Observation of multiphonon transverse wobbling in 133Ba

K. Rojeeta Devi; Suresh Kumar; Naveen Kumar; Neelam; F. S. Babra; Md S.R. Laskar; S. Biswas; S. Saha; P. Singh; S. Samanta; S. Das; S. Chakraborty; R. P. Singh; S. Muralithar; A. Kumar

doi:10.1016/j.physletb.2021.136756

Observation of multiphonon transverse wobbling in ¹³³Ba

K. Rojeeta Devi, Suresh Kumar, Naveen Kumar, Neelam, F. S. Babra, Md S.R. Laskar, S. Biswas, S. Saha, P. Singh, S. Samanta, S. Das, S. Chakraborty, R. P. Singh, S. Muralithar, A. Kumar

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13 Scopus citations

Abstract

The low-lying negative parity states in the ¹³³Ba nucleus have been investigated using the ¹²⁴Sn(¹³C, 4nγ)¹³³Ba reaction at E_lab = 48 MeV. With the addition of new γ-transitions, n_ω=0,1,2 wobbling bands were identified in this nucleus. The angular correlations and linear polarization measurements have been performed to confirm the spin and parity of the states. Predominant E2 character was obtained for the inter-linking ΔI=1 transitions between the successive phonon (Δn_ω=1) wobbling bands. The transverse nature of the wobbling bands is concluded on the basis of observed decreasing behavior of the wobbling frequency with increasing spin. The quasiparticle triaxial rotor model calculations are found to be in agreement with the experimentally determined wobbling frequency and the transition probability ratios. This letter reports the first observation of transverse wobbling mode associated with a hole-like quasiparticle.

Original language	English
Article number	136756
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	823
DOIs	https://doi.org/10.1016/j.physletb.2021.136756
State	Published - 10 Dec 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021

Funding

K. Rojeeta Devi acknowledges financial assistance provided by the University Grants Commission (UGC), India through the University of Delhi and by the Inter-University Accelerator Centre (IUAC), New Delhi for Research Associateship vide ref. no. IUAC/SC/RA/2019/5292 . Suresh Kumar acknowledges the R & D grant provided by the University of Delhi . We are grateful to Prof. R. Palit for his support during the experiment and for the feedback. The support provided by the staff of the TIFR-BARC pelletron facility and the Nuclear Physics group at TIFR is also gratefully acknowledged. K. Rojeeta Devi acknowledges financial assistance provided by the University Grants Commission (UGC), India through the University of Delhi and by the Inter-University Accelerator Centre (IUAC), New Delhi for Research Associateship vide ref. no. IUAC/SC/RA/2019/5292. Suresh Kumar acknowledges the R & D grant provided by the University of Delhi. We are grateful to Prof. R. Palit for his support during the experiment and for the feedback. The support provided by the staff of the TIFR-BARC pelletron facility and the Nuclear Physics group at TIFR is also gratefully acknowledged.

Funders	Funder number
TIFR-BARC
Tata Institute of Fundamental Research
University Grants Commission
University of Delhi
Inter-University Accelerator Centre	IUAC/SC/RA/2019/5292

Keywords

Mixing ratio
Multiphonon transverse wobbling

Access to Document

10.1016/j.physletb.2021.136756

Cite this

Rojeeta Devi, K., Kumar, S., Kumar, N., Neelam, Babra, F. S., Laskar, M. S. R., Biswas, S., Saha, S., Singh, P., Samanta, S., Das, S., Chakraborty, S., Singh, R. P., Muralithar, S., & Kumar, A. (2021). Observation of multiphonon transverse wobbling in ¹³³Ba. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 823, Article 136756. https://doi.org/10.1016/j.physletb.2021.136756

