Rotational band structures and lifetime measurements in<sup>130</sup>Ce

Todd, Derick; Aryaeinejad, R.; Love, D J G; Nelson, A H; Nolan, P. J.; Smith, P.; Twin, P.J.

doi:10.1088/0305-4616/10/10/012

Cited by 82 publications

(28 citation statements)

References 27 publications

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“…The experimental data [1][2][3][4][5] shows that this collective pattern evolves rapidly in moving from 132 Ce to 130 Ce to 128 Ce. Sometime ago, Zhang et al [11] pointed out that E + 4 /E + 2 ratio is an important parameter for determining the shape of a nucleus.…”

Section: Introductionmentioning

confidence: 88%

“…The experimental data [1][2][3][4][5] ) as an effect of h 11/2 neutron alignment process. It has been found that theoretical attempts have been made by many authors to study specific nuclei and there is a lack of microscopic calculation to study the low-lying systematics of the entire neutron-deficient part of Ce isotopic mass chain in a single framework.…”

Section: Introductionmentioning

confidence: 99%

“…An inspection of the recent experimental data [1][2][3][4][5][6][7][8][9][10], for example the energy level spacings and the lifetimes of excited states in the light neutron-deficient Cerium (Ce) nuclei reveals a region of pronounced collective behavior. The experimental data [1][2][3][4][5] shows that this collective pattern evolves rapidly in moving from 132 Ce to 130 Ce to 128 Ce.…”

Section: Introductionmentioning

confidence: 99%

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Microscopic study of deformed neutron-deficient 124-132Ce isotopes

Bhat¹,

Devi²,

Khosa³

2003

Braz. J. Phys.

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Variation after Projection (VAP) calculations in conjunction with Hartree Bogoliubov (HB) ansatz have been carried out for 124−132 Ce mass chain. In this framework, the yrast spectra, B(E2) transition probabilities and occupation numbers for various shell model orbits have been obtained. The observed decrease in deformation in going from 124 Ce to 132 Ce is seen to arise due to a slow decrease in the occupation of 1g 7/2 proton orbit and a systematic increase in the occupations of 2d 5/2 , 1g 7/2 and 1h 11/2 neutron orbits. Besides this, the experimental low-lying yrast spectra and B(E2) transition probabilities are reproduced with reasonable accuracy by using PQOH interaction. I IntroductionAn inspection of the recent experimental data [1-10], for example the energy level spacings and the lifetimes of excited states in the light neutron-deficient Cerium (Ce) nuclei reveals a region of pronounced collective behavior. The experimental data [1][2][3][4][5] ) as an effect of h 11/2 neutron alignment process. It has been found that theoretical attempts have been made by many authors to study specific nuclei and there is a lack of microscopic calculation to study the low-lying systematics of the entire neutron-deficient part of Ce isotopic mass chain in a single framework. It is with this motivation to study the low-lying systematics of the neutron-deficient isotopes that we plan to study these nuclei in a suitable calculational framework.In the present paper an attempt has been made to carry out a microscopic study of the yrast states and B(E2) transition probabilities in the neutron-deficient 124−132 Ce, by employing the VAP [13] formalism in conjunction with the HB [14] ansatz for the axially symmetric wave functions. For the calculation of yrast levels, the pairing plus-quadrupolequadrupole-plus-octupole-octupole plus-hexadecapolehexadecapole (PQOH) model of effective interaction in a valence space spanned by 3s 1/2 , 2d 3/2 , 2d 5/2 , 2f 7/2 , 1g 7/2 , 1h 9/2 , 1h 11/2 and 1i 13/2 orbits for protons as well as neutrons is employed. The 100 Sn is considered as an inert core. II Calculational details II.1 The one and two body parts of the HamiltonianThe spherical single-particle energies (S.P.E.'s) that we have employed are (in MeV): (2d 5/2 ) = 0.0, (3s 1/2 ) = 1.4, (2d 3/2 ) = 2.0, (1g 7/2 ) = 4.0, (1h 11/2 ) = 6.5, (2f 7/2 ) = 13.0, (1h 9/2 ) = 14.0 and (1i 13/2 ) = 15.5. The S.P.E.'s of 2d 5/2 , 3s 1/2 , 2d 3/2 , 1g 7/2 and 1h 11/2 are nearly the same as that employed by Vergados and Kuo [15] as well as

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microscopic study of deformed neutron-deficient 124-132Ce isotopes

Bhat¹,

Devi²,

Khosa³

2003

Braz. J. Phys.

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“…18 can be interpreted as due to K mixing within the parent states of the 162 Er, 164 Er, [24,[35][36][37][38][39][40]. The horizontal axis is the ratio of the ground-state-band dynamic and kinematic moments of inertia.…”

Section: B 162 Ermentioning

confidence: 99%

Discovery of isomers in dysprosium, holmium, and erbium isotopes withN=94to 97

et al. 2012

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High-spin states in the 164 68 Er 96 region were studied using 9 Be + 160 Gd reactions. Pulsed beam conditions were exploited for enhanced sensitivity to delayed γ -ray transitions. New isomers were identified in 161 Dy, 163 Ho, 162 Er, and 165 Er. The 162 Er isomer is interpreted to decay by E1 transitions to the ground-state band with a reduced hindrance of f ν = 33. A plot of f ν values for all K = 7, E1 transitions from two-quasiparticle isomers to the ground-state bands of even-even nuclei reveals only a small influence from the dynamic to kinematic moment-of-inertia ratio, which provides a measure of Coriolis K mixing within the ground-state band. This is interpreted to imply that the relatively low hindrances are due to K mixing in the isomer, caused by a combination of Coriolis and octupole band mixing.

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“…125 Ce [4,15,16]; 126 Ce [5,17]; 127 Ce [18,19]; 128 Ce [20]; 129 Ce [19,21]; 130 Ce [22]; 131 Ce [23]; and 132 Ce [24]. In the odd-A cerium isotopes 125−131 Ce, the yrast bands are based upon an h 11/2 neutron orbital, and several other rotational bands, based on d 5/2 , g 7/2 , and d 3/2 neutron orbitals, are also observed for each nucleus.…”

Section: Previous Spectroscopy Of Cerium Isotopesmentioning

confidence: 99%