A determination of quadrupole moments In 114Cd, 130Ba, 148Sm and 150Sm

Simpson, John; Eccleshall, D.; Yates, M.J.L.; Freeman, N. J.

doi:10.1016/0375-9474(67)90817-2

Cited by 86 publications

(3 citation statements)

References 17 publications

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“…However, such a calculation would have great difficulty in reproducing a 7/2 + state at 8.4keV and a (1/2-, 3/2 ) at 318.4keV. It is known that the neighbouring even-even, 12SBa and 13~ are deformed [15,30,31,32]. Using a Nilsson model for prolate deformation of fl_~0.…”

Section: Spin-parity Assignment and Discussionmentioning

confidence: 98%

Structure of129Ba from the decay of129La

1979

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The structure of lZ9Ba is investigated through the beta decay of lZ9La, whose half-life is measured to be 11.6+0.2m. The decay properties are studied by means of beta, gamma and conversion electron spectroscopy techniques. Many transitions are observed and a level scheme of 129Ba with deduced J~ values is proposed. The total decay energy of 129Ba is measured to be 3.72_+0.05MeV, which is compared with predictions of mass formulae. Low-lying structure of 129Ba is discussed in terms of collective models.

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Section: Spin-parity Assignment and Discussionmentioning

confidence: 98%

Structure of129Ba from the decay of129La

1979

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“…+P (4) if if if if (12) P(11) is the first-order excitation probability, r if the interference (22) between first and second order, and P a second-order term which may be if neglected in this approximation.…”

Section: Theorymentioning

confidence: 99%

“…Refs. [2][3][4][5][6][7][8][9][10][11]. However, the unambiguous interpretation of the reorientation effect depends sensitively on the' experimental conditions in the individual experiments.…”

Section: Introductionmentioning

confidence: 99%

ENERGY DEPENDENCE OF THE REORIENTATION EFFECT AND THE STATIC QUADRUPOLE MOMENT OF THE 0.847 MeV 2$sup +$ STATE IN $sup 56$Fe.

Thomson¹,

Scharenberg²,

Lutz³

1971

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Thi s rep ort was pre par ed as an acc oun t of wo rk spo nso red by the Uni ted Sta tes Gov ern men t. Nei the r the Uni ted Sta tes nor the Uni ted Sta tes Ato mic Ene rgy 1 Com mis sion , nor any of the ir em plo yee s, nor any of the ir con trac tors , sub con trac tors , or the ir emp loye es, i mak es any war ran ty, expr ess or imp lied , or ass ume s any lega l liab ility or resp ons ibili ty for the acc ura cy, complet ene ss or use fuln ess of any info rma tion , app arat us, pro duc t or proc ess disc lose d, or rep res ent s tha t its use I wou ld-n ot infr inge priv atel y own ed righ ts.

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Rotational and Quasi‐rotational Spectra in Even‐even Nuclei in the “New Region of Deformation”

Wilhelmi

1969

Fortschr. Phys.

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IntroductionEight years ago it was suggested [ I , 21 that apart from the three well known regions of deformation (150 < A < 190), ( A > 225) and ( A = 20 and A % 8) a new region of static nuclear deformation should exist for the highly neutron-deficient lanthanides for which both N and Z lie within the range 50-82.Experimental studies of this region were started by S h e l i n e and col.[2] whoobserved very low first excited states in 12sJasJ30Ba when measuring the radioactivity of even-mass neutron-deficient isotopes of praseodymium and lanthanum.The theoretical work of M~RSHALEK, PERSON and SHELINE [3], who calculated the nuclear deformation in this region and suggested a list of nuclei in the neighbourhood of barium most amenable to experimental observations, had a stimulating effect on the further progress of this research. From this work it followed that in the case of highly neutron-deficient nuclei of barium and cerium the deformation parameter can be as high as 0.30. I n the work quoted solely positive deformations were calculated. On the other hand KUMAR and BARANGER [4], who accounted for pairing correlations and quadrupole forces, showed as it could be expected that the nuclei in the neighbourhood of barium have large intrinsic quadrupole moments, which are, however, negative. It can be concluded therefrom that they are oblate which distinguishes them from all strongly deformed nuclei known which have prolate shapes. The work of professor Soloviev's group (ARSENIEV et al. [5]), supports this result and provides among other things contour maps for the negative deformation parameter in the range 50 < 2, N < 82.

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A determination of quadrupole moments In 114Cd, 130Ba, 148Sm and 150Sm

Cited by 86 publications

References 17 publications

Structure of129Ba from the decay of129La

Structure of129Ba from the decay of129La

ENERGY DEPENDENCE OF THE REORIENTATION EFFECT AND THE STATIC QUADRUPOLE MOMENT OF THE 0.847 MeV 2$sup +$ STATE IN $sup 56$Fe.

Rotational and Quasi‐rotational Spectra in Even‐even Nuclei in the “New Region of Deformation”

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