A tabulation of gamma-gamma directional-correlation coefficients

Taylor, H.W.; Singh, Balraj; Prato, Frank S.; McPherson, R.

doi:10.1016/s0092-640x(71)80040-2

Cited by 67 publications

(24 citation statements)

References 4 publications

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“…As most of the non-yrast transitions in 150 Ce are very weak, we only obtained three angular correlation values of 779.0→300. = -0.0714 and A 4 = 0.0 for all the 7 − (E1)6 + (E2)4 + , 9 − (E1)8 + (E2)6 + and 11 − (E1)10 + (E2)8 + cascades [17]. These data allow only the spins of 7, 9, and 11 and establish the crossing transitions of 779.0, 750.1, and 731.0 keV between bands (2) and (1) as pure dipole, most probably E1 transitions.…”

Section: Experiments and Resultsmentioning

confidence: 92%

Observation of new levels and proposed octupole correlations in neutron-rich150Ce

et al. 2012

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Background : The very neutron-rich 150 Ce is located at the edge of the Z = 56, N=88 octupole deformed island. To study its high spin states and octupole correlations is important for systematically understanding the nuclear structural characteristics in this region. Purpose : To investigate the high spin state levels and to search for octopole correlations in 150 Ce. Methods : The high spin states of 150 Ce are studied by measuring the prompt γ-rays in the spontaneous fission of 252 Cf. The data analysis is by using the γ-γ-γ coincidence methods. The γ → γ(θ) angular correlation measurements are used to determine the spin and indirectly parity of particular levels. Results : A new level scheme of 150 Ce is established. A total of 47 new transitions and 25 new levels are identified comparing with previous results. Six collective bands have been observed and five of them are newly established. An octupole band structure with s = +1 in 150 Ce has been proposed. Systematic analysis for the B(E1)/B(E2) branching ratios, the levels of the octupole bands, the energy differences between negative-and positive-parity bands and the moments of inertia of the bands is carried out in 144,146,148,150 Ce. They give evidences for our assingment of octupole correlations in 150 Ce. The other characteristics of the octupole bands are discussed. Conclusions : An octupole band structure is proposed in 150 Ce. The octupole correlations in 150 Ce are weaker and show more instability than the neighboring lighter Ce isotopes.

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Section: Experiments and Resultsmentioning

confidence: 92%

Observation of new levels and proposed octupole correlations in neutron-rich150Ce

et al. 2012

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“…Our experimental γ−γ(θ) results and extracted δ values [36] and some comparison with theoretical values [37] are given in Table II and form the bases for the discussion below. These data offer further support for the I π assignments of 140 Xe in the present work.…”

Section: E1mentioning

confidence: 92%

Proposeds=±1octupole bands inXe140

et al. 2016

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Level structures of neutron-rich 140 Xe nucleus have been reinvestigated by using a triple γ coincidence study from the spontaneous fission of 252 Cf. Several new levels and transitions are identified. The previously observed s = +1 octupole band structure is confirmed and expanded. Another set of the △I = 2 positive-and negative-parity bands connected by strong E1 transitions is proposed as the s = −1 octupole band structure. Thus, the s = ±1 doublet octupole bands are completed in 140 Xe. The experimental B(E1)/B(E2) branching ratios indicate that the octupole correlations in 140 Xe are weak. The other characteristics of the s = ±1 octupole bands have been discussed.

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“…Assuming the 966 keY y ray to be pure E2 (Ewan et al 1961), we found the multipole admixture in the 299 keY y ray by the method of Taylor et al (1971). The two values of 0 obtained are -0·07 ~ 01 ~ 0·03 and -2·2 ~ O2 ~ -1·9.…”

Section: (A) 299~996 Kev Cascadementioning

confidence: 93%

“…All cascades were corrected for interference through Compton events from higher energy y rays falling in the gates of the various lower energy y rays by use of the intensity data given in Table 1. In analysing the correlation functions to obtain mixing ratios, the methods of Arns and Wiedenbeck (1958) and Taylor et al (1971) were used.…”

Section: ·1 8·9mentioning

confidence: 99%

Gamma Ray Intensity and Angular Correlation Measurements in 160Dy

Bhati¹,

Singh²,

Bajaj³

et al. 1976

Aust. J. Phys.

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Gamma-ray intensity measurements in 160Dy have been carried out using a Ge(Li) detector. In addition, 1'-1' angular correlation measurements have been made on 10 cascades in 160Dy using a Ge(Li)-NaI(TI) fast coincidence arrangement. These cascades are 299 ..... 966, 299 ..... 879, 879 ..... 87, 197 ..... 87, 962 ..... 87, 21S ..... 962, 299 ..... (879) ..... 87, 299 ..... (682) ..... 197, 21S ..... (962) ..... 87 and 21S ..... (76S) ..... 197 keY. Of these, the 21S ..... (962) ..... 87 and 21S ..... (76S) ..... 197 keY cascades have been measured for the first time. The multipolarities of the 197, 21S, 299, 879 and 962 keY transitions were found to be E2+(0'2�0'2)%M3, El +(2'S~~:g)%M2, El +(2~~)%M2, Ml +(99�1)%E2 and Ml + (98 � 1) % E2 respectively.

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A tabulation of gamma-gamma directional-correlation coefficients

Cited by 67 publications

References 4 publications

Observation of new levels and proposed octupole correlations in neutron-rich150Ce

Observation of new levels and proposed octupole correlations in neutron-rich150Ce

Proposeds=±1octupole bands inXe140

Gamma Ray Intensity and Angular Correlation Measurements in 160Dy

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