Comment on “Probing nuclear structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Xe</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>124</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>”

Rainovski, G.; Balabanski, D. L.; Dimitrov, V. I.

doi:10.1103/physrevc.72.029801

Cited by 22 publications

(33 citation statements)

References 12 publications

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“…Such chiral doublet bands were first identified in four N = 75 isotones in 2001 [2]. So far, many chiral candidate nuclei have been reported experimentally in the A ∼ 80, 100, 130, and 190 mass regions [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Besides the simplest chiral configurations composed of one unpaired proton and neutron, composite chiral configurations, containing more than one unpaired protons and/or neutrons, have also been observed in the odd-mass or even-even neighbors of the odd-odd chiral nuclei [10,18].…”

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confidence: 99%

Multiple Chiral Doublet Bands of Identical Configuration inRh103

et al. 2014

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Three sets of chiral doublet band structures have been identified in the 103 Rh nucleus. The properties of the observed chiral doublet bands are in good agreement with theoretical results obtained using constrained covariant density functional theory and particle rotor model calculations. Two of them belong to an identical configuration, and provide the first experimental evidence for a novel type of multiple chiral doublets, where an "excited" chiral doublet of a configuration is seen together with the "yrast" one. This observation shows that the chiral geometry in nuclei can be robust against the increase of the intrinsic excitation energy.PACS numbers: 21.10. Hw,21.10.Re,23.20.Lv A novel form of spontaneous symmetry breaking, the chiral rotation of triaxial nuclei, was suggested in 1997 [1]. It was shown that in special circumstances, referred to as chiral geometry, in the intrinsic frame of the rotating triaxial nucleus the total angular momentum vector lies outside the three principal planes. Thus, its components along the principal axes can be oriented in leftand right-handed ways. In the laboratory frame the chiral symmetry is restored, which manifests itself as a pair of ∆I = 1 nearly degenerate bands with the same parity. Such chiral doublet bands were first identified in four N = 75 isotones in 2001 [2]. So far, many chiral candidate nuclei have been reported experimentally in the A ∼ 80, 100, 130, and 190 mass regions [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Besides the simplest chiral configurations composed of one unpaired proton and neutron, composite chiral configurations, containing more than one unpaired protons and/or neutrons, have also been observed in the odd-mass or even-even neighbors of the odd-odd chiral nuclei [10,18]. These observations show that chirality is not restricted to a certain configuration in a mass region, i.e. the chiral geometry can be robust against the change of configuration. It was even demonstrated recently by Meng et al. [22][23][24][25], based on adiabatic and configuration-fixed constrained triaxial covariant density functional theory (CDFT) calculations, that it is possible to have multiple pairs of chiral doublet bands in a single nucleus, and the acronym MχD was introduced for this phenomenon. The first experimental evidence for the predicted MχD has been reported in 133 Ce [26], and also possibly in 107 Ag [27].It is also interesting to study the robustness of chiral geometry against the increase of the intrinsic excitation energy, i.e. if the chiral geometry is sustained in the higher-lying bands of a certain chiral configuration. In all the known cases the chiral doublet corresponds to the two lowest-lying bands of a configuration. Even for MχD in133 Ce [26] and 107 Ag [27], each chiral doublet structure corresponds to two lowest-lying bands with a distinct configuration. Therefore, study of the third and forth bands of the same chiral configuration is needed to answer the question of the investigated robustness. Very recent ...

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confidence: 99%

Multiple Chiral Doublet Bands of Identical Configuration inRh103

et al. 2014

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“…One of the most intriguing phenomena discussed in medium and heavy nuclei is the appearance of the nearly degenerate doublet bands in doubly odd nuclei. Such pairs of bands built on the νh 11/2 ⊗ πh 11/2 configuration have been experimentally found in many doubly odd nuclei in the mass A ∼ 130 region [1][2][3][4][5][6]. Previously these bands were interpreted as a manifestation of the chiral doublet bands [7].…”

