges are nucleus and orbital dependent [51].…”

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confidence: 99%

High-precisionB(E2)measurements of semi-magicNi58,60,62,64
Allmond
¹
,
Brown
²
,
Stuchbery
³

et al. 2014
Phys. Rev. C
31
5
22
1
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“…Effective charges [33], within a given model space, carry information on the degree of core polarization induced by the valence neutrons, and their magnitude (suppression) can then be a measure of the neutron-core (de)coupling. Effective charges are generally not expected to be constant as a function of increasing asymmetry (N − Z), but to have an approximate 1/A dependence [34].…”

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confidence: 99%