New band structures and an unpaired crossing in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>78</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Kr</mml:mi></mml:math>

Sun, Hui; Döring, J.; Johns, G. D.; Kaye, R. A.; Solomon, G. Z.; Tabor, S. L.; Devlin, M.; LaFosse, D. R.; Lerma, F.; Sarantites, D. G.; Baktash, C.; Rudolph, Dirk; Yu, C. H.; Lee, I. Y.; Macchiavelli, A. O.; Birriel, I.; Saladin, J. X.; Winchell, D. F.; Wood, V. Q.; Ragnarsson, I.

doi:10.1103/physrevc.59.655

Cited by 23 publications

(17 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The structure of the 78 Kr isotope is believed to be dominated at low and also intermediate and high spins by a strong oblate-prolate competition with clear effects on the spectroscopic quadrupole moments as well as on the g-factors of the corresponding states. In the 78 Kr nucleus, the identified rotational band was extended up to a tentative spin of I π = (26) + [26]. Experimental information is available on electromagnetic transitions and g-factors at low and intermediate spin states in this nucleus.…”

Section: Introductionmentioning

confidence: 98%

“…Many theoretical results have been confirmed experimentally, but sometimes the predictions are strongly dependent on peculiarities of the effective interaction and consequently they have a substantial amount of uncertainty, especially concerning local phenomena which may be connected with the prolate-oblate coexistence in this mass region. In recent years, many experimental investigations have been performed for the low, intermediate and high spin behaviour of the nucleus 78 Kr ( [20][21][22][23][24][25][26][27][28] and references therein). The structure of the 78 Kr isotope is believed to be dominated at low and also intermediate and high spins by a strong oblate-prolate competition with clear effects on the spectroscopic quadrupole moments as well as on the g-factors of the corresponding states.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shape coexistence effects in⁷⁸Kr

Petrovici

Schmid

Radu³

et al. 2006

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

Results are presented on shape coexistence effects in the nucleus 78 Kr obtained within the complex version of the EXCITED VAMPIR variational approach. Oblate-prolate coexistence and mixing is found to be responsible for the characteristic features identified at low excitation energy for low and intermediate as well as high spins. At the highest investigated spins, the high density of configurations having different deformations results in the fragmentation of B(E2) strengths explaining the experimentally identified forking of the spectrum. The present investigation indicates the essential role played by particular neutron-proton matrix elements of the effective interaction on the oblate-prolate coexistence and mixing in the 78 Kr nucleus.

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Shape coexistence effects in⁷⁸Kr

Petrovici

Schmid

Radu³

et al. 2006

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…For the present geometry, an ADO ratio ∼1.1 is expected for the stretched quadrupole transitions and ∼0.7 for the pure stretched dipoles. These values were obtained by extracting the ADO ratios of strong transitions in 78 Kr [41] whose multipolarities were already known. To distinguish the electric and magnetic character of the γ rays, linear polarization measurements [42] were performed using two clover detectors positioned at 90°relative to the beam direction as Compton polarimeters.…”

mentioning

confidence: 99%

Evidence for Octupole Correlations in Multiple Chiral Doublet Bands

Liu¹,

Wang²,

Bark³

et al. 2016

Phys. Rev. Lett.

104

View full text Add to dashboard Cite

Two pairs of positive-and negative-parity doublet bands together with eight strong electric dipole transitions linking their yrast positive-and negative-parity bands have been identified in 78 Br. They are interpreted as multiple chiral doublet bands with octupole correlations, which is supported by the microscopic multidimensionally-constrained covariant density functional theory and triaxial particle rotor model calculations. This observation reports the first example of chiral geometry in octupole soft nuclei. DOI: 10.1103/PhysRevLett.116.112501 Spontaneous symmetry breaking is a fundamental concept in nature. As a many-body quantum system, the atomic nucleus carries a wealth of information on fundamental symmetries and symmetry breaking. As one example, chiral symmetry breaking in atomic nuclei has attracted considerable attention and intensive discussion since it was first predicted by Frauendorf and Meng [1]. They pointed out that, in the intrinsic frame of the rotating triaxial nucleus, the total angular momentum vector may lie outside the three principal planes, referred to as chiral geometry. The spontaneous chiral symmetry breaking in the laboratory frame may give rise to pairs of nearly degenerate ΔI ¼ 1 bands with the same parity, i.e., chiral doublet bands. Such chiral doublet bands were first observed in N ¼ 75 isotones [2]. So far, more than 30 experimental candidates have been reported in the A ∼ 80, 100, 130, and 190 mass regions [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].Based on constrained triaxial covariant density functional theory (CDFT) calculations, it has been suggested that multiple chiral doublet (MχD) bands can exist in a single nucleus [21][22][23][24][25][26]. The theoretical prediction of MχD bands stimulated lots of experimental efforts [27][28][29][30][31]. The first experimental evidence for MχD bands was reported in 133 Ce [27], which confirmed the manifestation of triaxial shape coexistence in this nucleus. Later, Kuti et al. reported a novel type of MχD bands with the same configuration in 103 Rh [29], which showed that chiral geometry can be robust against the increase of the intrinsic excitation energy.Compared to the A ∼ 130 and 100 mass regions, the A ∼ 80 mass region is a relatively new and less studied territory for the investigation of chiral symmetry breaking in rotating nuclei, with only one report of chiral doublet bands based on the πg 9=2 ⊗ νg 9=2 configuration in odd-odd 80 Br [18]. In 78 Br, the πg 9=2 ⊗ νg 9=2 band was suggested to have an obvious triaxial shape [32], which is suitable for the construction of chiral doublet bands.

show abstract

“…The configuration dependent shell model calculation [19] also indicated an initial oblate deformation for the yrast band but shows a change to triaxiality for Á ½¾ · . TRS calculations give oblate, prolate and also triaxial minima at lower spins.…”

Section: Band Crossings In Krmentioning

confidence: 91%

“…For example, the light Kr isotopes like ¾ Kr [14,15] show almost simultaneous alignment [19] suggest oblate deformation at low spins and a triaxial shape at higher spins´Á ½¾ · µ.…”

Section: Band Crossings In Krmentioning

confidence: 97%

Nuclear structure and Indian Clover array

Jain

2001

Pramana - J Phys

View full text Add to dashboard Cite

A brief description of the nuclear structure studies performed with the 14-UD pelletron at TIFR has been presented. The experimental facilities developed for these studies are described. Some of the interesting results obtained for mass 70 to 80 nuclei are presented. The development of a recoil mass spectrometer and an Indian clover array for the study of high spin states in nuclei near drip lines is discussed.

show abstract

New band structures and an unpaired crossing in78Kr

Cited by 23 publications

References 33 publications

Shape coexistence effects in⁷⁸Kr

Shape coexistence effects in⁷⁸Kr

Evidence for Octupole Correlations in Multiple Chiral Doublet Bands

Nuclear structure and Indian Clover array

Contact Info

Product

Resources

About

New band structures and an unpaired crossing in78Kr

Cited by 23 publications

References 33 publications

Shape coexistence effects in78Kr

Shape coexistence effects in78Kr

Evidence for Octupole Correlations in Multiple Chiral Doublet Bands

Nuclear structure and Indian Clover array

Contact Info

Product

Resources

About

Shape coexistence effects in⁷⁸Kr

Shape coexistence effects in⁷⁸Kr