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confidence: 99%

A simple model for doublet bands in doubly odd nuclei

Yoshinaga

Higashiyama

2006

Eur. Phys. J. A

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Abstract. Nuclear structure of doublet bands in doubly odd nuclei with mass A ∼ 130 is investigated within the framework of a simple model where the even-even core couples with a neutron and a proton in intruder orbitals through a quadrupole-quadrupole interaction. The model reproduces quite well the energy levels of doublet bands and electromagnetic transitions. The staggering of the ratios B(M 1; I → I − 1)/B(E2; I → I − 2) of the yrast bands turns out to be described by the chopsticks-like motion of two angular momenta of the unpaired neutron and the unpaired proton when they are weakly coupled with the core. One of the most intriguing phenomena discussed in medium and heavy nuclei is the appearance of the nearly degenerate doublet bands in doubly odd nuclei. Such pairs of bands built on the νh 11/2 ⊗ πh 11/2 configuration have been experimentally found in many doubly odd nuclei in the mass A ∼ 130 region [1][2][3][4][5][6]. Previously these bands were interpreted as a manifestation of the chiral doublet bands [7]. However, many of recent experiments and analyses do not support this interpretation [8][9][10][11][12]. Recently, we have proposed a pair truncated shell model (PTSM) where the even-even core made of the collective pairs couples with a neutron and a proton in high-j intruder orbitals [13][14][15]. The PTSM successfully describes the properties of doubly odd nuclei in the mass A ∼ 130 region, i.e., both energy spectra and features of electromagnetic transitions. Now the band structure of the doublet bands is well explained by the chopsticks-like motion of two angular momenta of the odd neutron and the odd proton, weakly coupled with the core. Since the PTSM results are rather complicated to analyze, we need a further simplified model to pinpoint the essential mechanism more closely.In this letter we propose a quadrupole coupling model (QCM) where the even-even collective core couples with a neutron and a proton in the high-j intruder orbitals through a quadrupole-quadrupole interaction, and we apply this model to the doublet bands in the mass A ∼ 130 region. In the region, several valence proton particles and a e-mail: yoshinaga@phy.saitama-u.ac.jp valence neutron holes are coupled to the doubly magic nucleus 132 Sn. In the QCM, the states of doubly odd nuclei (neutron number N and proton number Z) with the νh 11/2 ⊗ πh 11/2 configuration are assumed to be constructed by a neutron hole, a proton particle in the 0h 11/2 intruder orbitals, and a collective core. The core is assumed to be made of N + 1 neutrons and Z − 1 protons. A system of one neutron hole in the orbital j ν and one proton particle in the orbital j π is specified as the state |j ν j π ; L , where L is the angular momentum of the particle-hole state. The collective-core state is denoted as |R , where R indicates the angular momentum of the core state. In the simplest version of the model we assume that the neutron and the proton outside the core couple only with the yrast states of the core. Then, a total wave function of any doubly o...

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“…For the present RDDS and DSAM measurements, the rings of main interest are those where appreciable Doppler shifts can be observed. These are the rings 5,6,7,8,9, and 10 at angles of 122.6, 130.4, 137.6, 147.5, 156.1, and 163.5 degrees, respectively. Events were collected when at least three γ rays in the Ge cluster or clover segments and three segments of the inner ball fired in coincidence.…”

Section: Prmentioning

confidence: 99%

“…Since the chiral symmetry is dichotomic, its spontaneous breaking by the axial angular momentum vector leads to a pair of degenerate ΔI = 1 rotational bands, called chiral doublet bands. Pairs of bands, presumably due to the breaking of the chiral symmetry in triaxial nuclei, have been found in the mass regions A∼130 [4][5][6][7][8][9], A∼105 [10][11][12][13][14][15] and A∼195 [16][17][18], and A∼80 [19]. There is also a significant interest from theoretical point of view to investigate the chiral phenomenon [2,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems

Tonev

Yavahchova

Angelis

et al. 2016

EPJ Web of Conferences

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Abstract. Two odd-odd nuclei from the A ∼ 100 and A ∼ 130 regions, namely 102 Rh and 134 Pr have been studied in search for chiral doublet bands via 94 Zr( 11 B,3n) 102 Rh and 119 Sn( 19 F,4n) 134 Pr reactions, respectively. Two nearly degenerate bands built on the πg 9/2 ⊗ νh 11/2 configuration have been identified in 102 Rh and on the πg 11/2 ⊗ νh 11/2 configuration for 134 Pr. Lifetimes of excited nuclear states were measured using Dopplershift attenuation method and recoil distance Doppler-shift method. The deexciting gamma rays were registered by the Indian National Gamma Array for 102 Rh and using the EUROBALL IV detector array with an inner Bismuth Germanate (BGO) ball for 134 Pr, respectively. Polarization and angular correlation measurements have been performed to establish the spin and parity assignments for these bands. The derived reduced transition probabilities are compared to the predicitons of the two quasiparticles + triaxial rotor and interacting boson fermion-fermion models.

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Comment on “Probing nuclear structure ofXe124”

Cited by 22 publications

References 12 publications

Multiple Chiral Doublet Bands of Identical Configuration inRh103

Multiple Chiral Doublet Bands of Identical Configuration inRh103

A simple model for doublet bands in doubly odd nuclei

Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems

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