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title = "Observation of multiphonon transverse wobbling in 133Ba",

abstract = "The low-lying negative parity states in the 133Ba nucleus have been investigated using the 124Sn(13C, 4nγ)133Ba reaction at Elab = 48 MeV. With the addition of new γ-transitions, nω=0,1,2 wobbling bands were identified in this nucleus. The angular correlations and linear polarization measurements have been performed to confirm the spin and parity of the states. Predominant E2 character was obtained for the inter-linking ΔI=1 transitions between the successive phonon (Δnω=1) wobbling bands. The transverse nature of the wobbling bands is concluded on the basis of observed decreasing behavior of the wobbling frequency with increasing spin. The quasiparticle triaxial rotor model calculations are found to be in agreement with the experimentally determined wobbling frequency and the transition probability ratios. This letter reports the first observation of transverse wobbling mode associated with a hole-like quasiparticle.",

keywords = "Mixing ratio, Multiphonon transverse wobbling",

author = "{Rojeeta Devi}, K. and Suresh Kumar and Naveen Kumar and Neelam and Babra, {F. S.} and Laskar, {Md S.R.} and S. Biswas and S. Saha and P. Singh and S. Samanta and S. Das and S. Chakraborty and Singh, {R. P.} and S. Muralithar and A. Kumar",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = dec,

day = "10",

doi = "10.1016/j.physletb.2021.136756",

language = "אנגלית",

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Rojeeta Devi, K, Kumar, S, Kumar, N, Neelam, Babra, FS, Laskar, MSR, Biswas, S, Saha, S, Singh, P, Samanta, S, Das, S, Chakraborty, S, Singh, RP, Muralithar, S & Kumar, A 2021, 'Observation of multiphonon transverse wobbling in ¹³³Ba', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 823, 136756. https://doi.org/10.1016/j.physletb.2021.136756

TY - JOUR

T1 - Observation of multiphonon transverse wobbling in 133Ba

AU - Rojeeta Devi, K.

AU - Kumar, Suresh

AU - Kumar, Naveen

AU - Neelam,

AU - Babra, F. S.

AU - Laskar, Md S.R.

AU - Biswas, S.

AU - Saha, S.

AU - Singh, P.

AU - Samanta, S.

AU - Das, S.

AU - Chakraborty, S.

AU - Singh, R. P.

AU - Muralithar, S.

AU - Kumar, A.

PY - 2021/12/10

Y1 - 2021/12/10

N2 - The low-lying negative parity states in the 133Ba nucleus have been investigated using the 124Sn(13C, 4nγ)133Ba reaction at Elab = 48 MeV. With the addition of new γ-transitions, nω=0,1,2 wobbling bands were identified in this nucleus. The angular correlations and linear polarization measurements have been performed to confirm the spin and parity of the states. Predominant E2 character was obtained for the inter-linking ΔI=1 transitions between the successive phonon (Δnω=1) wobbling bands. The transverse nature of the wobbling bands is concluded on the basis of observed decreasing behavior of the wobbling frequency with increasing spin. The quasiparticle triaxial rotor model calculations are found to be in agreement with the experimentally determined wobbling frequency and the transition probability ratios. This letter reports the first observation of transverse wobbling mode associated with a hole-like quasiparticle.

AB - The low-lying negative parity states in the 133Ba nucleus have been investigated using the 124Sn(13C, 4nγ)133Ba reaction at Elab = 48 MeV. With the addition of new γ-transitions, nω=0,1,2 wobbling bands were identified in this nucleus. The angular correlations and linear polarization measurements have been performed to confirm the spin and parity of the states. Predominant E2 character was obtained for the inter-linking ΔI=1 transitions between the successive phonon (Δnω=1) wobbling bands. The transverse nature of the wobbling bands is concluded on the basis of observed decreasing behavior of the wobbling frequency with increasing spin. The quasiparticle triaxial rotor model calculations are found to be in agreement with the experimentally determined wobbling frequency and the transition probability ratios. This letter reports the first observation of transverse wobbling mode associated with a hole-like quasiparticle.

KW - Mixing ratio

KW - Multiphonon transverse wobbling

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