Excitation of collective optupole states in the Pd-Sm region

Hansén, O.; Nathan, O.

doi:10.1016/0029-5582(63)90728-4

Cited by 193 publications

(8 citation statements)

References 21 publications

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“…6,9 ' 10 Coulomb excitation of the 551(2+) keV and 1165(3-) states has been previously observed. [11][12][13][14] The reaction studies of Sm 148 described here confirm levels at 551,1182,1460,1595,1910,2039,2098 Table III. who also found evidence for additional levels at 1.07-, 1.36-, 1.81-, and 1.97(1-(? ))-MeV excitation.…”

Section: Errorssupporting

confidence: 66%

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Energy Levels inSm148andSm150

Kenefick

Sheline

1964

Phys. Rev.

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Energy levels in Sm 148 and Sm 160 have been observed via the reactions Sm 147 (^)Sm 148 , Sm 149 (d,^>)Sm 150 , Sm 148 (^')Sm 148 , and Sm 150 (^,^')Sm 160 a t 12-MeV bombarding energy. Reaction products were analyzed in a 0.1% energy resolution magnetic spectrograph using emulsion techniques. Levels below 1.9-MeV excitation are found to have much smaller (d,p) cross sections than those above this energy. Many previously unknown levels above 1-MeV excitation have been found in both these nuclei. The observed levels are compared with previous studies of these nuclei. Several of the positive parity levels in Sm 148 can be fitted to an asymmetric rotor-vibrator spectrum. The excited states in Sm 160 can be approximated, but not fitted exactly, with this model. The observed low-lying states in these nuclei are discussed in terms of expected level structure for collective models. The ground-state Q values for the reactions Sm 147 (d,^>)Sm 148 and Sm 149 (#,/>)Sm 160 are determined to be 5920=bl0 keV and 5764±4 keV, respectively.

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Section: Errorssupporting

confidence: 66%

“…The smooth variation of the energy of 3-states with neutron number has previously been pointed out. 14 The cross section of the 1434-keV level in Sm 148 is relatively high in the (p,p f ) spectra. This tends to 31a Note added in proof.…”

Section: Discussionmentioning

confidence: 97%

Energy Levels inSm148andSm150

Kenefick

Sheline

1964

Phys. Rev.

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“…In 112Cd we find that the prominent '3 -group' in the spectrum corresponds not to the previously reported r level at 1971 keY but to another level at 2004 keY. It thus appears that the previous r assignment (Hansen and Nathan 1963;McGowan et al 1965) was made to the wrong level. Gill et al (1974aGill et al ( , 1974b have questioned the existence of the r octupole states in the even cadmium isotopes.…”

Section: Discussion Of Resultsmentioning

confidence: 50%

Vibrational Excitations in the Even-mass Cadmium Isotopes

Warner¹,

Baxter²,

Esat³

et al. 1977

Aust. J. Phys.

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The backward-angle scattering of 4He ions from the even-A stable isotopes of cadmium has been investigated at bombarding energies above the Coulomb barrier. At 17· 5 MeV bombarding energy the gross features of the spectra are strikingly regular from one isotope to another, and this may be interpreted in terms of vibrational excitations. Other evidence is presented to support the concept of a uniform vibrational character for all the even-A stable cadmium isotopes. The spectra show no significant evidence for previously unreported levels in the two-quadrupole-phonon excitation region.However, a new level is found at 2304 ± 4 keY in l06Cd.

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“…In Fig. 6 we give the diagrams up to second-order in the expansion parameters, representing the collective and singleparticle contributions to the reduced E3 matrix elements between a U=3-state with an unperturbed The experimental B(E3;3(~0;-) values are determined in x42Ce [15] and 144Nd [16]. Although these data are known with large errors (of the order of 30 ~o), they have the same order of magnitude as the corresponding B(E3) value in the N=82 core nuclei, i.e.…”

Section: Wavefunctionsmentioning

confidence: 99%

“…Although most of the data concerns the energy spectra, some reduced transition probabilities and static moments have also been measured [11][12][13][14][15][16]. A one particle transfer reaction of the type 143Nd(d, p) yields strengths for various two-neutron components of the wavefunctions of the low-lying states in 144Nd [17].…”

Section: Introductionmentioning

confidence: 99%

A theoretical interpretation of the nuclear structure of the doubly-evenN=84 nuclei

Berghe¹

1975

Z Physik A

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The nuclear structure of the doubly-even N=84 nuclei has been explained in terms of the two-particle core coupling model. The positive parity states are studied in a diagonalization treatment, while the negative parity states are treated in a perturbation approach. Theoretical spectroscopic factors for a 143Nd(d, p) reaction are compared with experimental data. Electromagnetic properties are calculated and some of them (electric quadrupole moment, reduced E3 transition probability) are analysed by means of perturbation theory.

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Excitation of collective optupole states in the Pd-Sm region

Cited by 193 publications

References 21 publications

Energy Levels inSm148andSm150

Energy Levels inSm148andSm150

Vibrational Excitations in the Even-mass Cadmium Isotopes

A theoretical interpretation of the nuclear structure of the doubly-evenN=84 nuclei

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