Multiple chiral bands in $$^{137}$$Nd

Petrache, C. M.; Lyu, Bo; Chen, Q. B.; Meng, J.; Astier, A.; Dupont, E.; Zheng, Kaikai; Greenlees, P. T.; Badran, H.; Calverley, T.; Cox, D. M.; Grahn, T.; Hilton, J.; Julin, R.; Juutinen, S.; Konki, J.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Scholey, C.; Sorri, J.; Stolze, S.; Uusitalo, J.; Cederwall, B.; Ertoprak, A.; Liu, H.; Guo, S.; Wang, J. G.; Zhou, X. H.; Kuti, I.; Tímár, J.; Tucholski, A.; Srebrny, J.; Andreoiu, C.

doi:10.1140/epja/s10050-020-00218-5

Cited by 11 publications

(3 citation statements)

References 39 publications

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“…Another experimental fingerprint of nonaxial nuclear shapes is the observation of a pair of chiral doublet bands. Evidence of chiral doublet bands has been found in 135 Ce [47], as well as in several other neighboring nuclei such as [135][136][137][138] Nd [45,[48][49][50][51], 133 Ce [52], 133 La [53], and 131 Ba [54]. Apart from these, a number of γ -vibrational bands have been observed in this region.…”

Section: Discussionmentioning

confidence: 98%

Search for the origin of wobbling motion in the A≈130 region: The case of Xe131

Chakraborty¹,

Bhattacharyya²,

Banik³

et al. 2023

Phys. Rev. C

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In-beam γ -ray spectroscopy of 131 Xe was carried out to study the structure of the intruder νh 11/2 band. Excited states were populated via an α-induced fusion-evaporation reaction at E α = 38 MeV. Inspection of γ γ -coincidence data resulted in the identification of a new rotational sequence. Based on the systematics of excitation energy, assigned spin-parity, decay pattern, and the electromagnetic character of the interband I = 1 γ transitions, this sequence is proposed as the unfavored signature partner of the νh 11/2 band. The structure of this band is further illuminated in the light of the triaxial particle rotor model (TPRM). The possibility of wobbling excitation in N = 77 Xe-Ba-Ce isotones was explored in a systematic manner.

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Section: Discussionmentioning

confidence: 98%

Search for the origin of wobbling motion in the A≈130 region: The case of Xe131

Chakraborty¹,

Bhattacharyya²,

Banik³

et al. 2023

Phys. Rev. C

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“…Refs. [41][42][43] provide detailed experimental information on the setup and data processing. By combining the angular correlation and linear polarization methods, the mixing ratio value of the ∆I = 1, 751-keV transition liking the one-phonon and zero-phonon wobbling bands is determined.…”

Section: Wobbling Motion In Even-even Triaxial Nucleimentioning

confidence: 99%

Wobbling motion in nuclei

Petrache¹,

Lv²

2023

Preprint

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Wobbling motion as an exotic collective mode in nuclei without axial symmetry, was intensively discussed during the last few years. The observation of the newly proposed transverse wobbling, first reported in $^{135}$Pr and soon after in nuclei from other mass regions, was considered as a significant discovery in low-spin nuclear structure. However, both the reported experimental results and the proposed theoretical models were lively questioned in a series of works devoted to the investigation of the low-spin wobbling mode in the same nucleus. The electromagnetic properties of the $\Delta I=1$ transitions connecting the one- to zero-phonon and the two- to one-phonon wobbling bands in $^{135}$Pr were recently remeasured, demonstrating their predominant $M1$ magnetic character which is in contradiction with the wobbling motion interpretation. These new experimental observables being well reproduced by both quasiparticle-plus-triaxial-rotor model and interacting boson-fermion model calculations, are against the previously proposed wobbling characteristics of the low-spin bands in $^{135}$Pr. On the other hand, we obtained conclusive experimental evidence for the theoretically suggested transverse wobbling bands at medium spin in $^{136}$Nd. The comparison of the experimental data with calculations utilizing the triaxial projected shell model and a new developed particle-rotor model with frozen orthogonal geometry of the active nucleons, supports the description in terms of transverse wobbling of medium-spin bands in triaxial even-even nuclei.

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“…Nuclear chirality [2] has been intensively studied, and many chiral nuclei have been identified in the A ≈ 130 mass region (e.g., 131 Ba [3], 133 La [4], 133 Ce [5], 135,136,137,138 Nd [6][7][8][9][10][11], 124,126,128,130 Cs [12][13][14][15][16]), as well as in the A ≈ 190 mass region (e.g., 193,194,195,198 Tl [17][18][19][20][21][22]), in the A ≈ 100 mass region (e.g., 103,105,111,113 Rh [23][24][25][26], 105,107 Ag [27,28]), and in the A ≈ 80 mass region (e.g., 78,80 Br [29,30]), making this motion a more common phenomenon. For a recent review on chirality over the nuclear chart see Ref.…”

Section: Introductionmentioning

confidence: 99%

Tilted precession bands in Nd135

Lyu¹,

Petrache²,

Lawrie³

et al. 2021

Phys. Rev. C

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Two new excited bands built on the π h 11/2 configuration have been identified in 135 Nd in addition to the known π h 11/2 band. The energy spectra of the excited bands and the available electromagnetic transition probabilities are in good agreement with theoretical results obtained using quasiparticle-plus-triaxial-rotor model calculations. The properties of the bands identify them as tilted precession bands instead of wobbling bands. Our results give a new insight into the interpretation of the low-lying bands in odd-A mass nuclei, and can stimulate future studies to address the nuclear triaxiality.

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Multiple chiral bands in $$^{137}$$Nd

Cited by 11 publications

References 39 publications

Search for the origin of wobbling motion in the A≈130 region: The case of Xe131

Search for the origin of wobbling motion in the A≈130 region: The case of Xe131

Wobbling motion in nuclei

Tilted precession bands in Nd135

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